{ "version": "v1", "source": "https://craftquantities.com", "licence": "CC BY 4.0", "licenceUrl": "https://creativecommons.org/licenses/by/4.0/", "attribution": "Craft Quantities — craftquantities.com", "documentation": "https://craftquantities.com/api/", "versioning": "Fields are added, never removed or repurposed, within a version. 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"acres-to-hectares-calculator", "category": "measurements-conversions", "title": "Acres to Hectares Calculator", "description": "Convert acres to hectares for metric planning submissions and international land descriptions.", "url": "https://craftquantities.com/calculators/measurements-conversions/acres-to-hectares-calculator/", "json": "https://craftquantities.com/api/v1/calculators/acres-to-hectares-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "acres-to-square-feet-calculator", "category": "measurements-conversions", "title": "Acres to Square Feet Calculator", "description": "Convert acreage into square feet for material take-off across a site.", "url": "https://craftquantities.com/calculators/measurements-conversions/acres-to-square-feet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/acres-to-square-feet-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "active-pressure-surcharge-calculator", "category": "materials-quantities", "title": "Rankine Active Earth Pressure with Surcharge Calculator", "description": "Compute the Rankine active earth pressure resultant on a wall, including an additional uniform surcharge load behind it.", "url": "https://craftquantities.com/calculators/materials-quantities/active-pressure-surcharge-calculator/", "json": "https://craftquantities.com/api/v1/calculators/active-pressure-surcharge-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "activity-duration-crew-size-calculator", "category": "financial-adjacent", "title": "Activity Duration and Crew Size Calculator", "description": "Turn a quantity of work and a crew's output per day into a duration in working days — or, from a deadline, into the number of crews it takes.", "url": "https://craftquantities.com/calculators/financial-adjacent/activity-duration-crew-size-calculator/", "json": "https://craftquantities.com/api/v1/calculators/activity-duration-crew-size-calculator.json", "inputCount": 6, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-22" }, { "slug": "ada-ramp-handrail-extension-calculator", "category": "materials-quantities", "title": "ADA Ramp Handrail Extension Calculator", "description": "Calculate the total handrail length needed for a ramp run, including the required ADA extension at each end.", "url": "https://craftquantities.com/calculators/materials-quantities/ada-ramp-handrail-extension-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ada-ramp-handrail-extension-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "ada-ramp-length-calculator", "category": "materials-quantities", "title": "Commercial ADA Accessible Ramp Length & Landing Calculator", "description": "Calculate the total horizontal length and number of intermediate landings needed for a permanent ADA-compliant accessible ramp.", "url": "https://craftquantities.com/calculators/materials-quantities/ada-ramp-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ada-ramp-length-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-22" }, { "slug": "aggregate-fineness-modulus-calculator", "category": "materials-quantities", "title": "Aggregate Fineness Modulus Calculator (ASTM C136)", "description": "Compute an aggregate's fineness modulus from a standard sieve analysis, per ASTM C136.", "url": "https://craftquantities.com/calculators/materials-quantities/aggregate-fineness-modulus-calculator/", "json": "https://craftquantities.com/api/v1/calculators/aggregate-fineness-modulus-calculator.json", "inputCount": 7, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "aggregate-moisture-correction-calculator", "category": "materials-quantities", "title": "Concrete Aggregate Moisture Correction Calculator", "description": "Correct a concrete mix's batch weights and water for the moisture measured in your sand and stone, so the water-cement ratio stays as designed.", "url": "https://craftquantities.com/calculators/materials-quantities/aggregate-moisture-correction-calculator/", "json": "https://craftquantities.com/api/v1/calculators/aggregate-moisture-correction-calculator.json", "inputCount": 8, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-15" }, { "slug": "air-barrier-tape-calculator", "category": "materials-quantities", "title": "Air Barrier Sealant Tape Linear Footage Calculator", "description": "Calculate the air barrier seam tape needed to seal sheathing joints and penetrations, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/air-barrier-tape-calculator/", "json": "https://craftquantities.com/api/v1/calculators/air-barrier-tape-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "air-changes-per-hour-calculator", "category": "insulation-efficiency", "title": "Air Changes Per Hour (ACH50) Calculator", "description": "Calculate a building's ACH50 airtightness metric from a blower door test's CFM50 reading.", "url": "https://craftquantities.com/calculators/insulation-efficiency/air-changes-per-hour-calculator/", "json": "https://craftquantities.com/api/v1/calculators/air-changes-per-hour-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "air-dirt-separator-calculator", "category": "materials-quantities", "title": "Hydronic Air/Dirt Separator Sizing Calculator", "description": "Calculate the minimum connection size for a hydronic air/dirt separator at the system's design flow rate.", "url": "https://craftquantities.com/calculators/materials-quantities/air-dirt-separator-calculator/", "json": "https://craftquantities.com/api/v1/calculators/air-dirt-separator-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "air-entrainment-dosage-calculator", "category": "materials-quantities", "title": "Concrete Air-Entrainment Admixture Dosage Calculator", "description": "Compute the total air-entraining admixture volume needed for a concrete batch from its dosage rate.", "url": "https://craftquantities.com/calculators/materials-quantities/air-entrainment-dosage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/air-entrainment-dosage-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "air-permeability-q50-calculator", "category": "insulation-efficiency", "title": "Air Permeability (q50) and Test Flow Calculator", "description": "Air permeability (q50) from an air tightness test's flow over the envelope area, or the fan flow a target needs, with the n50 air change rate.", "url": "https://craftquantities.com/calculators/insulation-efficiency/air-permeability-q50-calculator/", "json": "https://craftquantities.com/api/v1/calculators/air-permeability-q50-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-22" }, { "slug": "air-shower-nozzle-count-calculator", "category": "materials-quantities", "title": "Cleanroom Air Shower Nozzle Count Calculator", "description": "Calculate the number of air jet nozzles needed to cover a cleanroom air shower chamber at a standard spacing.", "url": "https://craftquantities.com/calculators/materials-quantities/air-shower-nozzle-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/air-shower-nozzle-count-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "airfield-pavement-edge-stress-calculator", "category": "materials-quantities", "title": "Rigid Airfield Pavement Edge Stress Screening Calculator", "description": "Calculate the Westergaard edge stress in a concrete airfield pavement slab under a single wheel load, as a preliminary screening check.", "url": "https://craftquantities.com/calculators/materials-quantities/airfield-pavement-edge-stress-calculator/", "json": "https://craftquantities.com/api/v1/calculators/airfield-pavement-edge-stress-calculator.json", "inputCount": 6, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "amperage-to-wire-gauge-calculator", "category": "electrical", "title": "Amperage to Wire Gauge Calculator", "description": "Find the minimum copper wire gauge rated to safely carry a given amp load, per standard NEC ampacity tables.", "url": "https://craftquantities.com/calculators/electrical/amperage-to-wire-gauge-calculator/", "json": "https://craftquantities.com/api/v1/calculators/amperage-to-wire-gauge-calculator.json", "inputCount": 1, "testCaseCount": 5, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "amps-to-watts-120v-calculator", "category": "electrical", "title": "Amps to Watts Calculator (120 V)", "description": "Convert a current draw in amps into watts on a standard US 120 V single-phase circuit.", "url": "https://craftquantities.com/calculators/electrical/amps-to-watts-120v-calculator/", "json": "https://craftquantities.com/api/v1/calculators/amps-to-watts-120v-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "amps-to-watts-230v-calculator", "category": "electrical", "title": "Amps to Watts Calculator (230 V)", "description": "Convert current into power on a 230 V single-phase supply, as used across the UK, Europe and Australia.", "url": "https://craftquantities.com/calculators/electrical/amps-to-watts-230v-calculator/", "json": "https://craftquantities.com/api/v1/calculators/amps-to-watts-230v-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "anchor-bolt-breakout-calculator", "category": "materials-quantities", "title": "Concrete Anchor Bolt Breakout Capacity Calculator (ACI 318)", "description": "Estimate a single cast-in or post-installed anchor's basic concrete breakout tension capacity, per ACI 318 Chapter 17.", "url": "https://craftquantities.com/calculators/materials-quantities/anchor-bolt-breakout-calculator/", "json": "https://craftquantities.com/api/v1/calculators/anchor-bolt-breakout-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-03" }, { "slug": "anchor-bolt-pattern-layout-calculator", "category": "materials-quantities", "title": "Baseplate Anchor Bolt Pattern Layout Calculator", "description": "Calculate the total number of anchor bolts in a rectangular perimeter pattern around a baseplate.", "url": "https://craftquantities.com/calculators/materials-quantities/anchor-bolt-pattern-layout-calculator/", "json": "https://craftquantities.com/api/v1/calculators/anchor-bolt-pattern-layout-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-19" }, { "slug": "anchor-proof-load-test-calculator", "category": "materials-quantities", "title": "Concrete Anchor Proof Load Test Calculator", "description": "The load a site proof test on concrete anchors is held at, and how many anchors in a lot to pull, from your specification's multiplier and sample rate.", "url": "https://craftquantities.com/calculators/materials-quantities/anchor-proof-load-test-calculator/", "json": "https://craftquantities.com/api/v1/calculators/anchor-proof-load-test-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-02" }, { "slug": "anti-fatigue-mat-calculator", "category": "materials-quantities", "title": "Anti-Fatigue Mat Flooring Area Calculator", "description": "Calculate the total anti-fatigue matting area needed for a number of standing workstations.", "url": "https://craftquantities.com/calculators/materials-quantities/anti-fatigue-mat-calculator/", "json": "https://craftquantities.com/api/v1/calculators/anti-fatigue-mat-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-30" }, { "slug": "appliance-energy-cost-calculator", "category": "electrical", "title": "Appliance Energy Cost Calculator", "description": "Estimate the annual electricity cost of running an appliance based on its wattage and daily usage.", "url": "https://craftquantities.com/calculators/electrical/appliance-energy-cost-calculator/", "json": "https://craftquantities.com/api/v1/calculators/appliance-energy-cost-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "aquarium-water-weight-calculator", "category": "materials-quantities", "title": "Aquarium Display Tank Water Weight Calculator", "description": "Calculate the total water weight of a display aquarium, for structural load verification.", "url": "https://craftquantities.com/calculators/materials-quantities/aquarium-water-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/aquarium-water-weight-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "arc-chord-offset-calculator", "category": "measurements-conversions", "title": "Arc Chord and Mid-Ordinate Check Calculator", "description": "Prove a struck arc before it is masked: the chord between check stations and the offset from that chord to the curve, for a given radius.", "url": "https://craftquantities.com/calculators/measurements-conversions/arc-chord-offset-calculator/", "json": "https://craftquantities.com/api/v1/calculators/arc-chord-offset-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "arch-brick-wedge-taper-calculator", "category": "materials-quantities", "title": "Radial Arch Brick Wedge Taper Calculator", "description": "Compute the wedge taper cut and brick count needed for a segmental or semicircular masonry arch.", "url": "https://craftquantities.com/calculators/materials-quantities/arch-brick-wedge-taper-calculator/", "json": "https://craftquantities.com/api/v1/calculators/arch-brick-wedge-taper-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "arch-rise-span-ratio-calculator", "category": "materials-quantities", "title": "Brick Arch Rise-to-Span Ratio Calculator", "description": "Classify a masonry arch's shape (flat, segmental, or semicircular) from its rise-to-span ratio.", "url": "https://craftquantities.com/calculators/materials-quantities/arch-rise-span-ratio-calculator/", "json": "https://craftquantities.com/api/v1/calculators/arch-rise-span-ratio-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-10-04" }, { "slug": "architectural-glass-weight-calculator", "category": "materials-quantities", "title": "Architectural Glass Weight Calculator", "description": "Calculate the weight of a glass panel from its area and thickness.", "url": "https://craftquantities.com/calculators/materials-quantities/architectural-glass-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/architectural-glass-weight-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "area-to-radius-calculator", "category": "measurements-conversions", "title": "Area to Radius Calculator", "description": "Work out the radius of a circle that encloses a given area — for patios, tanks, planting beds and turning circles.", "url": "https://craftquantities.com/calculators/measurements-conversions/area-to-radius-calculator/", "json": "https://craftquantities.com/api/v1/calculators/area-to-radius-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "artificial-grass-calculator", "category": "landscaping-outdoor", "title": "Artificial Grass and Synthetic Turf Calculator", "description": "How much artificial grass (synthetic turf) to buy in your market's roll widths, laid so the pile faces the view, with the joins, tape and adhesive.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/artificial-grass-calculator/", "json": "https://craftquantities.com/api/v1/calculators/artificial-grass-calculator.json", "inputCount": 7, "testCaseCount": 6, "sourceCount": 3, "lastVerified": "2026-09-21" }, { "slug": "asbestos-negative-pressure-cfm-calculator", "category": "materials-quantities", "title": "Asbestos Enclosure Negative-Pressure Airflow Calculator", "description": "Estimate the negative-air machine airflow (CFM) needed to achieve a target air-changes-per-hour rate inside an asbestos abatement containment enclosure.", "url": "https://craftquantities.com/calculators/materials-quantities/asbestos-negative-pressure-cfm-calculator/", "json": "https://craftquantities.com/api/v1/calculators/asbestos-negative-pressure-cfm-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "ashlar-stone-joint-calculator", "category": "materials-quantities", "title": "Ashlar Stone Masonry Joint Volumetrics Calculator", "description": "Estimate the cut stone units and mortar volume for an ashlar (dressed stone) masonry wall, from your stone size, joint width and wall thickness.", "url": "https://craftquantities.com/calculators/materials-quantities/ashlar-stone-joint-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ashlar-stone-joint-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-03" }, { "slug": "asphalt-crack-filler-calculator", "category": "auto-utility", "title": "Asphalt Crack Filler Calculator", "description": "Estimate how many tubes of crack filler you need for driveway or pavement cracks.", "url": "https://craftquantities.com/calculators/auto-utility/asphalt-crack-filler-calculator/", "json": "https://craftquantities.com/api/v1/calculators/asphalt-crack-filler-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "asphalt-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Asphalt Cubic Yards to Tons Calculator", "description": "Convert an asphalt volume in cubic yards into short tons for suppliers who price by weight.", "url": "https://craftquantities.com/calculators/materials-quantities/asphalt-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/asphalt-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "asphalt-driveway-calculator", "category": "auto-utility", "title": "Asphalt Driveway Calculator", "description": "Estimate the hot-mix asphalt needed for a driveway, in tons or tonnes, based on area and thickness.", "url": "https://craftquantities.com/calculators/auto-utility/asphalt-driveway-calculator/", "json": "https://craftquantities.com/api/v1/calculators/asphalt-driveway-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "asphalt-in-place-density-gmm-calculator", "category": "materials-quantities", "title": "Asphalt In-Place Density (Percent of Gmm) Calculator", "description": "Turn a pavement core's two specific gravities into percent of Gmm and the air void content that goes with it.", "url": "https://craftquantities.com/calculators/materials-quantities/asphalt-in-place-density-gmm-calculator/", "json": "https://craftquantities.com/api/v1/calculators/asphalt-in-place-density-gmm-calculator.json", "inputCount": 3, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-08-30" }, { "slug": "asphalt-millings-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Asphalt Millings Cubic Yards to Tons Calculator", "description": "Convert an asphalt millings volume into short tons for weight limits, haulage and disposal pricing.", "url": "https://craftquantities.com/calculators/materials-quantities/asphalt-millings-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/asphalt-millings-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "asphalt-millings-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Asphalt Millings Tons to Cubic Yards Calculator", "description": "Convert an asphalt millings tonnage into cubic yards to check capacity, coverage and storage.", "url": "https://craftquantities.com/calculators/materials-quantities/asphalt-millings-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/asphalt-millings-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "asphalt-pavement-esal-calculator", "category": "heavy-civil", "title": "Pavement Design ESAL Calculator", "description": "Convert a traffic stream into equivalent single axle loads over the design life — the number pavement thickness is designed against.", "url": "https://craftquantities.com/calculators/heavy-civil/asphalt-pavement-esal-calculator/", "json": "https://craftquantities.com/api/v1/calculators/asphalt-pavement-esal-calculator.json", "inputCount": 7, "testCaseCount": 5, "sourceCount": 2, "lastVerified": "2026-08-27" }, { "slug": "asphalt-prime-coat-calculator", "category": "materials-quantities", "title": "Asphalt Emulsion Prime Coat Calculator", "description": "Calculate the asphalt emulsion prime coat material needed for a granular base course before paving.", "url": "https://craftquantities.com/calculators/materials-quantities/asphalt-prime-coat-calculator/", "json": "https://craftquantities.com/api/v1/calculators/asphalt-prime-coat-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "asphalt-sealcoat-calculator", "category": "auto-utility", "title": "Asphalt Sealcoat Calculator", "description": "Estimate how many gallons or litres of driveway sealcoat you need for a squeegee-applied job.", "url": "https://craftquantities.com/calculators/auto-utility/asphalt-sealcoat-calculator/", "json": "https://craftquantities.com/api/v1/calculators/asphalt-sealcoat-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "asphalt-tack-coat-calculator", "category": "materials-quantities", "title": "Asphalt Tack Coat Calculator", "description": "Calculate the asphalt tack coat material needed between paving lifts.", "url": "https://craftquantities.com/calculators/materials-quantities/asphalt-tack-coat-calculator/", "json": "https://craftquantities.com/api/v1/calculators/asphalt-tack-coat-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "asphalt-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Asphalt Tons to Cubic Yards Calculator", "description": "Convert a quoted asphalt tonnage into cubic yards to check it covers your area.", "url": "https://craftquantities.com/calculators/materials-quantities/asphalt-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/asphalt-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "attic-baffle-count-calculator", "category": "materials-quantities", "title": "Attic Rafter Baffle/Chute Count Calculator", "description": "Calculate how many insulation baffles (rafter vent chutes) are needed along an eave, one per rafter bay.", "url": "https://craftquantities.com/calculators/materials-quantities/attic-baffle-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/attic-baffle-count-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "attic-baffle-vent-calculator", "category": "insulation-efficiency", "title": "Attic Baffle Vent Calculator", "description": "Estimate how many rafter baffle vents you need to keep soffit airflow clear above insulation.", "url": "https://craftquantities.com/calculators/insulation-efficiency/attic-baffle-vent-calculator/", "json": "https://craftquantities.com/api/v1/calculators/attic-baffle-vent-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "attic-bypass-sealing-material-calculator", "category": "insulation-efficiency", "title": "Attic Bypass Sealing Material Calculator", "description": "Turn an attic's bypass schedule (chases, soffits, housings, plate runs, penetrations, flues) into sealant tubes, foam cans, rigid board and sheet metal.", "url": "https://craftquantities.com/calculators/insulation-efficiency/attic-bypass-sealing-material-calculator/", "json": "https://craftquantities.com/api/v1/calculators/attic-bypass-sealing-material-calculator.json", "inputCount": 12, "testCaseCount": 3, "sourceCount": 4, "lastVerified": "2026-09-06" }, { "slug": "attic-fan-cfm-calculator", "category": "plumbing-hvac", "title": "Attic Fan CFM Calculator", "description": "Estimate the minimum airflow (CFM) rating needed for a power attic ventilator based on attic floor area.", "url": "https://craftquantities.com/calculators/plumbing-hvac/attic-fan-cfm-calculator/", "json": "https://craftquantities.com/api/v1/calculators/attic-fan-cfm-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "attic-insulation-upgrade-calculator", "category": "insulation-efficiency", "title": "Attic Insulation Upgrade Calculator", "description": "Find how much more blown-in insulation to add to reach your target attic R-value.", "url": "https://craftquantities.com/calculators/insulation-efficiency/attic-insulation-upgrade-calculator/", "json": "https://craftquantities.com/api/v1/calculators/attic-insulation-upgrade-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "attic-radiant-barrier-calculator", "category": "insulation-efficiency", "title": "Attic Radiant Barrier Calculator", "description": "Estimate how many rolls of reflective radiant barrier foil you need for an attic roof deck.", "url": "https://craftquantities.com/calculators/insulation-efficiency/attic-radiant-barrier-calculator/", "json": "https://craftquantities.com/api/v1/calculators/attic-radiant-barrier-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "attic-ventilation-calculator", "category": "insulation-efficiency", "title": "Attic and Loft Ventilation Calculator (Intake, Exhaust and Vent Count)", "description": "Net free vent area for an attic or cold loft by the IRC, NBC, BS 5250 or NCC, split between eaves intake and high exhaust, and the vents that provide it.", "url": "https://craftquantities.com/calculators/insulation-efficiency/attic-ventilation-calculator/", "json": "https://craftquantities.com/api/v1/calculators/attic-ventilation-calculator.json", "inputCount": 8, "testCaseCount": 12, "sourceCount": 7, "lastVerified": "2026-10-05" }, { "slug": "awg-to-mm2-calculator", "category": "electrical", "title": "AWG to mm² Wire Size Calculator", "description": "Convert American Wire Gauge to a metric conductor cross-section and back, with the nearest standard size in the other system.", "url": "https://craftquantities.com/calculators/electrical/awg-to-mm2-calculator/", "json": "https://craftquantities.com/api/v1/calculators/awg-to-mm2-calculator.json", "inputCount": 3, "testCaseCount": 5, "sourceCount": 3, "lastVerified": "2026-09-11" }, { "slug": "backer-board-calculator", "category": "renovation-construction", "title": "Tile Backer Board Calculator", "description": "Count cement backer boards, screws and joint tape for a tiled wet area.", "url": "https://craftquantities.com/calculators/renovation-construction/backer-board-calculator/", "json": "https://craftquantities.com/api/v1/calculators/backer-board-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-06" }, { "slug": "backfill-lift-count-calculator", "category": "materials-quantities", "title": "Backfill Compaction Lift Count Calculator", "description": "Compute how many compaction lifts are needed to fill a given height of structural backfill.", "url": "https://craftquantities.com/calculators/materials-quantities/backfill-lift-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/backfill-lift-count-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "backflow-preventer-velocity-calculator", "category": "materials-quantities", "title": "Backflow Preventer Discharge Velocity Calculator", "description": "Calculate the water velocity through a backflow preventer's pipe connection at a given flow rate.", "url": "https://craftquantities.com/calculators/materials-quantities/backflow-preventer-velocity-calculator/", "json": "https://craftquantities.com/api/v1/calculators/backflow-preventer-velocity-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "balcony-flashing-calculator", "category": "materials-quantities", "title": "Liquid-Applied Polyurethane Balcony Flashing Seam Calculator", "description": "Calculate the seam reinforcement/flashing material needed for a liquid-applied polyurethane balcony waterproofing system.", "url": "https://craftquantities.com/calculators/materials-quantities/balcony-flashing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/balcony-flashing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "baluster-calculator", "category": "renovation-construction", "title": "Deck Baluster Calculator", "description": "Calculate how many balusters (railing spindles) keep every gap within the guard's sphere rule: 4 in in imperial, 100 mm in metric.", "url": "https://craftquantities.com/calculators/renovation-construction/baluster-calculator/", "json": "https://craftquantities.com/api/v1/calculators/baluster-calculator.json", "inputCount": 2, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-28" }, { "slug": "bar-to-psi-calculator", "category": "plumbing-hvac", "title": "Bar to PSI Calculator", "description": "Convert a bar pressure rating into PSI for US gauges, fittings and equipment.", "url": "https://craftquantities.com/calculators/plumbing-hvac/bar-to-psi-calculator/", "json": "https://craftquantities.com/api/v1/calculators/bar-to-psi-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "bark-mulch-cubic-yards-to-tons-calculator", "category": "landscaping-outdoor", "title": "Bark Mulch Cubic Yards to Tons Calculator", "description": "Convert a bark mulch volume into short tons for ordering, disposal and transport planning.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/bark-mulch-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/bark-mulch-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "bark-mulch-tons-to-cubic-yards-calculator", "category": "landscaping-outdoor", "title": "Bark Mulch Tons to Cubic Yards Calculator", "description": "Convert a bark mulch tonnage into cubic yards to check storage, capacity and coverage.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/bark-mulch-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/bark-mulch-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "base-course-tonnage-calculator", "category": "materials-quantities", "title": "Roadway Base Course Aggregate Tonnage Calculator", "description": "Calculate the tonnage of aggregate base course material needed for a roadway.", "url": "https://craftquantities.com/calculators/materials-quantities/base-course-tonnage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/base-course-tonnage-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "baseboard-heater-btu-calculator", "category": "plumbing-hvac", "title": "Electric Baseboard Heater Sizing Calculator", "description": "Get a recommended electric baseboard heater size in watts, based on room area.", "url": "https://craftquantities.com/calculators/plumbing-hvac/baseboard-heater-btu-calculator/", "json": "https://craftquantities.com/api/v1/calculators/baseboard-heater-btu-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "baseboard-heater-length-calculator", "category": "plumbing-hvac", "title": "Baseboard Heater Length Calculator", "description": "Find the standard baseboard heater length needed to deliver a target wattage.", "url": "https://craftquantities.com/calculators/plumbing-hvac/baseboard-heater-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/baseboard-heater-length-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "baseboard-trim-calculator", "category": "renovation-construction", "title": "Baseboard & Trim Calculator", "description": "Estimate the linear feet or metres of baseboard trim needed and how many stock lengths to buy.", "url": "https://craftquantities.com/calculators/renovation-construction/baseboard-trim-calculator/", "json": "https://craftquantities.com/api/v1/calculators/baseboard-trim-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-17" }, { "slug": "basement-wall-at-rest-pressure-calculator", "category": "materials-quantities", "title": "Basement Wall At-Rest Earth Pressure Calculator (with Groundwater)", "description": "At-rest earth pressure on a propped basement wall, with surcharge and groundwater carried separately: base pressure, thrust per run and where it acts.", "url": "https://craftquantities.com/calculators/materials-quantities/basement-wall-at-rest-pressure-calculator/", "json": "https://craftquantities.com/api/v1/calculators/basement-wall-at-rest-pressure-calculator.json", "inputCount": 9, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-22" }, { "slug": "basement-waterproofing-coating-calculator", "category": "materials-quantities", "title": "Basement Wall Waterproofing Coating Coverage Calculator", "description": "Calculate the waterproofing coating needed for a basement wall based on coverage rate and number of coats.", "url": "https://craftquantities.com/calculators/materials-quantities/basement-waterproofing-coating-calculator/", "json": "https://craftquantities.com/api/v1/calculators/basement-waterproofing-coating-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "baseplate-anchor-grout-calculator", "category": "materials-quantities", "title": "Baseplate Anchor Bolt Count & Grout Pocket Volume Calculator", "description": "Calculate the number of anchor bolts needed for a column baseplate's uplift load, and the grout pocket volume beneath it.", "url": "https://craftquantities.com/calculators/materials-quantities/baseplate-anchor-grout-calculator/", "json": "https://craftquantities.com/api/v1/calculators/baseplate-anchor-grout-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "baseplate-pier-size-calculator", "category": "materials-quantities", "title": "Column Pier Size from Baseplate Edge Distance Calculator", "description": "Size a column pier from its baseplate and the concrete margin wanted outside the plate, and get the concrete for the piers, waste included.", "url": "https://craftquantities.com/calculators/materials-quantities/baseplate-pier-size-calculator/", "json": "https://craftquantities.com/api/v1/calculators/baseplate-pier-size-calculator.json", "inputCount": 6, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-20" }, { "slug": "bathroom-extract-rate-calculator", "category": "plumbing-hvac", "title": "Bathroom Extract Fan Rate and Duct Resistance Calculator", "description": "The extract rate a wet room needs, and the equivalent duct length that decides whether the fan you bought will actually deliver it.", "url": "https://craftquantities.com/calculators/plumbing-hvac/bathroom-extract-rate-calculator/", "json": "https://craftquantities.com/api/v1/calculators/bathroom-extract-rate-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-24" }, { "slug": "bathroom-remodel-cost-calculator", "category": "financial-adjacent", "title": "Bathroom Remodel Cost Calculator", "description": "Price a bathroom by fixture count and waterproofed area, with the labour weighting a small wet room really carries.", "url": "https://craftquantities.com/calculators/financial-adjacent/bathroom-remodel-cost-calculator/", "json": "https://craftquantities.com/api/v1/calculators/bathroom-remodel-cost-calculator.json", "inputCount": 9, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "battery-backup-runtime-calculator", "category": "solar-energy", "title": "Battery Backup Runtime Calculator", "description": "Estimate how long a battery backup system will power a load before depleting.", "url": "https://craftquantities.com/calculators/solar-energy/battery-backup-runtime-calculator/", "json": "https://craftquantities.com/api/v1/calculators/battery-backup-runtime-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "battery-bank-sizing-calculator", "category": "solar-energy", "title": "Battery Bank Sizing Calculator", "description": "Size a battery for a daily load and days of autonomy — with the usable capacity, not the nameplate.", "url": "https://craftquantities.com/calculators/solar-energy/battery-bank-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/battery-bank-sizing-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-08-27" }, { "slug": "beam-point-load-moment-calculator", "category": "materials-quantities", "title": "Beam and Joist Point Load Moment Calculator (Equivalent UDL)", "description": "The maximum moment in a simply supported beam or joist under a uniform load plus a point load, where it peaks, the reactions and the equivalent UDL.", "url": "https://craftquantities.com/calculators/materials-quantities/beam-point-load-moment-calculator/", "json": "https://craftquantities.com/api/v1/calculators/beam-point-load-moment-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-22" }, { "slug": "bentonite-swell-calculator", "category": "materials-quantities", "title": "Bentonite Waterproofing Swell Thickness Calculator", "description": "Calculate the hydrated (swollen) gel thickness a bentonite waterproofing panel forms when it absorbs water.", "url": "https://craftquantities.com/calculators/materials-quantities/bentonite-swell-calculator/", "json": "https://craftquantities.com/api/v1/calculators/bentonite-swell-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "birds-mouth-cut-calculator", "category": "materials-quantities", "title": "Rafter Bird's Mouth Cut Calculator", "description": "Calculate the seat cut and heel cut dimensions for a rafter's bird's mouth notch at the wall plate.", "url": "https://craftquantities.com/calculators/materials-quantities/birds-mouth-cut-calculator/", "json": "https://craftquantities.com/api/v1/calculators/birds-mouth-cut-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "blast-glazing-rating-checker", "category": "materials-quantities", "title": "Blast-Resistant Fenestration Rating Checker", "description": "Check whether a glazing's published blast hazard rating meets a project's required protection level.", "url": "https://craftquantities.com/calculators/materials-quantities/blast-glazing-rating-checker/", "json": "https://craftquantities.com/api/v1/calculators/blast-glazing-rating-checker.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "block-filler-coverage-calculator", "category": "renovation-construction", "title": "Block Filler Coverage Calculator", "description": "Work out how much block filler an open-textured masonry wall drinks on the first coat, against the data sheet's smooth-substrate rate.", "url": "https://craftquantities.com/calculators/renovation-construction/block-filler-coverage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/block-filler-coverage-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-08-30" }, { "slug": "blower-door-cfm-target-calculator", "category": "insulation-efficiency", "title": "Blower Door CFM50 Target Calculator", "description": "Find the target CFM50 blower door reading needed to hit a specific ACH50 airtightness goal.", "url": "https://craftquantities.com/calculators/insulation-efficiency/blower-door-cfm-target-calculator/", "json": "https://craftquantities.com/api/v1/calculators/blower-door-cfm-target-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "blown-insulation-bag-calculator", "category": "materials-quantities", "title": "Blown-In Insulation Bag Count Calculator", "description": "Calculate how many bags of blown-in insulation are needed for an attic or wall cavity at a target depth.", "url": "https://craftquantities.com/calculators/materials-quantities/blown-insulation-bag-calculator/", "json": "https://craftquantities.com/api/v1/calculators/blown-insulation-bag-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "board-and-batten-siding-calculator", "category": "renovation-construction", "title": "Board and Batten Siding Calculator", "description": "Estimate how many boards and battens you need for a board-and-batten siding wall.", "url": "https://craftquantities.com/calculators/renovation-construction/board-and-batten-siding-calculator/", "json": "https://craftquantities.com/api/v1/calculators/board-and-batten-siding-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "board-feet-calculator", "category": "measurements-conversions", "title": "Board Feet Calculator", "description": "Convert lumber dimensions (thickness x width x length) into board feet, the standard unit lumber is priced by.", "url": "https://craftquantities.com/calculators/measurements-conversions/board-feet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/board-feet-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "board-feet-to-cubic-feet-calculator", "category": "renovation-construction", "title": "Board Feet to Cubic Feet Calculator", "description": "Convert timber board feet into cubic feet for volume, shipping and metric comparison.", "url": "https://craftquantities.com/calculators/renovation-construction/board-feet-to-cubic-feet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/board-feet-to-cubic-feet-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "board-foot-calculator", "category": "materials-quantities", "title": "Board Foot Calculator", "description": "Work out the board feet in a piece of lumber — the unit hardwood is priced in, and the one nominal sizes hide.", "url": "https://craftquantities.com/calculators/materials-quantities/board-foot-calculator/", "json": "https://craftquantities.com/api/v1/calculators/board-foot-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "board-foot-lumber-cost-calculator", "category": "financial-adjacent", "title": "Board Foot Lumber Cost Calculator", "description": "Calculate total lumber cost from a board foot quantity and price per board foot.", "url": "https://craftquantities.com/calculators/financial-adjacent/board-foot-lumber-cost-calculator/", "json": "https://craftquantities.com/api/v1/calculators/board-foot-lumber-cost-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "boiler-makeup-water-calculator", "category": "materials-quantities", "title": "Boiler Makeup Water Calculator", "description": "Calculate the makeup water rate needed to replace system losses in a boiler/hydronic heating system.", "url": "https://craftquantities.com/calculators/materials-quantities/boiler-makeup-water-calculator/", "json": "https://craftquantities.com/api/v1/calculators/boiler-makeup-water-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "bollard-spacing-calculator", "category": "materials-quantities", "title": "Security Bollard Spacing Calculator", "description": "Calculate the number of bollards needed to protect a length of frontage at a maximum spacing.", "url": "https://craftquantities.com/calculators/materials-quantities/bollard-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/bollard-spacing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "bolt-group-shear-bearing-capacity-calculator", "category": "materials-quantities", "title": "Bolt Group Shear, Bearing and Tearout Calculator", "description": "Which of the three actually governs this connection — the shank, the steel crushing in front of the hole, or the plate tearing out to its edge.", "url": "https://craftquantities.com/calculators/materials-quantities/bolt-group-shear-bearing-capacity-calculator/", "json": "https://craftquantities.com/api/v1/calculators/bolt-group-shear-bearing-capacity-calculator.json", "inputCount": 10, "testCaseCount": 4, "sourceCount": 4, "lastVerified": "2026-08-30" }, { "slug": "boulder-weight-calculator", "category": "materials-quantities", "title": "Boulder Weight Range Calculator", "description": "The range a single boulder's weight falls in, from its three measurements and rock type: a band, since its shape and density cannot be known from outside.", "url": "https://craftquantities.com/calculators/materials-quantities/boulder-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/boulder-weight-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-15" }, { "slug": "box-fill-calculator", "category": "electrical", "title": "Electrical Box Fill Calculator (NEC 314.16, US)", "description": "Add up a US outlet or junction box's conductors, devices, clamps and grounds in NEC 314.16 volume allowances and compare them with the box's volume.", "url": "https://craftquantities.com/calculators/electrical/box-fill-calculator/", "json": "https://craftquantities.com/api/v1/calculators/box-fill-calculator.json", "inputCount": 17, "testCaseCount": 45, "sourceCount": 5, "lastVerified": "2026-10-05" }, { "slug": "breaker-size-calculator", "category": "electrical", "title": "Breaker Size Calculator", "description": "Find the smallest standard breaker rating for a load in watts or amps, with the continuous-load rule applied and the conductor ampacity it then demands.", "url": "https://craftquantities.com/calculators/electrical/breaker-size-calculator/", "json": "https://craftquantities.com/api/v1/calculators/breaker-size-calculator.json", "inputCount": 6, "testCaseCount": 5, "sourceCount": 5, "lastVerified": "2026-09-11" }, { "slug": "brick-anchor-spacing-calculator", "category": "materials-quantities", "title": "Brick Veneer Anchor Spacing Calculator", "description": "Lay out a grid of veneer anchors within standard maximum horizontal and vertical spacing limits.", "url": "https://craftquantities.com/calculators/materials-quantities/brick-anchor-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/brick-anchor-spacing-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "brick-calculator", "category": "materials-quantities", "title": "Brick Calculator", "description": "Estimate how many bricks and how much mortar you need for a wall, calculated dynamically from your brick size and mortar joint width.", "url": "https://craftquantities.com/calculators/materials-quantities/brick-calculator/", "json": "https://craftquantities.com/api/v1/calculators/brick-calculator.json", "inputCount": 7, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-03" }, { "slug": "brick-ira-calculator", "category": "materials-quantities", "title": "Brick Initial Rate of Absorption (IRA) Calculator", "description": "Compute a brick's Initial Rate of Absorption from a 1-minute water absorption test, per ASTM C67.", "url": "https://craftquantities.com/calculators/materials-quantities/brick-ira-calculator/", "json": "https://craftquantities.com/api/v1/calculators/brick-ira-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "brick-movement-joint-spacing-calculator", "category": "materials-quantities", "title": "Brick Movement Joint Spacing Calculator", "description": "How many vertical movement (expansion) joints a straight run of clay brickwork needs at a maximum spacing, where they fall, and the sealant they take.", "url": "https://craftquantities.com/calculators/materials-quantities/brick-movement-joint-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/brick-movement-joint-spacing-calculator.json", "inputCount": 4, "testCaseCount": 6, "sourceCount": 3, "lastVerified": "2026-09-26" }, { "slug": "brick-rubble-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Brick Rubble Cubic Yards to Tons Calculator", "description": "Convert a brick rubble volume into short tons for weight limits, haulage and disposal pricing.", "url": "https://craftquantities.com/calculators/materials-quantities/brick-rubble-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/brick-rubble-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "brick-rubble-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Brick Rubble Tons to Cubic Yards Calculator", "description": "Convert a brick rubble tonnage into cubic yards to check capacity, coverage and storage.", "url": "https://craftquantities.com/calculators/materials-quantities/brick-rubble-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/brick-rubble-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "bricks-to-square-feet-calculator", "category": "materials-quantities", "title": "Bricks to Square Feet Calculator", "description": "Convert a brick count into the wall face area it builds, to check a delivery or a reclaim lot.", "url": "https://craftquantities.com/calculators/materials-quantities/bricks-to-square-feet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/bricks-to-square-feet-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "btu-cooling-calculator", "category": "plumbing-hvac", "title": "BTU Cooling / AC Sizing Calculator", "description": "Get a rough estimate of the air conditioner capacity (BTU) needed for a room, adjusted for ceiling height and sun exposure.", "url": "https://craftquantities.com/calculators/plumbing-hvac/btu-cooling-calculator/", "json": "https://craftquantities.com/api/v1/calculators/btu-cooling-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "btu-to-kw-calculator", "category": "plumbing-hvac", "title": "BTU/hr to kW Calculator", "description": "Convert a US BTU per hour rating into kilowatts for sizing metric equipment and electrical supply.", "url": "https://craftquantities.com/calculators/plumbing-hvac/btu-to-kw-calculator/", "json": "https://craftquantities.com/api/v1/calculators/btu-to-kw-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "btu-to-watts-calculator", "category": "measurements-conversions", "title": "BTU/hr to Watts Calculator", "description": "Convert between BTU/hr and watts for HVAC, heater, and appliance specs.", "url": "https://craftquantities.com/calculators/measurements-conversions/btu-to-watts-calculator/", "json": "https://craftquantities.com/api/v1/calculators/btu-to-watts-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "bur-base-sheet-calculator", "category": "materials-quantities", "title": "Built-Up Roofing (BUR) Base Sheet Calculator", "description": "Calculate the base ply sheets needed for a built-up roofing system, including overlap allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/bur-base-sheet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/bur-base-sheet-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "busbar-ampacity-calculator", "category": "materials-quantities", "title": "Busbar Ampacity Calculator (Current Density Method)", "description": "Estimate a copper or aluminum busbar's current-carrying capacity from its cross-sectional dimensions and a rated current density.", "url": "https://craftquantities.com/calculators/materials-quantities/busbar-ampacity-calculator/", "json": "https://craftquantities.com/api/v1/calculators/busbar-ampacity-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "cable-railing-calculator", "category": "renovation-construction", "title": "Cable Railing Calculator", "description": "Estimate the total cable length needed for a horizontal cable railing system.", "url": "https://craftquantities.com/calculators/renovation-construction/cable-railing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cable-railing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "cable-tray-deflection-calculator", "category": "materials-quantities", "title": "Cable Tray Center-Span Deflection Calculator", "description": "Check a cable tray's calculated center-span deflection under cable load against the standard L/100 deflection limit.", "url": "https://craftquantities.com/calculators/materials-quantities/cable-tray-deflection-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cable-tray-deflection-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "cable-tray-fill-calculator", "category": "materials-quantities", "title": "Cable Tray Fill Percentage Calculator", "description": "Calculate the percentage of a cable tray's cross-sectional area occupied by cables.", "url": "https://craftquantities.com/calculators/materials-quantities/cable-tray-fill-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cable-tray-fill-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "cable-tray-loaded-weight-calculator", "category": "materials-quantities", "title": "Cable Tray Loaded Weight Per Unit Length Calculator", "description": "The load per unit length a cable tray puts on its supports: the cables, the tray, attached conduits, ice, and a worker's weight as a distributed load.", "url": "https://craftquantities.com/calculators/materials-quantities/cable-tray-loaded-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cable-tray-loaded-weight-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 4, "lastVerified": "2026-09-06" }, { "slug": "cable-tray-support-count-calculator", "category": "materials-quantities", "title": "Cable Tray Support Position Count Calculator", "description": "Count the hanger positions a containment run needs once bends, tees, crosses and expansion connectors have each been given support of their own.", "url": "https://craftquantities.com/calculators/materials-quantities/cable-tray-support-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cable-tray-support-count-calculator.json", "inputCount": 8, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-02" }, { "slug": "cable-voltage-drop-calculator", "category": "electrical", "title": "Cable Voltage Drop Calculator (mm², Copper or Aluminium)", "description": "The voltage a copper or aluminium cable loses on a run, worked from its IEC 60228 resistance at the conductor temperature, single or three phase.", "url": "https://craftquantities.com/calculators/electrical/cable-voltage-drop-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cable-voltage-drop-calculator.json", "inputCount": 8, "testCaseCount": 39, "sourceCount": 5, "lastVerified": "2026-10-05" }, { "slug": "carpet-cushion-roll-calculator", "category": "materials-quantities", "title": "Carpet Cushion Roll Calculator", "description": "Order the underlay separately from the broadloom: cushion comes on its own narrower roll, so its count never falls out of the carpet order.", "url": "https://craftquantities.com/calculators/materials-quantities/carpet-cushion-roll-calculator/", "json": "https://craftquantities.com/api/v1/calculators/carpet-cushion-roll-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "carpet-roll-length-calculator", "category": "materials-quantities", "title": "Carpet Roll Length & Waste Calculator", "description": "Calculate the length of broadloom carpet needed from a standard roll width, including seaming and pattern-match waste.", "url": "https://craftquantities.com/calculators/materials-quantities/carpet-roll-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/carpet-roll-length-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "carpet-seam-tape-calculator", "category": "materials-quantities", "title": "Carpet Seam Tape and Sealer Calculator", "description": "Take the seam plan's total length and get back rolls of hot-melt tape and tubes of latex edge sealer, with what is left on the last roll.", "url": "https://craftquantities.com/calculators/materials-quantities/carpet-seam-tape-calculator/", "json": "https://craftquantities.com/api/v1/calculators/carpet-seam-tape-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-02" }, { "slug": "castellated-beam-net-shear-calculator", "category": "materials-quantities", "title": "Castellated Beam Web Opening Net-Section Shear Calculator", "description": "Check the net-section shear capacity of a castellated/cellular steel beam at a web opening.", "url": "https://craftquantities.com/calculators/materials-quantities/castellated-beam-net-shear-calculator/", "json": "https://craftquantities.com/api/v1/calculators/castellated-beam-net-shear-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "catch-can-distribution-uniformity-calculator", "category": "landscaping-outdoor", "title": "Catch-Can Test Uniformity and Rate Calculator", "description": "A zone's measured precipitation rate and low-quarter distribution uniformity from a catch-can test, with the run-time multiplier the uniformity implies.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/catch-can-distribution-uniformity-calculator/", "json": "https://craftquantities.com/api/v1/calculators/catch-can-distribution-uniformity-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 4, "lastVerified": "2026-09-02" }, { "slug": "caulk-sealant-calculator", "category": "insulation-efficiency", "title": "Caulk & Sealant Calculator", "description": "Estimate how many tubes of caulk you need to seal the exterior trim around doors and windows.", "url": "https://craftquantities.com/calculators/insulation-efficiency/caulk-sealant-calculator/", "json": "https://craftquantities.com/api/v1/calculators/caulk-sealant-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-27" }, { "slug": "cavity-barrier-crossing-count-calculator", "category": "materials-quantities", "title": "Cavity Barrier Run and Crossing Count Calculator", "description": "How much cavity barrier a facade takes, and how many carrier crossings must be cut and sealed on the way, the labour item bills most often miss.", "url": "https://craftquantities.com/calculators/materials-quantities/cavity-barrier-crossing-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cavity-barrier-crossing-count-calculator.json", "inputCount": 10, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-20" }, { "slug": "cavity-drainage-mat-calculator", "category": "materials-quantities", "title": "Cavity Wall Drainage Mat Area Calculator", "description": "Estimate the area of drainage mat or mesh needed in a masonry veneer cavity.", "url": "https://craftquantities.com/calculators/materials-quantities/cavity-drainage-mat-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cavity-drainage-mat-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "cavity-drainage-vent-calculator", "category": "materials-quantities", "title": "Brick Veneer Cavity Drainage Vent Spacing Calculator", "description": "Calculate the number of ventilation openings needed along a brick veneer wall's drainage cavity.", "url": "https://craftquantities.com/calculators/materials-quantities/cavity-drainage-vent-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cavity-drainage-vent-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "cavity-fill-volume-calculator", "category": "materials-quantities", "title": "Cavity Wall & Stud Bay Insulation Fill Calculator", "description": "Fill volume, mass at the installed density, bags and injection holes for retrofitting a closed masonry cavity or drill-and-fill stud bays.", "url": "https://craftquantities.com/calculators/materials-quantities/cavity-fill-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cavity-fill-volume-calculator.json", "inputCount": 12, "testCaseCount": 3, "sourceCount": 10, "lastVerified": "2026-09-28" }, { "slug": "cavity-wall-weep-hole-calculator", "category": "materials-quantities", "title": "Cavity Wall Weep Hole Spacing Calculator", "description": "Estimate the number of weep holes needed along the base of a brick veneer or cavity wall.", "url": "https://craftquantities.com/calculators/materials-quantities/cavity-wall-weep-hole-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cavity-wall-weep-hole-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "cd-debris-diversion-rate-calculator", "category": "sustainability-compliance", "title": "C&D Debris Recycling Diversion Rate Calculator", "description": "The share of construction and demolition debris diverted from landfill by recycling or salvage, by weight, for waste reporting such as LEED.", "url": "https://craftquantities.com/calculators/sustainability-compliance/cd-debris-diversion-rate-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cd-debris-diversion-rate-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "ceiling-control-joint-calculator", "category": "materials-quantities", "title": "Drywall Ceiling Control Joint Spacing Calculator", "description": "Calculate how many control joints are needed to break up a large drywall ceiling run within a maximum unbroken span.", "url": "https://craftquantities.com/calculators/materials-quantities/ceiling-control-joint-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ceiling-control-joint-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "ceiling-fan-size-calculator", "category": "electrical", "title": "Ceiling Fan Size Calculator", "description": "Find the recommended ceiling fan blade diameter for your room size.", "url": "https://craftquantities.com/calculators/electrical/ceiling-fan-size-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ceiling-fan-size-calculator.json", "inputCount": 1, "testCaseCount": 5, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "ceiling-joist-linear-footage-calculator", "category": "materials-quantities", "title": "Ceiling Joist Spanning Lineal Lumber Aggregator", "description": "Estimate total linear footage of ceiling joist lumber needed given building dimensions and joist spacing.", "url": "https://craftquantities.com/calculators/materials-quantities/ceiling-joist-linear-footage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ceiling-joist-linear-footage-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "ceiling-paint-calculator", "category": "renovation-construction", "title": "Ceiling Paint Calculator", "description": "Work out the litres or gallons of paint a ceiling takes from its area, the number of coats and the spread rate on the tin.", "url": "https://craftquantities.com/calculators/renovation-construction/ceiling-paint-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ceiling-paint-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-17" }, { "slug": "ceiling-plasterboard-sheet-calculator", "category": "materials-quantities", "title": "Ceiling Plasterboard (Gypsum Board) Sheet Calculator", "description": "Calculate how many gypsum board sheets are needed to fasten directly to a ceiling's framing, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/ceiling-plasterboard-sheet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ceiling-plasterboard-sheet-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "ceiling-runner-splice-calculator", "category": "materials-quantities", "title": "Drop-Ceiling Main Runner Splice Calculator", "description": "Calculate how many splice connections are needed to join standard-length main runners across a suspended ceiling run.", "url": "https://craftquantities.com/calculators/materials-quantities/ceiling-runner-splice-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ceiling-runner-splice-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "ceiling-tile-calculator", "category": "renovation-construction", "title": "Drop Ceiling Tile Calculator", "description": "Estimate how many ceiling tiles you need for a suspended (drop) ceiling, in the panel size your market actually sells.", "url": "https://craftquantities.com/calculators/renovation-construction/ceiling-tile-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ceiling-tile-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-17" }, { "slug": "ceiling-wall-angle-linear-footage-calculator", "category": "materials-quantities", "title": "Suspended Ceiling Wall Angle Take-Off", "description": "Wall angle for a suspended ceiling's perimeter, waste included, and the stock lengths to order once every corner is counted as a run of its own.", "url": "https://craftquantities.com/calculators/materials-quantities/ceiling-wall-angle-linear-footage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ceiling-wall-angle-linear-footage-calculator.json", "inputCount": 7, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-02" }, { "slug": "celsius-to-fahrenheit-calculator", "category": "measurements-conversions", "title": "Celsius to Fahrenheit Calculator", "description": "Convert a temperature from Celsius to Fahrenheit for US datasheets and cure schedules.", "url": "https://craftquantities.com/calculators/measurements-conversions/celsius-to-fahrenheit-calculator/", "json": "https://craftquantities.com/api/v1/calculators/celsius-to-fahrenheit-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "centimeters-to-inch-fraction-calculator", "category": "measurements-conversions", "title": "Centimetres to Inch Fraction Calculator", "description": "Convert a centimetre measurement to feet, inches and the nearest tape mark — for transferring a metric measurement onto an imperial tape.", "url": "https://craftquantities.com/calculators/measurements-conversions/centimeters-to-inch-fraction-calculator/", "json": "https://craftquantities.com/api/v1/calculators/centimeters-to-inch-fraction-calculator.json", "inputCount": 2, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-11" }, { "slug": "centimeters-to-inches-calculator", "category": "measurements-conversions", "title": "Centimetres to Inches Calculator", "description": "Convert a centimetre measurement into inches, with the feet-and-inches equivalent for openings and clearances.", "url": "https://craftquantities.com/calculators/measurements-conversions/centimeters-to-inches-calculator/", "json": "https://craftquantities.com/api/v1/calculators/centimeters-to-inches-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-11" }, { "slug": "centimeters-to-millimeters-calculator", "category": "measurements-conversions", "title": "Centimetres to Millimetres Calculator", "description": "Convert centimetres to millimetres — the step where a decimal point costs a factor of ten.", "url": "https://craftquantities.com/calculators/measurements-conversions/centimeters-to-millimeters-calculator/", "json": "https://craftquantities.com/api/v1/calculators/centimeters-to-millimeters-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-11" }, { "slug": "cfm-to-cubic-meters-per-hour-calculator", "category": "measurements-conversions", "title": "CFM to Cubic Metres per Hour Calculator", "description": "Convert an airflow in CFM into cubic metres per hour for European equipment data and air change calculations.", "url": "https://craftquantities.com/calculators/measurements-conversions/cfm-to-cubic-meters-per-hour-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cfm-to-cubic-meters-per-hour-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "cfm-to-liters-per-second-calculator", "category": "measurements-conversions", "title": "CFM to Litres per Second Calculator", "description": "Convert a duct, fan or grille airflow from CFM into litres per second for a metric schedule, submittal or commissioning sheet.", "url": "https://craftquantities.com/calculators/measurements-conversions/cfm-to-liters-per-second-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cfm-to-liters-per-second-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "cfm-ventilation-calculator", "category": "plumbing-hvac", "title": "CFM Ventilation Calculator", "description": "Estimate the exhaust fan or ventilation airflow (CFM) needed for a room, based on typical air-changes-per-hour targets.", "url": "https://craftquantities.com/calculators/plumbing-hvac/cfm-ventilation-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cfm-ventilation-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "cfs-stud-deflection-calculator", "category": "materials-quantities", "title": "Cold-Formed Steel (CFS) C-Stud Deflection Checker", "description": "Check a cold-formed steel stud's calculated lateral (wind) deflection against a code deflection limit.", "url": "https://craftquantities.com/calculators/materials-quantities/cfs-stud-deflection-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cfs-stud-deflection-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "cfs-stud-spacing-calculator", "category": "materials-quantities", "title": "Cold-Formed Steel Stud Spacing & Count Calculator", "description": "Calculate the number of cold-formed steel studs needed for a wall run at standard 16 or 24 in (400 or 600 mm) on-center spacing.", "url": "https://craftquantities.com/calculators/materials-quantities/cfs-stud-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cfs-stud-spacing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "cfs-stud-wall-screw-calculator", "category": "materials-quantities", "title": "CFS Stud Wall Screw Count Calculator", "description": "Calculate total self-tapping screws needed to fasten cold-formed steel studs to top and bottom track.", "url": "https://craftquantities.com/calculators/materials-quantities/cfs-stud-wall-screw-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cfs-stud-wall-screw-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "chain-link-fence-calculator", "category": "auto-utility", "title": "Chain Link Fence Calculator", "description": "Estimate posts and fabric (mesh) needed for a chain-link fence run.", "url": "https://craftquantities.com/calculators/auto-utility/chain-link-fence-calculator/", "json": "https://craftquantities.com/api/v1/calculators/chain-link-fence-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "chain-link-fence-post-calculator", "category": "materials-quantities", "title": "Chain Link Fence Post Spacing Calculator", "description": "Calculate the number of line posts needed for a chain link fence run.", "url": "https://craftquantities.com/calculators/materials-quantities/chain-link-fence-post-calculator/", "json": "https://craftquantities.com/api/v1/calculators/chain-link-fence-post-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "change-order-cost-calculator", "category": "financial-adjacent", "title": "Change Order Cost Calculator", "description": "Calculate the total cost of a mid-project change order, including markup and admin fees.", "url": "https://craftquantities.com/calculators/financial-adjacent/change-order-cost-calculator/", "json": "https://craftquantities.com/api/v1/calculators/change-order-cost-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "chicken-coop-run-calculator", "category": "auto-utility", "title": "Chicken Coop Run Fence Calculator", "description": "Estimate the hardware cloth, height, and post count needed for a predator-proof chicken run.", "url": "https://craftquantities.com/calculators/auto-utility/chicken-coop-run-calculator/", "json": "https://craftquantities.com/api/v1/calculators/chicken-coop-run-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "chimney-chase-clearance-calculator", "category": "materials-quantities", "title": "Fireplace/Chimney Chase Framing Clearance Calculator", "description": "Calculate the required chase opening dimensions around a chimney or flue, based on the appliance's clearance-to-combustibles requirement.", "url": "https://craftquantities.com/calculators/materials-quantities/chimney-chase-clearance-calculator/", "json": "https://craftquantities.com/api/v1/calculators/chimney-chase-clearance-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "ci-fastener-count-calculator", "category": "materials-quantities", "title": "Continuous Insulation Fastener Count Calculator", "description": "Calculate the total fasteners needed to attach continuous insulation boards to a wall substrate.", "url": "https://craftquantities.com/calculators/materials-quantities/ci-fastener-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ci-fastener-count-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "ci-thermal-bridging-calculator", "category": "materials-quantities", "title": "Continuous Insulation Thermal Bridging Calculator (Z-Furring)", "description": "Calculate the effective R-value of the continuous insulation layer after accounting for thermal bridging through Z-furring or steel studs.", "url": "https://craftquantities.com/calculators/materials-quantities/ci-thermal-bridging-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ci-thermal-bridging-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "circular-pier-concrete-calculator", "category": "materials-quantities", "title": "Circular Pier / Cylinder Concrete Calculator", "description": "Estimate the concrete volume needed for round piers, columns, or bollards.", "url": "https://craftquantities.com/calculators/materials-quantities/circular-pier-concrete-calculator/", "json": "https://craftquantities.com/api/v1/calculators/circular-pier-concrete-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "circulator-pump-head-loss-calculator", "category": "materials-quantities", "title": "Hydronic Circulator Pump Head Loss Calculator", "description": "Calculate the total dynamic head a hydronic circulator pump must overcome, from friction loss rate and total equivalent pipe length.", "url": "https://craftquantities.com/calculators/materials-quantities/circulator-pump-head-loss-calculator/", "json": "https://craftquantities.com/api/v1/calculators/circulator-pump-head-loss-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "circumference-calculator", "category": "measurements-conversions", "title": "Circumference Calculator", "description": "Find the circumference and radius of a circle from its diameter, for round posts, pipes, or tanks.", "url": "https://craftquantities.com/calculators/measurements-conversions/circumference-calculator/", "json": "https://craftquantities.com/api/v1/calculators/circumference-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "clay-barrel-tile-calculator", "category": "materials-quantities", "title": "Clay Barrel Roof Tile Calculator", "description": "Calculate how many clay barrel roof tiles are needed for a roof area, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/clay-barrel-tile-calculator/", "json": "https://craftquantities.com/api/v1/calculators/clay-barrel-tile-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "clay-soil-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Clay Soil Cubic Yards to Tons Calculator", "description": "Convert a clay soil volume into short tons for ordering, haulage and storage planning.", "url": "https://craftquantities.com/calculators/materials-quantities/clay-soil-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/clay-soil-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "clay-soil-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Clay Soil Tons to Cubic Yards Calculator", "description": "Convert a clay soil tonnage into cubic yards to check coverage, capacity and storage.", "url": "https://craftquantities.com/calculators/materials-quantities/clay-soil-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/clay-soil-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "cleanroom-hepa-airflow-calculator", "category": "materials-quantities", "title": "Cleanroom HEPA Airflow & Face Velocity Calculator", "description": "Calculate the required supply airflow and HEPA filter face velocity for a cleanroom, based on a target air-changes-per-hour rate by ISO class.", "url": "https://craftquantities.com/calculators/materials-quantities/cleanroom-hepa-airflow-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cleanroom-hepa-airflow-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "climate-zone-insulation-calculator", "category": "insulation-efficiency", "title": "Insulation R-Value by Climate Zone Calculator (IECC 2021 and NBC 2020)", "description": "Minimum insulation by the 2021 IECC for a US climate zone or the 2020 NBC for a Canadian one: ceiling, walls, floor, basement, slab and window figures.", "url": "https://craftquantities.com/calculators/insulation-efficiency/climate-zone-insulation-calculator/", "json": "https://craftquantities.com/api/v1/calculators/climate-zone-insulation-calculator.json", "inputCount": 2, "testCaseCount": 19, "sourceCount": 4, "lastVerified": "2026-10-05" }, { "slug": "closet-shelving-calculator", "category": "materials-quantities", "title": "Closet Shelving Calculator", "description": "Estimate the linear feet or metres of shelving and rod material needed for a reach-in closet.", "url": "https://craftquantities.com/calculators/materials-quantities/closet-shelving-calculator/", "json": "https://craftquantities.com/api/v1/calculators/closet-shelving-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "clt-floor-panel-calculator", "category": "materials-quantities", "title": "CLT Floor Panel Grid Layer Calculator", "description": "Estimate how many cross-laminated timber (CLT) floor panels are needed to cover a given floor area.", "url": "https://craftquantities.com/calculators/materials-quantities/clt-floor-panel-calculator/", "json": "https://craftquantities.com/api/v1/calculators/clt-floor-panel-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "cmu-anchor-embedment-calculator", "category": "materials-quantities", "title": "CMU Anchor Embedment Scaling Calculator", "description": "Scale a masonry anchor's rated pull-out capacity to a different embedment depth, from its manufacturer's reference test data.", "url": "https://craftquantities.com/calculators/materials-quantities/cmu-anchor-embedment-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cmu-anchor-embedment-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-03" }, { "slug": "cmu-block-grout-calculator", "category": "materials-quantities", "title": "Concrete CMU Block Counter & Grout Infill Calculator", "description": "Estimate CMU block count and grout volume for reinforced masonry, calculated dynamically from your actual block dimensions and mortar joint width.", "url": "https://craftquantities.com/calculators/materials-quantities/cmu-block-grout-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cmu-block-grout-calculator.json", "inputCount": 9, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-26" }, { "slug": "cmu-bond-beam-block-count-calculator", "category": "materials-quantities", "title": "CMU Bond Beam Block Count Calculator", "description": "Estimate the number of special U-shaped bond beam blocks needed for reinforced CMU bond beam courses.", "url": "https://craftquantities.com/calculators/materials-quantities/cmu-bond-beam-block-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cmu-bond-beam-block-count-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "cmu-cell-grout-volume-calculator", "category": "materials-quantities", "title": "CMU Cell Grout Volume Calculator", "description": "Estimate the grout volume needed to fill a specific number of CMU cells over a given wall height.", "url": "https://craftquantities.com/calculators/materials-quantities/cmu-cell-grout-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cmu-cell-grout-volume-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "cmu-equivalent-thickness-calculator", "category": "materials-quantities", "title": "CMU Equivalent Thickness Calculator", "description": "Compute a hollow CMU block's equivalent (solid) thickness, a key input to fire-resistance rating and thermal analysis tables.", "url": "https://craftquantities.com/calculators/materials-quantities/cmu-equivalent-thickness-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cmu-equivalent-thickness-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-03" }, { "slug": "cmu-wall-self-weight-calculator", "category": "materials-quantities", "title": "CMU Wall Self-Weight Calculator", "description": "Estimate a CMU wall's total self-weight for structural dead load calculations.", "url": "https://craftquantities.com/calculators/materials-quantities/cmu-wall-self-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cmu-wall-self-weight-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "collar-tie-uplift-tension-calculator", "category": "materials-quantities", "title": "Collar Tie Wind Uplift Tension Calculator", "description": "Estimate tension force in a roof collar tie from wind uplift pressure and tributary area.", "url": "https://craftquantities.com/calculators/materials-quantities/collar-tie-uplift-tension-calculator/", "json": "https://craftquantities.com/api/v1/calculators/collar-tie-uplift-tension-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "column-formwork-pressure-calculator", "category": "materials-quantities", "title": "ACI 347 Column Formwork Pressure Calculator", "description": "Calculate the maximum lateral pressure on column formwork from ordinary (non-SCC) concrete, using the ACI 347R rate-of-placement formula.", "url": "https://craftquantities.com/calculators/materials-quantities/column-formwork-pressure-calculator/", "json": "https://craftquantities.com/api/v1/calculators/column-formwork-pressure-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "combustion-air-free-area-calculator", "category": "materials-quantities", "title": "Appliance Combustion Air Free Area Calculator (Indoor Air Method)", "description": "Calculate the minimum free area of combustion air openings for a fuel-burning appliance using the code indoor air method.", "url": "https://craftquantities.com/calculators/materials-quantities/combustion-air-free-area-calculator/", "json": "https://craftquantities.com/api/v1/calculators/combustion-air-free-area-calculator.json", "inputCount": 1, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "common-rafter-length-calculator", "category": "materials-quantities", "title": "Common Gable Rafter Length Calculator", "description": "Calculate common rafter length from building width and roof pitch, including the overhang tail.", "url": "https://craftquantities.com/calculators/materials-quantities/common-rafter-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/common-rafter-length-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-17" }, { "slug": "compost-blend-calculator", "category": "landscaping-outdoor", "title": "Compost Blend Calculator", "description": "Work out how much compost to mix into an existing bed or a soil blend to reach a target organic content.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/compost-blend-calculator/", "json": "https://craftquantities.com/api/v1/calculators/compost-blend-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "compost-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Compost Cubic Yards to Tons Calculator", "description": "Convert a compost volume into short tons for weight limits, haulage and disposal pricing.", "url": "https://craftquantities.com/calculators/materials-quantities/compost-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/compost-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "compost-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Compost Tons to Cubic Yards Calculator", "description": "Convert a compost tonnage into cubic yards to check capacity, coverage and storage.", "url": "https://craftquantities.com/calculators/materials-quantities/compost-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/compost-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "concrete-bag-calculator", "category": "materials-quantities", "title": "Concrete Bag Calculator", "description": "Estimate how many bags of pre-mixed concrete you need for fence post footings or small pours.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-bag-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-bag-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "concrete-bags-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Concrete Bags to Cubic Yards Calculator", "description": "Convert a count of 80 lb concrete bags into cubic yards to compare bagged mix against a ready-mix delivery.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-bags-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-bags-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-06" }, { "slug": "concrete-calculator", "category": "materials-quantities", "title": "Concrete Calculator", "description": "Estimate how much concrete a slab needs — in cubic yards or cubic metres, and as a count of premix bags.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "concrete-control-joint-spacing-calculator", "category": "materials-quantities", "title": "Concrete Control Joint Spacing Calculator", "description": "Find the recommended maximum spacing between control joints in a concrete slab to control cracking.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-control-joint-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-control-joint-spacing-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "concrete-curing-blanket-calculator", "category": "materials-quantities", "title": "Concrete Curing Blanket Calculator", "description": "Estimate how many insulated curing blankets you need to protect fresh concrete in cold weather.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-curing-blanket-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-curing-blanket-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "concrete-elastic-modulus-calculator", "category": "materials-quantities", "title": "Concrete Elastic Modulus Calculator (ACI 318)", "description": "Estimate a concrete mix's modulus of elasticity from its unit weight and compressive strength.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-elastic-modulus-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-elastic-modulus-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "concrete-evaporation-calculator", "category": "materials-quantities", "title": "Concrete Evaporation Rate Calculator", "description": "Estimate concrete surface moisture evaporation rate to check plastic shrinkage cracking risk before a pour.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-evaporation-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-evaporation-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-03" }, { "slug": "concrete-formwork-calculator", "category": "materials-quantities", "title": "Concrete Formwork Calculator", "description": "Estimate the edge-form board footage and surface area needed to contain a concrete slab pour.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-formwork-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-formwork-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-17" }, { "slug": "concrete-maturity-method-calculator", "category": "materials-quantities", "title": "Concrete Maturity Method Calculator (Nurse-Saul)", "description": "Compute a concrete pour's maturity index from its average curing temperature and elapsed time, per ASTM C1074.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-maturity-method-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-maturity-method-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "concrete-mix-design-calculator", "category": "materials-quantities", "title": "Concrete Mix Design Calculator — ACI 211.1 Absolute Volume Method", "description": "Fine aggregate for a concrete mix by ACI 211.1 absolute volume, from the cement, water, coarse aggregate and air chosen, with a check the design fits.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-mix-design-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-mix-design-calculator.json", "inputCount": 8, "testCaseCount": 3, "sourceCount": 4, "lastVerified": "2026-09-15" }, { "slug": "concrete-mix-ratio-calculator", "category": "materials-quantities", "title": "Concrete Mix Ratio Calculator", "description": "Break a cement:sand:gravel mix ratio (like 1:2:3) into the actual volumes and cement bags needed for hand-mixed concrete.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-mix-ratio-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-mix-ratio-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "concrete-mix-temperature-calculator", "category": "materials-quantities", "title": "Concrete Mix Temperature and Ice Substitution Calculator", "description": "Predict ready-mix temperature at the plant from each ingredient's mass and temperature, then find the ice or chilled water that brings it to target.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-mix-temperature-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-mix-temperature-calculator.json", "inputCount": 9, "testCaseCount": 2, "sourceCount": 4, "lastVerified": "2026-09-06" }, { "slug": "concrete-mpa-to-psi-calculator", "category": "materials-quantities", "title": "Concrete MPa to PSI Calculator", "description": "Convert a metric concrete strength grade into PSI for US mix specifications and testing.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-mpa-to-psi-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-mpa-to-psi-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "concrete-psi-to-mpa-calculator", "category": "materials-quantities", "title": "Concrete PSI to MPa Calculator", "description": "Convert concrete compressive strength from PSI to megapascals for metric specifications.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-psi-to-mpa-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-psi-to-mpa-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "concrete-pump-friction-loss-calculator", "category": "materials-quantities", "title": "Concrete Pump Line Friction Loss Calculator", "description": "Estimate the equivalent pumping distance and pressure loss for a concrete pump line with both horizontal run and vertical lift.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-pump-friction-loss-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-pump-friction-loss-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-03" }, { "slug": "concrete-resurfacer-calculator", "category": "materials-quantities", "title": "Concrete Resurfacer and Patch Calculator", "description": "Bags of concrete resurfacer or patching mortar for a worn slab, at the bag's coverage for your area and depth, beside the depths its maker allows.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-resurfacer-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-resurfacer-calculator.json", "inputCount": 7, "testCaseCount": 3, "sourceCount": 4, "lastVerified": "2026-10-05" }, { "slug": "concrete-rubble-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Concrete Rubble Cubic Yards to Tons Calculator", "description": "Convert a concrete rubble volume into short tons for weight limits, haulage and disposal pricing.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-rubble-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-rubble-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "concrete-rubble-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Concrete Rubble Tons to Cubic Yards Calculator", "description": "Convert a concrete rubble tonnage into cubic yards to check capacity, coverage and storage.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-rubble-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-rubble-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "concrete-slump-flow-calculator", "category": "materials-quantities", "title": "Concrete Slump Flow Test Calculator (ASTM C1611)", "description": "Classify a self-consolidating concrete (SCC) mix's flowability and viscosity from a slump flow test reading.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-slump-flow-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-slump-flow-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "concrete-steps-volume-calculator", "category": "materials-quantities", "title": "Concrete Steps Volume Calculator (Solid and Waist-Slab Flights)", "description": "The concrete in a flight of steps, solid on the ground or a cast flight on a sloping waist slab, from the riser, going, width and step count, plus waste.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-steps-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-steps-volume-calculator.json", "inputCount": 8, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-22" }, { "slug": "concrete-unit-weight-calculator", "category": "materials-quantities", "title": "Concrete Unit Weight (Density) Calculator (ASTM C138)", "description": "Compute fresh concrete's unit weight from a standard measure-volume test, per ASTM C138.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-unit-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-unit-weight-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "concrete-vibrator-insertion-spacing-calculator", "category": "materials-quantities", "title": "Concrete Poker Vibrator Insertion Spacing Calculator", "description": "Space poker (immersion) vibrator insertions so their radii overlap by your margin, with the insertions each square metre or square foot of lift takes.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-vibrator-insertion-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-vibrator-insertion-spacing-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-08-30" }, { "slug": "concrete-washout-solidifier-calculator", "category": "materials-quantities", "title": "Concrete Washout Basin Solidifier Dosage Calculator", "description": "Calculate the amount of solidifying agent needed to treat a concrete washout basin's liquid waste, based on the product's manufacturer-labeled dosage rate.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-washout-solidifier-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-washout-solidifier-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "concrete-yield-calculator", "category": "materials-quantities", "title": "Concrete Relative Yield Calculator (ASTM C138)", "description": "Check whether a concrete batch actually produced its designed volume, per ASTM C138's relative yield check.", "url": "https://craftquantities.com/calculators/materials-quantities/concrete-yield-calculator/", "json": "https://craftquantities.com/api/v1/calculators/concrete-yield-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-03" }, { "slug": "conductor-ampacity-derating-calculator", "category": "materials-quantities", "title": "Feeder Conductor Ampacity Derating Calculator", "description": "Calculate a conductor's derated ampacity after applying ambient temperature and conductor-count correction factors.", "url": "https://craftquantities.com/calculators/materials-quantities/conductor-ampacity-derating-calculator/", "json": "https://craftquantities.com/api/v1/calculators/conductor-ampacity-derating-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "conduit-bend-length-calculator", "category": "materials-quantities", "title": "EMT Conduit Bend Length Calculator", "description": "Calculate the total conduit length needed for a run including 90-degree bends.", "url": "https://craftquantities.com/calculators/materials-quantities/conduit-bend-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/conduit-bend-length-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "conduit-fill-calculator", "category": "electrical", "title": "Conduit Fill Calculator", "description": "Find the maximum number of THHN conductors that fit in a conduit, per the NEC's 40% fill rule.", "url": "https://craftquantities.com/calculators/electrical/conduit-fill-calculator/", "json": "https://craftquantities.com/api/v1/calculators/conduit-fill-calculator.json", "inputCount": 2, "testCaseCount": 5, "sourceCount": 3, "lastVerified": "2026-09-02" }, { "slug": "cone-frustum-development-calculator", "category": "materials-quantities", "title": "Cone and Frustum Flat Pattern Development Calculator", "description": "Develop the flat pattern for a rolled cone or frustum: the included angle, both radii and the slant height to mark out.", "url": "https://craftquantities.com/calculators/materials-quantities/cone-frustum-development-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cone-frustum-development-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-09-24" }, { "slug": "cone-frustum-volume-calculator", "category": "materials-quantities", "title": "Cone Frustum Volume Calculator — Hoppers and Tapered Piers", "description": "Volume of a truncated cone from its two diameters and its height, and how much the common mean-diameter shortcut under-states it.", "url": "https://craftquantities.com/calculators/materials-quantities/cone-frustum-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cone-frustum-volume-calculator.json", "inputCount": 3, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-15" }, { "slug": "consolidation-settlement-calculator", "category": "materials-quantities", "title": "Primary Consolidation Settlement Calculator", "description": "Estimate the long-term primary consolidation settlement of a compressible clay layer under a new load, per classic 1D consolidation theory.", "url": "https://craftquantities.com/calculators/materials-quantities/consolidation-settlement-calculator/", "json": "https://craftquantities.com/api/v1/calculators/consolidation-settlement-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "construction-noise-at-receptor-calculator", "category": "sustainability-compliance", "title": "Construction Plant Noise at a Neighbour Calculator (BS 5228-1 / FHWA RCNM)", "description": "Predict the noise up to three items of plant make at a neighbouring property, from each one's reference level, distance and on-time, and any screening.", "url": "https://craftquantities.com/calculators/sustainability-compliance/construction-noise-at-receptor-calculator/", "json": "https://craftquantities.com/api/v1/calculators/construction-noise-at-receptor-calculator.json", "inputCount": 11, "testCaseCount": 7, "sourceCount": 4, "lastVerified": "2026-09-21" }, { "slug": "container-fill-efficiency-calculator", "category": "materials-quantities", "title": "Debris Container Fill Efficiency Calculator", "description": "How much of a skip or roll-off's rated cube a lumpy demolition stream will really occupy, and whether cube or payload runs out first.", "url": "https://craftquantities.com/calculators/materials-quantities/container-fill-efficiency-calculator/", "json": "https://craftquantities.com/api/v1/calculators/container-fill-efficiency-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-08-30" }, { "slug": "continuous-footing-grade-beam-calculator", "category": "materials-quantities", "title": "Continuous Footing / Grade Beam Volume Calculator", "description": "Estimate the concrete volume needed for a continuous strip footing or grade beam.", "url": "https://craftquantities.com/calculators/materials-quantities/continuous-footing-grade-beam-calculator/", "json": "https://craftquantities.com/api/v1/calculators/continuous-footing-grade-beam-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "contractor-markup-calculator", "category": "financial-adjacent", "title": "Contractor Markup Calculator", "description": "Calculate the total price to charge a client by applying a markup to material and labor costs.", "url": "https://craftquantities.com/calculators/financial-adjacent/contractor-markup-calculator/", "json": "https://craftquantities.com/api/v1/calculators/contractor-markup-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "coping-cap-calculator", "category": "materials-quantities", "title": "Parapet Coping Cap Linear Footage Calculator", "description": "Calculate the coping cap material needed for a parapet wall, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/coping-cap-calculator/", "json": "https://craftquantities.com/api/v1/calculators/coping-cap-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "copper-aluminum-wire-equivalent-calculator", "category": "electrical", "title": "Copper to Aluminum Wire Size Calculator (Aluminium Equivalent, AWG and mm²)", "description": "The smallest aluminum conductor with no more resistance than a given copper one, in AWG and kcmil or mm², and how close the size below it comes.", "url": "https://craftquantities.com/calculators/electrical/copper-aluminum-wire-equivalent-calculator/", "json": "https://craftquantities.com/api/v1/calculators/copper-aluminum-wire-equivalent-calculator.json", "inputCount": 1, "testCaseCount": 37, "sourceCount": 4, "lastVerified": "2026-10-05" }, { "slug": "corrugated-decking-deflection-calculator", "category": "materials-quantities", "title": "Corrugated Metal Decking Span Deflection Checker", "description": "Check corrugated steel deck deflection against a code limit, using your deck's own effective moment of inertia.", "url": "https://craftquantities.com/calculators/materials-quantities/corrugated-decking-deflection-calculator/", "json": "https://craftquantities.com/api/v1/calculators/corrugated-decking-deflection-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "corrugated-panel-overlap-calculator", "category": "materials-quantities", "title": "Corrugated Metal Panel Side Lap Overlap Calculator", "description": "Calculate how many corrugated metal panels are needed to cover a roof width, accounting for side lap overlap.", "url": "https://craftquantities.com/calculators/materials-quantities/corrugated-panel-overlap-calculator/", "json": "https://craftquantities.com/api/v1/calculators/corrugated-panel-overlap-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "cost-per-cubic-yard-calculator", "category": "financial-adjacent", "title": "Cost Per Cubic Yard Calculator", "description": "Find the effective price per cubic yard for concrete, mulch, gravel, or any bulk material delivery.", "url": "https://craftquantities.com/calculators/financial-adjacent/cost-per-cubic-yard-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cost-per-cubic-yard-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "cost-per-linear-foot-calculator", "category": "financial-adjacent", "title": "Cost Per Linear Foot Calculator", "description": "Find the cost per linear foot for fencing, trim, gutters, or any other length-priced project.", "url": "https://craftquantities.com/calculators/financial-adjacent/cost-per-linear-foot-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cost-per-linear-foot-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "cost-per-square-foot-calculator", "category": "financial-adjacent", "title": "Cost Per Square Foot Calculator", "description": "Calculate the cost per square foot from a total project price and area — useful for comparing contractor quotes on an apples-to-apples basis.", "url": "https://craftquantities.com/calculators/financial-adjacent/cost-per-square-foot-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cost-per-square-foot-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "cost-to-build-house-calculator", "category": "financial-adjacent", "title": "Cost to Build a House Calculator", "description": "Assemble a whole-build budget: shell, externals, professional fees, prelims, contingency and tax — in the order they compound.", "url": "https://craftquantities.com/calculators/financial-adjacent/cost-to-build-house-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cost-to-build-house-calculator.json", "inputCount": 7, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "countertop-calculator", "category": "renovation-construction", "title": "Countertop Area Calculator", "description": "Calculate total countertop area, including an optional backsplash, for quoting or material ordering.", "url": "https://craftquantities.com/calculators/renovation-construction/countertop-calculator/", "json": "https://craftquantities.com/api/v1/calculators/countertop-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-25" }, { "slug": "court-line-marking-paint-calculator", "category": "materials-quantities", "title": "Sports Court Floor Line Marking Paint Calculator", "description": "Calculate the paint needed to mark playing lines on a gym or sports court floor.", "url": "https://craftquantities.com/calculators/materials-quantities/court-line-marking-paint-calculator/", "json": "https://craftquantities.com/api/v1/calculators/court-line-marking-paint-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "cove-base-roll-calculator", "category": "materials-quantities", "title": "Vinyl/Rubber Cove Base Roll Calculator", "description": "Calculate how many rolls of resilient (vinyl/rubber) cove base are needed for a room's wall perimeter.", "url": "https://craftquantities.com/calculators/materials-quantities/cove-base-roll-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cove-base-roll-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "covered-walkway-bay-spacing-calculator", "category": "materials-quantities", "title": "Pedestrian Covered Walkway Support Bay Spacing Calculator", "description": "Calculate the number of structural support bays needed for a pedestrian covered walkway/canopy at its maximum allowable bay spacing.", "url": "https://craftquantities.com/calculators/materials-quantities/covered-walkway-bay-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/covered-walkway-bay-spacing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "crack-isolation-membrane-calculator", "category": "materials-quantities", "title": "Floor Crack Isolation Membrane Coverage Calculator", "description": "Calculate how many rolls of crack isolation membrane are needed beneath a tile floor over a concrete slab.", "url": "https://craftquantities.com/calculators/materials-quantities/crack-isolation-membrane-calculator/", "json": "https://craftquantities.com/api/v1/calculators/crack-isolation-membrane-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "crane-lift-utilisation-calculator", "category": "heavy-civil", "title": "Crane Lift Utilisation Calculator", "description": "Total lifted load against the rated capacity from your load chart, as a utilisation percentage with the rigging and block included.", "url": "https://craftquantities.com/calculators/heavy-civil/crane-lift-utilisation-calculator/", "json": "https://craftquantities.com/api/v1/calculators/crane-lift-utilisation-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-08-27" }, { "slug": "crane-load-wind-force-calculator", "category": "heavy-civil", "title": "Suspended Load Wind Force and Swing Calculator", "description": "The force a gust puts on a suspended load's sail area, how far it pushes the load off vertical, and the moment that offset adds at the working radius.", "url": "https://craftquantities.com/calculators/heavy-civil/crane-load-wind-force-calculator/", "json": "https://craftquantities.com/api/v1/calculators/crane-load-wind-force-calculator.json", "inputCount": 7, "testCaseCount": 2, "sourceCount": 4, "lastVerified": "2026-08-30" }, { "slug": "crane-mat-bearing-pressure-calculator", "category": "heavy-civil", "title": "Crane Outrigger/Mat Ground-Bearing Pressure Calculator", "description": "Check the ground bearing pressure under a mobile crane outrigger pad or cribbing mat against the site's allowable bearing capacity.", "url": "https://craftquantities.com/calculators/heavy-civil/crane-mat-bearing-pressure-calculator/", "json": "https://craftquantities.com/api/v1/calculators/crane-mat-bearing-pressure-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "crawl-space-vent-calculator", "category": "materials-quantities", "title": "Crawl Space and Subfloor Vent Calculator", "description": "The net vent area a vented crawl space or suspended ground floor needs by the IRC or Approved Document C, and how many vents of a rated size that takes.", "url": "https://craftquantities.com/calculators/materials-quantities/crawl-space-vent-calculator/", "json": "https://craftquantities.com/api/v1/calculators/crawl-space-vent-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 4, "lastVerified": "2026-09-25" }, { "slug": "crawlspace-liner-calculator", "category": "materials-quantities", "title": "Crawlspace Encapsulation Liner Calculator", "description": "Calculate the vapor barrier liner needed to encapsulate a crawlspace floor and walls.", "url": "https://craftquantities.com/calculators/materials-quantities/crawlspace-liner-calculator/", "json": "https://craftquantities.com/api/v1/calculators/crawlspace-liner-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "critical-path-float-calculator", "category": "financial-adjacent", "title": "Critical Path and Float Calculator (CPM)", "description": "Link up to six activities by what must finish first, and get the programme's length, its critical path and the float every other activity has.", "url": "https://craftquantities.com/calculators/financial-adjacent/critical-path-float-calculator/", "json": "https://craftquantities.com/api/v1/calculators/critical-path-float-calculator.json", "inputCount": 16, "testCaseCount": 10, "sourceCount": 2, "lastVerified": "2026-09-22" }, { "slug": "crown-molding-calculator", "category": "renovation-construction", "title": "Crown Molding Calculator", "description": "Estimate the linear feet or metres of crown molding needed and how many stock lengths to buy.", "url": "https://craftquantities.com/calculators/renovation-construction/crown-molding-calculator/", "json": "https://craftquantities.com/api/v1/calculators/crown-molding-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 4, "lastVerified": "2026-09-17" }, { "slug": "crushed-granite-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Decomposed Granite Cubic Yards to Tons Calculator", "description": "Convert a decomposed granite volume into short tons for pricing, haulage and weight limits.", "url": "https://craftquantities.com/calculators/materials-quantities/crushed-granite-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/crushed-granite-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "crushed-granite-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Decomposed Granite Tons to Cubic Yards Calculator", "description": "Convert a decomposed granite tonnage into cubic yards to check coverage, capacity and storage.", "url": "https://craftquantities.com/calculators/materials-quantities/crushed-granite-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/crushed-granite-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "crushed-limestone-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Crushed Limestone Cubic Yards to Tons Calculator", "description": "Convert a crushed limestone volume in cubic yards into short tons for weight-based pricing and haulage.", "url": "https://craftquantities.com/calculators/materials-quantities/crushed-limestone-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/crushed-limestone-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "crushed-limestone-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Crushed Limestone Tons to Cubic Yards Calculator", "description": "Convert a crushed limestone tonnage into cubic yards to check coverage and storage space.", "url": "https://craftquantities.com/calculators/materials-quantities/crushed-limestone-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/crushed-limestone-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "cubic-feet-to-board-feet-calculator", "category": "renovation-construction", "title": "Cubic Feet to Board Feet Calculator", "description": "Convert a timber volume in cubic feet into board feet for US pricing and ordering.", "url": "https://craftquantities.com/calculators/renovation-construction/cubic-feet-to-board-feet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cubic-feet-to-board-feet-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "cubic-feet-to-cubic-meters-calculator", "category": "measurements-conversions", "title": "Cubic Feet to Cubic Metres Calculator", "description": "Convert a volume in cubic feet into cubic metres, for ordering concrete, fill and skips against a metric supplier.", "url": "https://craftquantities.com/calculators/measurements-conversions/cubic-feet-to-cubic-meters-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cubic-feet-to-cubic-meters-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-12" }, { "slug": "cubic-feet-to-cubic-yards-calculator", "category": "measurements-conversions", "title": "Cubic Feet to Cubic Yards Calculator", "description": "Convert a volume in cubic feet into cubic yards — the unit concrete, gravel and topsoil are actually sold in.", "url": "https://craftquantities.com/calculators/measurements-conversions/cubic-feet-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cubic-feet-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "cubic-feet-to-gallons-calculator", "category": "measurements-conversions", "title": "Cubic Feet to Gallons Calculator", "description": "Convert a volume in cubic feet into US gallons — for tank capacity, pond volume and water storage.", "url": "https://craftquantities.com/calculators/measurements-conversions/cubic-feet-to-gallons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cubic-feet-to-gallons-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "cubic-feet-to-liters-calculator", "category": "measurements-conversions", "title": "Cubic Feet to Litres Calculator", "description": "Convert cubic feet to litres — bagged soil and mulch, mixer drums, barrows and tanks rated in the other system.", "url": "https://craftquantities.com/calculators/measurements-conversions/cubic-feet-to-liters-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cubic-feet-to-liters-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-09-16" }, { "slug": "cubic-meters-per-hour-to-cfm-calculator", "category": "measurements-conversions", "title": "Cubic Metres per Hour to CFM Calculator", "description": "Convert an airflow in m³/h into CFM for duct sizing, face velocity checks and North American selection tables.", "url": "https://craftquantities.com/calculators/measurements-conversions/cubic-meters-per-hour-to-cfm-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cubic-meters-per-hour-to-cfm-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "cubic-meters-per-hour-to-liters-per-second-calculator", "category": "measurements-conversions", "title": "Cubic Metres per Hour to Litres per Second Calculator", "description": "Convert a flow rate in cubic metres per hour into litres per second, for sizing pipework against an hourly equipment rating.", "url": "https://craftquantities.com/calculators/measurements-conversions/cubic-meters-per-hour-to-liters-per-second-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cubic-meters-per-hour-to-liters-per-second-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-12" }, { "slug": "cubic-meters-to-cubic-feet-calculator", "category": "measurements-conversions", "title": "Cubic Metres to Cubic Feet Calculator", "description": "Convert a volume in cubic metres into cubic feet, for checking a metric delivery against measurements taken in feet.", "url": "https://craftquantities.com/calculators/measurements-conversions/cubic-meters-to-cubic-feet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cubic-meters-to-cubic-feet-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-12" }, { "slug": "cubic-meters-to-cubic-yards-calculator", "category": "measurements-conversions", "title": "Cubic Metres to Cubic Yards Calculator", "description": "Convert cubic metres to cubic yards for North American concrete and aggregate orders.", "url": "https://craftquantities.com/calculators/measurements-conversions/cubic-meters-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cubic-meters-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "cubic-yard-calculator", "category": "measurements-conversions", "title": "Cubic Yard Calculator", "description": "Work out the cubic yards in a rectangular area from its length, width and depth — the unit bulk material is ordered in.", "url": "https://craftquantities.com/calculators/measurements-conversions/cubic-yard-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cubic-yard-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "cubic-yards-from-dimensions-calculator", "category": "measurements-conversions", "title": "Cubic Yards Calculator", "description": "Convert length, width, and depth measurements directly into cubic yards, for any bulk material.", "url": "https://craftquantities.com/calculators/measurements-conversions/cubic-yards-from-dimensions-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cubic-yards-from-dimensions-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "cubic-yards-to-concrete-bags-calculator", "category": "materials-quantities", "title": "Cubic Yards to Concrete Bags Calculator", "description": "Convert a required concrete volume into the number of 80 lb bags, for small pours below a delivery minimum.", "url": "https://craftquantities.com/calculators/materials-quantities/cubic-yards-to-concrete-bags-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cubic-yards-to-concrete-bags-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "cubic-yards-to-cubic-feet-calculator", "category": "measurements-conversions", "title": "Cubic Yards to Cubic Feet Calculator", "description": "Convert a delivered cubic-yard quantity into cubic feet to check coverage over a measured area.", "url": "https://craftquantities.com/calculators/measurements-conversions/cubic-yards-to-cubic-feet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cubic-yards-to-cubic-feet-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "cubic-yards-to-cubic-meters-calculator", "category": "measurements-conversions", "title": "Cubic Yards to Cubic Metres Calculator", "description": "Convert cubic yards to cubic metres for metric specifications and international suppliers.", "url": "https://craftquantities.com/calculators/measurements-conversions/cubic-yards-to-cubic-meters-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cubic-yards-to-cubic-meters-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "culvert-deflection-calculator", "category": "heavy-civil", "title": "Flexible Culvert Pipe Deflection Calculator (Iowa/Modified Spangler Formula)", "description": "Calculate a flexible culvert pipe's expected deflection under soil cover load, using the well-established Iowa Formula.", "url": "https://craftquantities.com/calculators/heavy-civil/culvert-deflection-calculator/", "json": "https://craftquantities.com/api/v1/calculators/culvert-deflection-calculator.json", "inputCount": 6, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "culvert-pipe-length-calculator", "category": "heavy-civil", "title": "Culvert Pipe Length Calculator", "description": "Calculate the total culvert pipe length needed to span a roadway, including end treatment allowances.", "url": "https://craftquantities.com/calculators/heavy-civil/culvert-pipe-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/culvert-pipe-length-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "curb-gutter-volume-calculator", "category": "materials-quantities", "title": "Concrete Curb and Gutter Volume Calculator", "description": "Calculate the concrete volume needed for a combined curb-and-gutter roadway section.", "url": "https://craftquantities.com/calculators/materials-quantities/curb-gutter-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/curb-gutter-volume-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "curing-compound-coverage-calculator", "category": "materials-quantities", "title": "Concrete Curing Compound Coverage Calculator", "description": "Estimate the liquid membrane-forming curing compound a concrete slab surface needs, in gallons or litres.", "url": "https://craftquantities.com/calculators/materials-quantities/curing-compound-coverage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/curing-compound-coverage-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "curtain-wall-anchor-bracket-calculator", "category": "materials-quantities", "title": "Curtain Wall Anchor Bracket Spacing Calculator", "description": "Calculate the number of anchor brackets needed to attach a curtain wall system to the building structure.", "url": "https://craftquantities.com/calculators/materials-quantities/curtain-wall-anchor-bracket-calculator/", "json": "https://craftquantities.com/api/v1/calculators/curtain-wall-anchor-bracket-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "curtain-wall-condensation-checker", "category": "materials-quantities", "title": "Curtain Wall Spandrel Condensation Risk Checker", "description": "Check whether a curtain wall spandrel's interior glass surface temperature stays above the dew point under winter design conditions.", "url": "https://craftquantities.com/calculators/materials-quantities/curtain-wall-condensation-checker/", "json": "https://craftquantities.com/api/v1/calculators/curtain-wall-condensation-checker.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "curtain-wall-mullion-load-calculator", "category": "materials-quantities", "title": "Curtain Wall Mullion Tributary Dead Load Calculator", "description": "Calculate the glass dead load carried by a curtain wall mullion from its tributary area.", "url": "https://craftquantities.com/calculators/materials-quantities/curtain-wall-mullion-load-calculator/", "json": "https://craftquantities.com/api/v1/calculators/curtain-wall-mullion-load-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "curtain-wall-panel-count-calculator", "category": "materials-quantities", "title": "Curtain Wall Panel Count Calculator", "description": "Calculate how many unitized curtain wall panels are needed to cover a building facade.", "url": "https://craftquantities.com/calculators/materials-quantities/curtain-wall-panel-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/curtain-wall-panel-count-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "curved-bullnose-segment-calculator", "category": "materials-quantities", "title": "Curved Wall Bullnose Corner Bead Segment Calculator", "description": "Calculate how many bullnose corner bead segments are needed to follow a curved wall's radius.", "url": "https://craftquantities.com/calculators/materials-quantities/curved-bullnose-segment-calculator/", "json": "https://craftquantities.com/api/v1/calculators/curved-bullnose-segment-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "curved-wall-stud-layout-calculator", "category": "materials-quantities", "title": "Curved/Radius Wall Framing Stud Layout Calculator", "description": "Calculate the number of studs needed for a curved (radius) wall section at a given arc spacing.", "url": "https://craftquantities.com/calculators/materials-quantities/curved-wall-stud-layout-calculator/", "json": "https://craftquantities.com/api/v1/calculators/curved-wall-stud-layout-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "cut-fill-earthwork-balance-calculator", "category": "materials-quantities", "title": "Slope Cut-and-Fill Earthwork Balance Calculator", "description": "Check whether a site's cut material (adjusted for shrinkage) covers its fill requirement, or whether you need to import or haul off material.", "url": "https://craftquantities.com/calculators/materials-quantities/cut-fill-earthwork-balance-calculator/", "json": "https://craftquantities.com/api/v1/calculators/cut-fill-earthwork-balance-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "daily-noise-exposure-calculator", "category": "sustainability-compliance", "title": "Daily Noise Exposure (LEP,d) Calculator", "description": "Combine each task's noise level and duration into a worker's daily exposure, LEP,d, and set it beside the action and limit values the regulations name.", "url": "https://craftquantities.com/calculators/sustainability-compliance/daily-noise-exposure-calculator/", "json": "https://craftquantities.com/api/v1/calculators/daily-noise-exposure-calculator.json", "inputCount": 10, "testCaseCount": 5, "sourceCount": 4, "lastVerified": "2026-09-21" }, { "slug": "darcys-law-seepage-calculator", "category": "materials-quantities", "title": "Darcy's Law Seepage Flow Rate Calculator", "description": "Compute groundwater seepage flow rate through soil using Darcy's Law.", "url": "https://craftquantities.com/calculators/materials-quantities/darcys-law-seepage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/darcys-law-seepage-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "debris-chute-bracket-spacing-calculator", "category": "materials-quantities", "title": "Debris Chute Support Bracket Spacing Calculator", "description": "Calculate the number of support brackets needed to secure a debris chute run at the manufacturer's specified maximum spacing.", "url": "https://craftquantities.com/calculators/materials-quantities/debris-chute-bracket-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/debris-chute-bracket-spacing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "debris-chute-impact-energy-calculator", "category": "materials-quantities", "title": "High-Rise Debris Drop Chute Impact Energy Calculator", "description": "Estimate the free-fall impact energy and average impact force of debris dropped through a gravity chute, as a conservative screening estimate.", "url": "https://craftquantities.com/calculators/materials-quantities/debris-chute-impact-energy-calculator/", "json": "https://craftquantities.com/api/v1/calculators/debris-chute-impact-energy-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "debris-staging-clearance-calculator", "category": "materials-quantities", "title": "Debris Staging/Laydown Area Clearance Calculator", "description": "Calculate the total footprint needed for a debris staging or laydown pile, including a required setback clearance on all sides.", "url": "https://craftquantities.com/calculators/materials-quantities/debris-staging-clearance-calculator/", "json": "https://craftquantities.com/api/v1/calculators/debris-staging-clearance-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "debris-weight-volume-conversion-calculator", "category": "materials-quantities", "title": "Demolition Debris Weight-to-Volume Conversion Calculator", "description": "Convert a demolition debris volume into an estimated weight in tons or tonnes, using a density for the material, for loads reported by weight.", "url": "https://craftquantities.com/calculators/materials-quantities/debris-weight-volume-conversion-calculator/", "json": "https://craftquantities.com/api/v1/calculators/debris-weight-volume-conversion-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "decibel-addition-calculator", "category": "sustainability-compliance", "title": "Decibel Addition and Background Correction Calculator", "description": "Add up to six sound levels on an energy basis, or take a background level out of a measured total to find what the source produces on its own.", "url": "https://craftquantities.com/calculators/sustainability-compliance/decibel-addition-calculator/", "json": "https://craftquantities.com/api/v1/calculators/decibel-addition-calculator.json", "inputCount": 9, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-21" }, { "slug": "decimal-inches-to-fraction-calculator", "category": "measurements-conversions", "title": "Decimal Inches to Fraction Calculator (and Fraction to Decimal)", "description": "Round a decimal inch to the nearest tape mark, eighths to sixty-fourths, or turn a tape fraction into decimal inches, with millimetres beside both.", "url": "https://craftquantities.com/calculators/measurements-conversions/decimal-inches-to-fraction-calculator/", "json": "https://craftquantities.com/api/v1/calculators/decimal-inches-to-fraction-calculator.json", "inputCount": 6, "testCaseCount": 12, "sourceCount": 2, "lastVerified": "2026-10-05" }, { "slug": "deck-board-calculator", "category": "renovation-construction", "title": "Deck Board Calculator", "description": "Estimate how many deck boards you need, accounting for board width and the gap left between boards.", "url": "https://craftquantities.com/calculators/renovation-construction/deck-board-calculator/", "json": "https://craftquantities.com/api/v1/calculators/deck-board-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "deck-cost-calculator", "category": "financial-adjacent", "title": "Deck Cost Calculator", "description": "Build a deck budget from its actual parts — surface, railing, footings and stairs — rather than one rate per square metre.", "url": "https://craftquantities.com/calculators/financial-adjacent/deck-cost-calculator/", "json": "https://craftquantities.com/api/v1/calculators/deck-cost-calculator.json", "inputCount": 9, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-08-27" }, { "slug": "deck-footing-calculator", "category": "renovation-construction", "title": "Deck Footing Calculator", "description": "Estimate the minimum number of footings needed around a deck's perimeter based on standard spacing.", "url": "https://craftquantities.com/calculators/renovation-construction/deck-footing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/deck-footing-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "deck-joist-span-calculator", "category": "renovation-construction", "title": "Deck Joist Span and Size Calculator", "description": "Size a deck joist from first principles: bending and deflection at your span, spacing, load and design values, and how hard a chosen section works.", "url": "https://craftquantities.com/calculators/renovation-construction/deck-joist-span-calculator/", "json": "https://craftquantities.com/api/v1/calculators/deck-joist-span-calculator.json", "inputCount": 9, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-09-25" }, { "slug": "deck-ledger-flashing-calculator", "category": "materials-quantities", "title": "Deck Ledger Flashing Length Calculator", "description": "Calculate total ledger flashing length including end overhang (kick-out allowance) for a deck ledger board.", "url": "https://craftquantities.com/calculators/materials-quantities/deck-ledger-flashing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/deck-ledger-flashing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "deck-screws-calculator", "category": "materials-quantities", "title": "Deck Screws Calculator", "description": "Estimate how many deck screws and boxes you need based on deck area.", "url": "https://craftquantities.com/calculators/materials-quantities/deck-screws-calculator/", "json": "https://craftquantities.com/api/v1/calculators/deck-screws-calculator.json", "inputCount": 1, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "deck-stain-calculator", "category": "renovation-construction", "title": "Deck Stain Calculator", "description": "Estimate how many gallons or litres of deck stain or sealer you need to cover your deck.", "url": "https://craftquantities.com/calculators/renovation-construction/deck-stain-calculator/", "json": "https://craftquantities.com/api/v1/calculators/deck-stain-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "decorative-column-wrap-calculator", "category": "materials-quantities", "title": "Decorative Column/Pilaster Wrap Material Calculator", "description": "Calculate the surface area of decorative wrap material needed to cover a round column.", "url": "https://craftquantities.com/calculators/materials-quantities/decorative-column-wrap-calculator/", "json": "https://craftquantities.com/api/v1/calculators/decorative-column-wrap-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "degrees-to-roof-pitch-calculator", "category": "renovation-construction", "title": "Degrees to Roof Pitch Calculator", "description": "Convert a measured roof angle in degrees into the rise-over-12 pitch used by US material schedules.", "url": "https://craftquantities.com/calculators/renovation-construction/degrees-to-roof-pitch-calculator/", "json": "https://craftquantities.com/api/v1/calculators/degrees-to-roof-pitch-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "dehumidifier-pulldown-calculator", "category": "plumbing-hvac", "title": "Dehumidifier Water Removal Calculator", "description": "The water held in a room's air between its current and target humidity, in gallons or litres, and the pull-down time at your unit's real extraction rate.", "url": "https://craftquantities.com/calculators/plumbing-hvac/dehumidifier-pulldown-calculator/", "json": "https://craftquantities.com/api/v1/calculators/dehumidifier-pulldown-calculator.json", "inputCount": 7, "testCaseCount": 3, "sourceCount": 4, "lastVerified": "2026-09-02" }, { "slug": "dehumidifier-sizing-calculator", "category": "insulation-efficiency", "title": "Dehumidifier Sizing Calculator", "description": "Find the recommended dehumidifier capacity (pints/day) for a basement or room based on area and dampness level.", "url": "https://craftquantities.com/calculators/insulation-efficiency/dehumidifier-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/dehumidifier-sizing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "delay-cost-acceleration-calculator", "category": "financial-adjacent", "title": "Delay Cost and Acceleration Break-Even Calculator", "description": "What a week of delay costs once damages, prolongation and the damages cap are all in — and the most it is worth spending to recover it.", "url": "https://craftquantities.com/calculators/financial-adjacent/delay-cost-acceleration-calculator/", "json": "https://craftquantities.com/api/v1/calculators/delay-cost-acceleration-calculator.json", "inputCount": 7, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-09-02" }, { "slug": "demolition-bulk-volume-swell-calculator", "category": "materials-quantities", "title": "Demolition Bulk Volume Swell Calculator", "description": "Estimate the bulked (swelled) volume of demolished masonry or concrete debris for hauling, using typical material swell factors.", "url": "https://craftquantities.com/calculators/materials-quantities/demolition-bulk-volume-swell-calculator/", "json": "https://craftquantities.com/api/v1/calculators/demolition-bulk-volume-swell-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "design-vehicle-turning-path-calculator", "category": "heavy-civil", "title": "Design Vehicle Swept Path Calculator", "description": "The swept path of a turning vehicle: where the inside rear tyre tracks, where the front corner swings, and the band between that must stay clear.", "url": "https://craftquantities.com/calculators/heavy-civil/design-vehicle-turning-path-calculator/", "json": "https://craftquantities.com/api/v1/calculators/design-vehicle-turning-path-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-08-30" }, { "slug": "detectable-warning-panel-calculator", "category": "materials-quantities", "title": "ADA Curb Ramp Detectable Warning Panel Calculator", "description": "Calculate the number of detectable warning (truncated dome) panels needed at the base of a curb ramp.", "url": "https://craftquantities.com/calculators/materials-quantities/detectable-warning-panel-calculator/", "json": "https://craftquantities.com/api/v1/calculators/detectable-warning-panel-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "dew-point-calculator", "category": "materials-quantities", "title": "Dew Point and Relative Humidity Calculator (with the Coating Surface Check)", "description": "Dew point and humidity, with the margin above the dew point that Wattyl's and Tnemec's coating data sheets set: three Celsius (five Fahrenheit) degrees.", "url": "https://craftquantities.com/calculators/materials-quantities/dew-point-calculator/", "json": "https://craftquantities.com/api/v1/calculators/dew-point-calculator.json", "inputCount": 9, "testCaseCount": 5, "sourceCount": 5, "lastVerified": "2026-10-05" }, { "slug": "dewatering-well-yield-calculator", "category": "heavy-civil", "title": "Dewatering Well Yield Calculator (Dupuit-Forchheimer)", "description": "Estimate the steady-state pumping rate a dewatering well can sustain in an unconfined aquifer, using the Dupuit-Forchheimer equation.", "url": "https://craftquantities.com/calculators/heavy-civil/dewatering-well-yield-calculator/", "json": "https://craftquantities.com/api/v1/calculators/dewatering-well-yield-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "dhw-recirculation-flow-calculator", "category": "materials-quantities", "title": "Domestic Hot Water Recirculation Flow Calculator", "description": "Calculate the recirculation flow rate needed to offset a hot water loop's heat loss and maintain temperature.", "url": "https://craftquantities.com/calculators/materials-quantities/dhw-recirculation-flow-calculator/", "json": "https://craftquantities.com/api/v1/calculators/dhw-recirculation-flow-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "diagonal-tile-corner-waste-calculator", "category": "materials-quantities", "title": "Diagonal Tile Layout 45° Corner Cut Waste Calculator", "description": "Calculate the extra tile waste area from 45°-diagonal corner cuts around a room's perimeter.", "url": "https://craftquantities.com/calculators/materials-quantities/diagonal-tile-corner-waste-calculator/", "json": "https://craftquantities.com/api/v1/calculators/diagonal-tile-corner-waste-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "diy-vs-contractor-cost-calculator", "category": "financial-adjacent", "title": "DIY vs. Contractor Cost Calculator", "description": "Compare the true cost of doing a project yourself (materials + your time) against hiring a contractor.", "url": "https://craftquantities.com/calculators/financial-adjacent/diy-vs-contractor-cost-calculator/", "json": "https://craftquantities.com/api/v1/calculators/diy-vs-contractor-cost-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "dog-fence-wire-calculator", "category": "auto-utility", "title": "In-Ground Dog Fence Wire Calculator", "description": "Estimate how much boundary wire you need for an in-ground electric pet fence system.", "url": "https://craftquantities.com/calculators/auto-utility/dog-fence-wire-calculator/", "json": "https://craftquantities.com/api/v1/calculators/dog-fence-wire-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "domestic-water-pipe-sizing-calculator", "category": "materials-quantities", "title": "Domestic Water Pipe Sizing by Fixture Unit Calculator", "description": "Size a domestic water pipe from its fixture unit load against both limits that govern it: the velocity ceiling and the pressure at the furthest fixture.", "url": "https://craftquantities.com/calculators/materials-quantities/domestic-water-pipe-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/domestic-water-pipe-sizing-calculator.json", "inputCount": 10, "testCaseCount": 4, "sourceCount": 4, "lastVerified": "2026-09-11" }, { "slug": "door-effective-clear-width-calculator", "category": "materials-quantities", "title": "Door Effective Clear Width Calculator (Approved Document M and ADA)", "description": "Set a door's measured clear width beside the minimum Approved Document M's Table 2 or the ADA Standards give, and see the room to spare or the shortfall.", "url": "https://craftquantities.com/calculators/materials-quantities/door-effective-clear-width-calculator/", "json": "https://craftquantities.com/api/v1/calculators/door-effective-clear-width-calculator.json", "inputCount": 5, "testCaseCount": 8, "sourceCount": 2, "lastVerified": "2026-09-22" }, { "slug": "door-maneuvering-clearance-calculator", "category": "materials-quantities", "title": "ADA Door Maneuvering Clearance Calculator", "description": "The landing a door needs on the side you are standing, set by the direction of approach and by whether the door is being pushed or pulled.", "url": "https://craftquantities.com/calculators/materials-quantities/door-maneuvering-clearance-calculator/", "json": "https://craftquantities.com/api/v1/calculators/door-maneuvering-clearance-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-08-30" }, { "slug": "door-window-casing-calculator", "category": "renovation-construction", "title": "Door & Window Casing Calculator", "description": "Estimate the linear feet or metres of casing trim needed to frame door or window openings.", "url": "https://craftquantities.com/calculators/renovation-construction/door-window-casing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/door-window-casing-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-17" }, { "slug": "dormer-rafter-length-calculator", "category": "materials-quantities", "title": "Dormer Rafter Length Calculator", "description": "Calculate common rafter length for a dormer roof, including overhang, from the dormer's own width and pitch.", "url": "https://craftquantities.com/calculators/materials-quantities/dormer-rafter-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/dormer-rafter-length-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "dot-and-dab-adhesive-calculator", "category": "materials-quantities", "title": "Dot-and-Dab (Direct Bond) Drywall Adhesive Calculator", "description": "Calculate the drywall adhesive needed to dot-and-dab plasterboard directly onto a masonry wall, and the bags it comes to.", "url": "https://craftquantities.com/calculators/materials-quantities/dot-and-dab-adhesive-calculator/", "json": "https://craftquantities.com/api/v1/calculators/dot-and-dab-adhesive-calculator.json", "inputCount": 3, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-24" }, { "slug": "downspout-length-calculator", "category": "renovation-construction", "title": "Downspout Length Calculator", "description": "Estimate the total downspout pipe and elbow count needed for your gutter system.", "url": "https://craftquantities.com/calculators/renovation-construction/downspout-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/downspout-length-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "drain-pipe-slope-calculator", "category": "plumbing-hvac", "title": "Drain Pipe Slope Calculator", "description": "Find the minimum required drop for a drain pipe run, based on standard plumbing code minimum slope.", "url": "https://craftquantities.com/calculators/plumbing-hvac/drain-pipe-slope-calculator/", "json": "https://craftquantities.com/api/v1/calculators/drain-pipe-slope-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "drawing-scale-calculator", "category": "measurements-conversions", "title": "Drawing Scale Calculator (Plan to Real Size and Back)", "description": "Plan to real size and back at metric, architects' or engineers' scales, and the scale a print is really at from one dimension it states.", "url": "https://craftquantities.com/calculators/measurements-conversions/drawing-scale-calculator/", "json": "https://craftquantities.com/api/v1/calculators/drawing-scale-calculator.json", "inputCount": 8, "testCaseCount": 35, "sourceCount": 6, "lastVerified": "2026-10-05" }, { "slug": "drilled-pier-volume-calculator", "category": "materials-quantities", "title": "Drilled Pier Concrete Volume Calculator (Straight Shaft / Belled)", "description": "Estimate the concrete volume for a drilled shaft foundation pier, with an optional under-ream (bell) at the base.", "url": "https://craftquantities.com/calculators/materials-quantities/drilled-pier-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/drilled-pier-volume-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "dripline-application-rate-calculator", "category": "landscaping-outdoor", "title": "Dripline Precipitation Rate Calculator", "description": "The precipitation rate an inline dripline grid applies, from emitter discharge and the two spacings, so a drip zone can be scheduled like a spray one.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/dripline-application-rate-calculator/", "json": "https://craftquantities.com/api/v1/calculators/dripline-application-rate-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-30" }, { "slug": "driven-pile-skin-friction-calculator", "category": "materials-quantities", "title": "Driven Pile Skin Friction Capacity Calculator (Alpha Method)", "description": "Estimate a driven pile's ultimate skin friction (shaft) capacity in cohesive soil using the alpha method.", "url": "https://craftquantities.com/calculators/materials-quantities/driven-pile-skin-friction-calculator/", "json": "https://craftquantities.com/api/v1/calculators/driven-pile-skin-friction-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "driveway-calculator", "category": "auto-utility", "title": "Concrete Driveway Calculator", "description": "Estimate the concrete and gravel base volume for a new driveway, in cubic yards or cubic metres.", "url": "https://craftquantities.com/calculators/auto-utility/driveway-calculator/", "json": "https://craftquantities.com/api/v1/calculators/driveway-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "driveway-heating-cable-calculator", "category": "auto-utility", "title": "Driveway Snow Melt Cable Calculator", "description": "Estimate the length of electric snow-melt heating cable needed for a driveway or walkway.", "url": "https://craftquantities.com/calculators/auto-utility/driveway-heating-cable-calculator/", "json": "https://craftquantities.com/api/v1/calculators/driveway-heating-cable-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "driveway-throat-queue-length-calculator", "category": "heavy-civil", "title": "Driveway Throat Queue Length Calculator", "description": "How much drive has to sit between the street and the first aisle before a queue at the gate stops backing into traffic.", "url": "https://craftquantities.com/calculators/heavy-civil/driveway-throat-queue-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/driveway-throat-queue-length-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-08-30" }, { "slug": "drop-ceiling-grid-calculator", "category": "renovation-construction", "title": "Drop or Suspended Ceiling Grid Calculator — Main Tees, Cross Tees, Wall Angle and Hangers", "description": "The whole drop (suspended) ceiling grid for a room: main beams, cross tees, wall angle and hanger wires, set out with equal border panels at each wall.", "url": "https://craftquantities.com/calculators/renovation-construction/drop-ceiling-grid-calculator/", "json": "https://craftquantities.com/api/v1/calculators/drop-ceiling-grid-calculator.json", "inputCount": 7, "testCaseCount": 3, "sourceCount": 4, "lastVerified": "2026-10-05" }, { "slug": "drywall-butt-joint-backing-calculator", "category": "materials-quantities", "title": "Gypsum Board Butt Joint Backing Calculator", "description": "Calculate the total backing/blocking length needed behind unsupported drywall butt joints.", "url": "https://craftquantities.com/calculators/materials-quantities/drywall-butt-joint-backing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/drywall-butt-joint-backing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "drywall-calculator", "category": "renovation-construction", "title": "Drywall Calculator", "description": "Estimate how many drywall sheets, screws, and how much joint tape you need for a room, based on wall area and a standard waste allowance.", "url": "https://craftquantities.com/calculators/renovation-construction/drywall-calculator/", "json": "https://craftquantities.com/api/v1/calculators/drywall-calculator.json", "inputCount": 8, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-09-17" }, { "slug": "drywall-ceiling-fastening-calculator", "category": "materials-quantities", "title": "Drywall Ceiling Screw Count Calculator (Fastening Schedule)", "description": "Calculate total screws needed for a ceiling drywall installation at its (typically tighter) code-required fastening spacing.", "url": "https://craftquantities.com/calculators/materials-quantities/drywall-ceiling-fastening-calculator/", "json": "https://craftquantities.com/api/v1/calculators/drywall-ceiling-fastening-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "drywall-corner-bead-calculator", "category": "materials-quantities", "title": "Drywall Corner Bead Linear Footage Calculator", "description": "Calculate total corner bead needed for a project's outside drywall corners, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/drywall-corner-bead-calculator/", "json": "https://craftquantities.com/api/v1/calculators/drywall-corner-bead-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "drywall-joint-compound-calculator", "category": "renovation-construction", "title": "Drywall Joint Compound Calculator", "description": "Estimate how many boxes of joint compound (mud) you need to finish a given drywall area.", "url": "https://craftquantities.com/calculators/renovation-construction/drywall-joint-compound-calculator/", "json": "https://craftquantities.com/api/v1/calculators/drywall-joint-compound-calculator.json", "inputCount": 2, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-17" }, { "slug": "drywall-joint-tape-calculator", "category": "renovation-construction", "title": "Drywall Joint Tape Calculator", "description": "Work out how much jointing tape a drywall job needs, from the sheet layout and the room's angles rather than a flat rate per unit of wall area.", "url": "https://craftquantities.com/calculators/renovation-construction/drywall-joint-tape-calculator/", "json": "https://craftquantities.com/api/v1/calculators/drywall-joint-tape-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-09-17" }, { "slug": "drywall-kerf-cut-calculator", "category": "materials-quantities", "title": "Curved Wall Drywall Kerf Cut Spacing Calculator", "description": "Calculate how many kerf cuts are needed along a drywall sheet to let it bend around a curved wall.", "url": "https://craftquantities.com/calculators/materials-quantities/drywall-kerf-cut-calculator/", "json": "https://craftquantities.com/api/v1/calculators/drywall-kerf-cut-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "drywall-lamination-adhesive-calculator", "category": "materials-quantities", "title": "Double-Layer Drywall Lamination Adhesive Calculator", "description": "Calculate the laminating adhesive needed to bond a second layer of drywall directly to a base layer.", "url": "https://craftquantities.com/calculators/materials-quantities/drywall-lamination-adhesive-calculator/", "json": "https://craftquantities.com/api/v1/calculators/drywall-lamination-adhesive-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "drywall-screw-count-calculator", "category": "materials-quantities", "title": "Drywall Screw Count Calculator (Field + Perimeter Spacing)", "description": "Calculate total drywall screws needed per sheet from separate perimeter and field fastening spacing, then scale to your sheet count.", "url": "https://craftquantities.com/calculators/materials-quantities/drywall-screw-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/drywall-screw-count-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "drywall-sheets-to-square-feet-calculator", "category": "renovation-construction", "title": "Drywall Sheets to Square Feet Calculator", "description": "Convert a drywall sheet count into coverage area to check a delivery against your take-off.", "url": "https://craftquantities.com/calculators/renovation-construction/drywall-sheets-to-square-feet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/drywall-sheets-to-square-feet-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "drywall-stud-adhesive-calculator", "category": "materials-quantities", "title": "Drywall Stud Adhesive Cartridge Calculator", "description": "How many cartridges of construction adhesive it takes to board a stud wall at your bead size and stud spacing, and the field fasteners alongside.", "url": "https://craftquantities.com/calculators/materials-quantities/drywall-stud-adhesive-calculator/", "json": "https://craftquantities.com/api/v1/calculators/drywall-stud-adhesive-calculator.json", "inputCount": 7, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-09-06" }, { "slug": "drywall-texture-coverage-calculator", "category": "materials-quantities", "title": "Drywall Texture Spray Material Coverage Calculator", "description": "Calculate the texture compound needed to spray-finish a drywall wall or ceiling area.", "url": "https://craftquantities.com/calculators/materials-quantities/drywall-texture-coverage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/drywall-texture-coverage-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "duct-air-velocity-calculator", "category": "materials-quantities", "title": "Duct Air Velocity Calculator", "description": "Calculate the air velocity inside a duct given its airflow and cross-sectional area, with typical recommended velocity ranges by application.", "url": "https://craftquantities.com/calculators/materials-quantities/duct-air-velocity-calculator/", "json": "https://craftquantities.com/api/v1/calculators/duct-air-velocity-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "duct-design-friction-rate-calculator", "category": "plumbing-hvac", "title": "Duct Design Friction Rate Calculator (ACCA Manual D)", "description": "The friction rate to size ducts at under ACCA Manual D: blower static pressure less the component losses, spread over the longest supply and return runs.", "url": "https://craftquantities.com/calculators/plumbing-hvac/duct-design-friction-rate-calculator/", "json": "https://craftquantities.com/api/v1/calculators/duct-design-friction-rate-calculator.json", "inputCount": 8, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-22" }, { "slug": "duct-fitting-equivalent-length-calculator", "category": "materials-quantities", "title": "HVAC Duct Fitting Equivalent Length Calculator", "description": "Add the equivalent straight-duct length of a run's elbows and tees to its measured length, for estimating the total system pressure drop.", "url": "https://craftquantities.com/calculators/materials-quantities/duct-fitting-equivalent-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/duct-fitting-equivalent-length-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "duct-hanger-spacing-calculator", "category": "materials-quantities", "title": "HVAC Duct Hanger Support Spacing Calculator", "description": "Calculate the number of hangers needed to support a duct run at its required maximum spacing.", "url": "https://craftquantities.com/calculators/materials-quantities/duct-hanger-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/duct-hanger-spacing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "duct-insulation-wrap-calculator", "category": "materials-quantities", "title": "Duct Insulation Wrap Area Calculator", "description": "Calculate the insulation wrap material needed for a rectangular or round duct run, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/duct-insulation-wrap-calculator/", "json": "https://craftquantities.com/api/v1/calculators/duct-insulation-wrap-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "duct-leakage-class-calculator", "category": "materials-quantities", "title": "SMACNA Duct Leakage Class Allowable Leakage Calculator", "description": "Calculate the maximum allowable duct system leakage rate for a given SMACNA Leakage Class, test pressure, and duct surface area.", "url": "https://craftquantities.com/calculators/materials-quantities/duct-leakage-class-calculator/", "json": "https://craftquantities.com/api/v1/calculators/duct-leakage-class-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "duct-sealing-mastic-calculator", "category": "insulation-efficiency", "title": "Duct Sealing Mastic Calculator", "description": "Estimate how much duct mastic sealant you need to seal your ductwork's seams and joints.", "url": "https://craftquantities.com/calculators/insulation-efficiency/duct-sealing-mastic-calculator/", "json": "https://craftquantities.com/api/v1/calculators/duct-sealing-mastic-calculator.json", "inputCount": 2, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-17" }, { "slug": "duct-silencer-insertion-loss-calculator", "category": "materials-quantities", "title": "HVAC Duct Silencer Cumulative Insertion Loss Calculator", "description": "Estimate the total sound attenuation from a series of duct silencers or lined duct sections, by summing their rated insertion losses.", "url": "https://craftquantities.com/calculators/materials-quantities/duct-silencer-insertion-loss-calculator/", "json": "https://craftquantities.com/api/v1/calculators/duct-silencer-insertion-loss-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "duct-size-calculator", "category": "plumbing-hvac", "title": "Duct Size Calculator", "description": "Size a round or rectangular duct for a required airflow at a target velocity, with the noise threshold shown.", "url": "https://craftquantities.com/calculators/plumbing-hvac/duct-size-calculator/", "json": "https://craftquantities.com/api/v1/calculators/duct-size-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-06" }, { "slug": "dumpster-rental-cost-calculator", "category": "materials-quantities", "title": "Dumpster/Container Rental Duration Cost Calculator", "description": "Calculate the total cost of a dumpster or roll-off container rental, based on the hauler's daily rate and haul/delivery fee.", "url": "https://craftquantities.com/calculators/materials-quantities/dumpster-rental-cost-calculator/", "json": "https://craftquantities.com/api/v1/calculators/dumpster-rental-cost-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "dumpster-size-selector-calculator", "category": "materials-quantities", "title": "Dumpster/Skip Container Size Selector", "description": "Determine the smallest standard dumpster/skip size that fits your estimated debris volume, accounting for irregular packing.", "url": "https://craftquantities.com/calculators/materials-quantities/dumpster-size-selector-calculator/", "json": "https://craftquantities.com/api/v1/calculators/dumpster-size-selector-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "dust-suppression-water-calculator", "category": "materials-quantities", "title": "Jobsite Dust Suppression Water Truck Application Calculator", "description": "Calculate the total water volume and number of water truck loads needed to apply dust suppression across a jobsite area.", "url": "https://craftquantities.com/calculators/materials-quantities/dust-suppression-water-calculator/", "json": "https://craftquantities.com/api/v1/calculators/dust-suppression-water-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "earned-value-management-calculator", "category": "financial-adjacent", "title": "Earned Value Management (EVM) Calculator", "description": "CPI, SPI, variances and a forecast at completion from planned value, earned value and actual cost.", "url": "https://craftquantities.com/calculators/financial-adjacent/earned-value-management-calculator/", "json": "https://craftquantities.com/api/v1/calculators/earned-value-management-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-06" }, { "slug": "edge-trim-linear-footage-calculator", "category": "materials-quantities", "title": "Drywall J-Bead/L-Bead Edge Trim Calculator", "description": "Calculate total J-bead or L-bead edge trim needed for exposed drywall edges, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/edge-trim-linear-footage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/edge-trim-linear-footage-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "eifs-finish-coat-coverage-calculator", "category": "materials-quantities", "title": "EIFS Finish and Primer Pail Count Calculator", "description": "Turn an elevation's net area into pails of EIFS finish and primer, using the coverage rate published for the aggregate grade you specified.", "url": "https://craftquantities.com/calculators/materials-quantities/eifs-finish-coat-coverage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/eifs-finish-coat-coverage-calculator.json", "inputCount": 6, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "eifs-foam-adhesive-calculator", "category": "materials-quantities", "title": "EIFS Foam Board Adhesive Coverage Calculator", "description": "Calculate the adhesive needed to attach EIFS foam insulation board to the substrate.", "url": "https://craftquantities.com/calculators/materials-quantities/eifs-foam-adhesive-calculator/", "json": "https://craftquantities.com/api/v1/calculators/eifs-foam-adhesive-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "eifs-impact-mesh-zone-calculator", "category": "materials-quantities", "title": "EIFS Impact-Resistant Mesh Reinforcement Zone Calculator", "description": "Calculate the area of heavy-duty impact-resistant mesh needed at a building's high-impact ground-floor zone.", "url": "https://craftquantities.com/calculators/materials-quantities/eifs-impact-mesh-zone-calculator/", "json": "https://craftquantities.com/api/v1/calculators/eifs-impact-mesh-zone-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "eifs-insulation-thickness-calculator", "category": "materials-quantities", "title": "EIFS Insulation Board Thickness Calculator", "description": "Calculate the EIFS foam insulation board thickness needed to achieve a target R-value.", "url": "https://craftquantities.com/calculators/materials-quantities/eifs-insulation-thickness-calculator/", "json": "https://craftquantities.com/api/v1/calculators/eifs-insulation-thickness-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "eifs-mesh-consumption-calculator", "category": "materials-quantities", "title": "EIFS Base Coat Reinforcing Mesh Consumption Calculator", "description": "Calculate the fiberglass reinforcing mesh needed for an EIFS base coat, including seam overlap.", "url": "https://craftquantities.com/calculators/materials-quantities/eifs-mesh-consumption-calculator/", "json": "https://craftquantities.com/api/v1/calculators/eifs-mesh-consumption-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "eifs-mesh-roll-calculator", "category": "materials-quantities", "title": "EIFS Reinforcing Mesh Roll Count Calculator", "description": "Calculate how many rolls of fiberglass reinforcing mesh are needed for an EIFS wall, including seam overlap.", "url": "https://craftquantities.com/calculators/materials-quantities/eifs-mesh-roll-calculator/", "json": "https://craftquantities.com/api/v1/calculators/eifs-mesh-roll-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "electrical-load-calculator", "category": "electrical", "title": "Electrical Circuit Load Calculator", "description": "Check how much of a circuit's safe capacity your connected devices are using, based on the NEC 80% continuous-load rule.", "url": "https://craftquantities.com/calculators/electrical/electrical-load-calculator/", "json": "https://craftquantities.com/api/v1/calculators/electrical-load-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "electrical-panel-load-calculator", "category": "electrical", "title": "Electrical Panel Load Calculator (NEC Service Sizing)", "description": "Size a dwelling's electrical service by NEC Article 220's standard and optional methods, with the standard service rating that covers the one you choose.", "url": "https://craftquantities.com/calculators/electrical/electrical-panel-load-calculator/", "json": "https://craftquantities.com/api/v1/calculators/electrical-panel-load-calculator.json", "inputCount": 11, "testCaseCount": 5, "sourceCount": 10, "lastVerified": "2026-09-11" }, { "slug": "electrical-room-heat-load-calculator", "category": "materials-quantities", "title": "Electrical Room Transformer Heat Load Calculator", "description": "Estimate the heat dissipated into an electrical room by a dry-type transformer, for HVAC sizing purposes.", "url": "https://craftquantities.com/calculators/materials-quantities/electrical-room-heat-load-calculator/", "json": "https://craftquantities.com/api/v1/calculators/electrical-room-heat-load-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "electrical-working-clearance-calculator", "category": "materials-quantities", "title": "Electrical Equipment Working Clearance Space Calculator", "description": "Calculate the required clear floor space in front of electrical equipment per NEC 110.26 working clearance rules.", "url": "https://craftquantities.com/calculators/materials-quantities/electrical-working-clearance-calculator/", "json": "https://craftquantities.com/api/v1/calculators/electrical-working-clearance-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "elevator-hoistway-sizing-calculator", "category": "materials-quantities", "title": "Elevator Hoistway Shaft Sizing Calculator", "description": "Calculate the required hoistway plan dimensions from the elevator car size and manufacturer clearance allowances.", "url": "https://craftquantities.com/calculators/materials-quantities/elevator-hoistway-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/elevator-hoistway-sizing-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "embodied-carbon-comparison-calculator", "category": "sustainability-compliance", "title": "Structural Material Carbon Comparison Calculator", "description": "Compare the cradle-to-gate carbon of two structural options on the same job, per unit of mass.", "url": "https://craftquantities.com/calculators/sustainability-compliance/embodied-carbon-comparison-calculator/", "json": "https://craftquantities.com/api/v1/calculators/embodied-carbon-comparison-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-08-27" }, { "slug": "embodied-carbon-concrete-calculator", "category": "sustainability-compliance", "title": "Embodied Carbon in Concrete Calculator", "description": "Cradle-to-gate (A1-A3) carbon for a concrete element, and what replacing cement with GGBS or fly ash actually saves.", "url": "https://craftquantities.com/calculators/sustainability-compliance/embodied-carbon-concrete-calculator/", "json": "https://craftquantities.com/api/v1/calculators/embodied-carbon-concrete-calculator.json", "inputCount": 5, "testCaseCount": 5, "sourceCount": 3, "lastVerified": "2026-09-05" }, { "slug": "emergency-lighting-spacing-calculator", "category": "electrical", "title": "Emergency Escape Lighting Spacing Calculator", "description": "How many emergency luminaires an escape route needs: the spacing that holds EN 1838's minimum on its centre line, plus one at each point of emphasis.", "url": "https://craftquantities.com/calculators/electrical/emergency-lighting-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/emergency-lighting-spacing-calculator.json", "inputCount": 4, "testCaseCount": 5, "sourceCount": 3, "lastVerified": "2026-09-02" }, { "slug": "epdm-roll-area-calculator", "category": "materials-quantities", "title": "EPDM Single-Ply Roofing Roll Calculator", "description": "Calculate how many rolls of EPDM single-ply membrane are needed for a roof area.", "url": "https://craftquantities.com/calculators/materials-quantities/epdm-roll-area-calculator/", "json": "https://craftquantities.com/api/v1/calculators/epdm-roll-area-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "epdm-seam-tape-calculator", "category": "materials-quantities", "title": "EPDM Seam Adhesive/Tape Linear Footage Calculator", "description": "Calculate the seam tape or adhesive needed for an EPDM single-ply roofing membrane's seams, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/epdm-seam-tape-calculator/", "json": "https://craftquantities.com/api/v1/calculators/epdm-seam-tape-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "epoxy-floor-coating-calculator", "category": "materials-quantities", "title": "Epoxy Floor Coating Calculator", "description": "Estimate how many DIY epoxy kits you need to coat a garage or basement floor.", "url": "https://craftquantities.com/calculators/materials-quantities/epoxy-floor-coating-calculator/", "json": "https://craftquantities.com/api/v1/calculators/epoxy-floor-coating-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "epoxy-flooring-coverage-calculator", "category": "materials-quantities", "title": "Epoxy Flooring Coating Coverage Calculator", "description": "Calculate the epoxy coating material needed for a floor, based on area, coverage rate, and number of coats.", "url": "https://craftquantities.com/calculators/materials-quantities/epoxy-flooring-coverage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/epoxy-flooring-coverage-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-27" }, { "slug": "epoxy-primer-profile-coverage-calculator", "category": "materials-quantities", "title": "Epoxy Primer Coverage Over a Profiled Slab Calculator", "description": "Derate an epoxy primer's data sheet coverage for the concrete surface profile it goes onto, because that rate was measured on a smooth slab.", "url": "https://craftquantities.com/calculators/materials-quantities/epoxy-primer-profile-coverage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/epoxy-primer-profile-coverage-calculator.json", "inputCount": 5, "testCaseCount": 5, "sourceCount": 2, "lastVerified": "2026-09-20" }, { "slug": "equal-spacing-calculator", "category": "measurements-conversions", "title": "Equal Spacing Calculator (Balusters or Spindles, Posts, Battens)", "description": "Space balusters, posts, battens or fixings equally: the fewest that keep every gap or centre under your maximum, and each mark from one end.", "url": "https://craftquantities.com/calculators/measurements-conversions/equal-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/equal-spacing-calculator.json", "inputCount": 8, "testCaseCount": 5, "sourceCount": 3, "lastVerified": "2026-10-05" }, { "slug": "equipment-rental-vs-buy-calculator", "category": "financial-adjacent", "title": "Equipment Rental vs. Buy Calculator", "description": "Find the break-even number of rental days where buying a tool outright becomes cheaper than renting.", "url": "https://craftquantities.com/calculators/financial-adjacent/equipment-rental-vs-buy-calculator/", "json": "https://craftquantities.com/api/v1/calculators/equipment-rental-vs-buy-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-16" }, { "slug": "equivalent-round-duct-diameter-calculator", "category": "materials-quantities", "title": "Rectangular-to-Round Equivalent Duct Diameter Calculator", "description": "Calculate the round duct diameter that delivers equivalent airflow capacity to a given rectangular duct cross-section, using the Huebscher equation.", "url": "https://craftquantities.com/calculators/materials-quantities/equivalent-round-duct-diameter-calculator/", "json": "https://craftquantities.com/api/v1/calculators/equivalent-round-duct-diameter-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "erosion-control-blanket-calculator", "category": "heavy-civil", "title": "Erosion Control Blanket Roll and Staple Calculator", "description": "Rolls and staples for a slope face, counted against the true face area rather than the plan area a drawing shows.", "url": "https://craftquantities.com/calculators/heavy-civil/erosion-control-blanket-calculator/", "json": "https://craftquantities.com/api/v1/calculators/erosion-control-blanket-calculator.json", "inputCount": 9, "testCaseCount": 2, "sourceCount": 4, "lastVerified": "2026-09-03" }, { "slug": "erv-hrv-sizing-calculator", "category": "insulation-efficiency", "title": "ERV/HRV Sizing Calculator", "description": "Estimate the required continuous ventilation rate (CFM or L/s) for a whole-house ERV or HRV, per the ASHRAE 62.2 formula.", "url": "https://craftquantities.com/calculators/insulation-efficiency/erv-hrv-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/erv-hrv-sizing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "erv-sensible-recovery-calculator", "category": "materials-quantities", "title": "ERV/HRV Sensible Energy Recovery Calculator", "description": "Calculate the sensible heat energy recovered by an energy/heat recovery ventilator, based on its rated sensible recovery effectiveness.", "url": "https://craftquantities.com/calculators/materials-quantities/erv-sensible-recovery-calculator/", "json": "https://craftquantities.com/api/v1/calculators/erv-sensible-recovery-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "escalator-wellway-opening-calculator", "category": "materials-quantities", "title": "Escalator Wellway Floor Opening Length Calculator", "description": "Calculate the floor opening length needed for an escalator, from its vertical rise and standard incline angle.", "url": "https://craftquantities.com/calculators/materials-quantities/escalator-wellway-opening-calculator/", "json": "https://craftquantities.com/api/v1/calculators/escalator-wellway-opening-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "escape-route-width-calculator", "category": "materials-quantities", "title": "Occupant Load and Escape Route Width Calculator", "description": "How many people a floor holds, and how wide each way out must be once the largest is discounted, since a fire may block the exit someone would use.", "url": "https://craftquantities.com/calculators/materials-quantities/escape-route-width-calculator/", "json": "https://craftquantities.com/api/v1/calculators/escape-route-width-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-23" }, { "slug": "ev-charger-circuit-calculator", "category": "electrical", "title": "EV Charger Circuit Calculator", "description": "Find the minimum breaker size for a Level 2 EV charger circuit, based on the NEC's 125% continuous-load rule.", "url": "https://craftquantities.com/calculators/electrical/ev-charger-circuit-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ev-charger-circuit-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "ev-charging-cost-calculator", "category": "electrical", "title": "EV Home Charging Cost Calculator", "description": "Estimate the cost per full charge and per mile of charging an electric vehicle at home.", "url": "https://craftquantities.com/calculators/electrical/ev-charging-cost-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ev-charging-cost-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "excavation-sloping-setback-calculator", "category": "materials-quantities", "title": "Excavation Sloping/Benching Setback Calculator", "description": "Calculate the minimum horizontal setback for a sloped excavation wall, using OSHA's maximum allowable slope ratios by soil type.", "url": "https://craftquantities.com/calculators/materials-quantities/excavation-sloping-setback-calculator/", "json": "https://craftquantities.com/api/v1/calculators/excavation-sloping-setback-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "excavation-strut-load-calculator", "category": "materials-quantities", "title": "Excavation Bracing Strut Load Calculator", "description": "Estimate the axial load on a single strut in a braced excavation, from a design apparent earth pressure and the strut's tributary area.", "url": "https://craftquantities.com/calculators/materials-quantities/excavation-strut-load-calculator/", "json": "https://craftquantities.com/api/v1/calculators/excavation-strut-load-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "expansion-joint-filler-calculator", "category": "materials-quantities", "title": "Concrete Expansion Joint Filler Calculator", "description": "Estimate the sealant or filler volume needed for a concrete expansion joint.", "url": "https://craftquantities.com/calculators/materials-quantities/expansion-joint-filler-calculator/", "json": "https://craftquantities.com/api/v1/calculators/expansion-joint-filler-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-03" }, { "slug": "expansion-tank-sizing-calculator", "category": "plumbing-hvac", "title": "Thermal Expansion Tank Sizing Calculator", "description": "Estimate the minimum acceptance volume needed for a water heater's thermal expansion tank.", "url": "https://craftquantities.com/calculators/plumbing-hvac/expansion-tank-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/expansion-tank-sizing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "extension-cord-gauge-calculator", "category": "electrical", "title": "Extension Cord Gauge Calculator", "description": "Find the thinnest extension cord gauge rated for your tool's amp draw that also keeps voltage drop under 3% over the cord length.", "url": "https://craftquantities.com/calculators/electrical/extension-cord-gauge-calculator/", "json": "https://craftquantities.com/api/v1/calculators/extension-cord-gauge-calculator.json", "inputCount": 3, "testCaseCount": 5, "sourceCount": 3, "lastVerified": "2026-09-02" }, { "slug": "extension-ladder-height-calculator", "category": "auto-utility", "title": "Extension Ladder Size Calculator", "description": "The shortest extension ladder that reaches a given height, with its foot set out a quarter of its working length as OSHA's ladder rule asks.", "url": "https://craftquantities.com/calculators/auto-utility/extension-ladder-height-calculator/", "json": "https://craftquantities.com/api/v1/calculators/extension-ladder-height-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-10-05" }, { "slug": "exterior-paint-calculator", "category": "renovation-construction", "title": "Exterior Paint Calculator", "description": "Estimate how many gallons or litres of exterior paint you need, accounting for rougher-surface coverage rates.", "url": "https://craftquantities.com/calculators/renovation-construction/exterior-paint-calculator/", "json": "https://craftquantities.com/api/v1/calculators/exterior-paint-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "external-stepped-access-calculator", "category": "materials-quantities", "title": "External Stepped Access Calculator (Approved Document M)", "description": "Steps, flights and landings for an external stepped approach from the rise it climbs, each step's rise and going set beside Approved Document M's ranges.", "url": "https://craftquantities.com/calculators/materials-quantities/external-stepped-access-calculator/", "json": "https://craftquantities.com/api/v1/calculators/external-stepped-access-calculator.json", "inputCount": 3, "testCaseCount": 6, "sourceCount": 1, "lastVerified": "2026-09-22" }, { "slug": "fahrenheit-to-celsius-calculator", "category": "measurements-conversions", "title": "Fahrenheit to Celsius Calculator", "description": "Convert a temperature from Fahrenheit to Celsius for metric specifications and datasheets.", "url": "https://craftquantities.com/calculators/measurements-conversions/fahrenheit-to-celsius-calculator/", "json": "https://craftquantities.com/api/v1/calculators/fahrenheit-to-celsius-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "fascia-board-calculator", "category": "renovation-construction", "title": "Fascia Board Calculator", "description": "Estimate how many fascia boards you need to cover a roofline's eave length.", "url": "https://craftquantities.com/calculators/renovation-construction/fascia-board-calculator/", "json": "https://craftquantities.com/api/v1/calculators/fascia-board-calculator.json", "inputCount": 3, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-17" }, { "slug": "feet-and-inches-calculator", "category": "measurements-conversions", "title": "Feet and Inches Calculator (Add, Subtract, Multiply, Divide)", "description": "Add, subtract, multiply or divide feet, inches and fractions, answered as a tape reading to 1/8, 1/16, 1/32 or 1/64 in with decimal feet, inches and mm.", "url": "https://craftquantities.com/calculators/measurements-conversions/feet-and-inches-calculator/", "json": "https://craftquantities.com/api/v1/calculators/feet-and-inches-calculator.json", "inputCount": 13, "testCaseCount": 9, "sourceCount": 2, "lastVerified": "2026-10-05" }, { "slug": "feet-of-head-to-psi-calculator", "category": "plumbing-hvac", "title": "Feet of Head to PSI Calculator", "description": "Convert a vertical water column in feet into pressure in psi, for pump selection and system pressure checks.", "url": "https://craftquantities.com/calculators/plumbing-hvac/feet-of-head-to-psi-calculator/", "json": "https://craftquantities.com/api/v1/calculators/feet-of-head-to-psi-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "feet-per-minute-to-meters-per-second-calculator", "category": "measurements-conversions", "title": "Feet per Minute to Metres per Second Calculator", "description": "Convert a feet-per-minute air velocity into metres per second for metric fan, coil and hood selection.", "url": "https://craftquantities.com/calculators/measurements-conversions/feet-per-minute-to-meters-per-second-calculator/", "json": "https://craftquantities.com/api/v1/calculators/feet-per-minute-to-meters-per-second-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "feet-to-inches-calculator", "category": "measurements-conversions", "title": "Feet to Inches Calculator", "description": "Convert feet, including decimal feet, into inches — for setting out from a drawing dimensioned in the other form.", "url": "https://craftquantities.com/calculators/measurements-conversions/feet-to-inches-calculator/", "json": "https://craftquantities.com/api/v1/calculators/feet-to-inches-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-12" }, { "slug": "feet-to-meters-calculator", "category": "measurements-conversions", "title": "Feet to Metres Calculator", "description": "Convert feet to metres for metric drawings, structural schedules and material orders.", "url": "https://craftquantities.com/calculators/measurements-conversions/feet-to-meters-calculator/", "json": "https://craftquantities.com/api/v1/calculators/feet-to-meters-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "fence-calculator", "category": "auto-utility", "title": "Fence Calculator", "description": "Estimate the posts and rails needed for a wood fence run.", "url": "https://craftquantities.com/calculators/auto-utility/fence-calculator/", "json": "https://craftquantities.com/api/v1/calculators/fence-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "fence-panel-calculator", "category": "landscaping-outdoor", "title": "Fence Panel and Post Calculator (Lap, Closeboard and Privacy Panels)", "description": "How many ready-made fence panels a run takes, and the posts, caps, fixings, gravel boards and bags of post-fix concrete that go with them.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/fence-panel-calculator/", "json": "https://craftquantities.com/api/v1/calculators/fence-panel-calculator.json", "inputCount": 13, "testCaseCount": 5, "sourceCount": 7, "lastVerified": "2026-10-05" }, { "slug": "fence-picket-calculator", "category": "renovation-construction", "title": "Fence Picket Calculator", "description": "Estimate how many fence pickets you need based on fence length, picket width, and gap spacing.", "url": "https://craftquantities.com/calculators/renovation-construction/fence-picket-calculator/", "json": "https://craftquantities.com/api/v1/calculators/fence-picket-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-17" }, { "slug": "fenestration-rough-opening-calculator", "category": "materials-quantities", "title": "Fenestration Rough Opening Calculator", "description": "Size the framed opening for a window or door once shim space, the sill pan and an out-of-square allowance are all in the sum.", "url": "https://craftquantities.com/calculators/materials-quantities/fenestration-rough-opening-calculator/", "json": "https://craftquantities.com/api/v1/calculators/fenestration-rough-opening-calculator.json", "inputCount": 7, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-08-30" }, { "slug": "fiber-cement-caulk-volume-calculator", "category": "materials-quantities", "title": "Fiber-Cement Siding Caulk Joint Volume Calculator", "description": "The sealant volume for the joints fiber-cement siding is caulked at, such as trim, corners and penetrations, from their total length and bead size.", "url": "https://craftquantities.com/calculators/materials-quantities/fiber-cement-caulk-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/fiber-cement-caulk-volume-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "fiber-cement-corner-post-calculator", "category": "materials-quantities", "title": "Fiber-Cement Siding Corner Post Calculator", "description": "Calculate the total corner post material needed for a fiber-cement siding installation's outside/inside corners.", "url": "https://craftquantities.com/calculators/materials-quantities/fiber-cement-corner-post-calculator/", "json": "https://craftquantities.com/api/v1/calculators/fiber-cement-corner-post-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "fiber-cement-cutting-waste-calculator", "category": "materials-quantities", "title": "Fiber-Cement Siding Cutting Waste Factor Calculator", "description": "Calculate fiber-cement siding material needed including its characteristic higher cutting waste factor.", "url": "https://craftquantities.com/calculators/materials-quantities/fiber-cement-cutting-waste-calculator/", "json": "https://craftquantities.com/api/v1/calculators/fiber-cement-cutting-waste-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "fiber-cement-reveal-calculator", "category": "materials-quantities", "title": "Fiber-Cement Siding Plank Reveal & Course Calculator", "description": "Calculate the number of fiber-cement lap siding courses needed for a wall, based on the plank's exposed reveal height.", "url": "https://craftquantities.com/calculators/materials-quantities/fiber-cement-reveal-calculator/", "json": "https://craftquantities.com/api/v1/calculators/fiber-cement-reveal-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "fill-dirt-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Fill Dirt Cubic Yards to Tons Calculator", "description": "Convert a fill dirt volume in cubic yards into short tons for weight-based pricing and haulage.", "url": "https://craftquantities.com/calculators/materials-quantities/fill-dirt-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/fill-dirt-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "fill-dirt-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Fill Dirt Tons to Cubic Yards Calculator", "description": "Convert a fill dirt tonnage into cubic yards to check coverage and storage space.", "url": "https://craftquantities.com/calculators/materials-quantities/fill-dirt-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/fill-dirt-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "finish-level-compound-calculator", "category": "renovation-construction", "title": "Drywall Finish Level Compound Calculator", "description": "Joint compound by GA-214 finish level, from joint lengths and coat counts, with the Level 5 skim carried across the whole surface, not just the seams.", "url": "https://craftquantities.com/calculators/renovation-construction/finish-level-compound-calculator/", "json": "https://craftquantities.com/api/v1/calculators/finish-level-compound-calculator.json", "inputCount": 8, "testCaseCount": 3, "sourceCount": 5, "lastVerified": "2026-08-30" }, { "slug": "fire-extinguisher-count-calculator", "category": "materials-quantities", "title": "Fire Extinguisher Count and Travel Distance Calculator", "description": "How many extinguishers a floor takes by the area rule and by the travel rule — and which of the two governs, because it is usually the one people skip.", "url": "https://craftquantities.com/calculators/materials-quantities/fire-extinguisher-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/fire-extinguisher-count-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-09-23" }, { "slug": "fire-joint-movement-volume-calculator", "category": "materials-quantities", "title": "Firestop Joint Movement and Sealant Volume Calculator", "description": "How far a head-of-wall joint opens and closes at its listed movement class, and how much backing and sealant the run consumes at the listed fill depth.", "url": "https://craftquantities.com/calculators/materials-quantities/fire-joint-movement-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/fire-joint-movement-volume-calculator.json", "inputCount": 7, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-08-30" }, { "slug": "fire-rated-glazing-clearance-lookup", "category": "materials-quantities", "title": "Fire-Rated Glazing Typical Edge Clearance Reference", "description": "Look up a typical listed edge clearance (bite) range for common fire-rated glazing and frame type combinations.", "url": "https://craftquantities.com/calculators/materials-quantities/fire-rated-glazing-clearance-lookup/", "json": "https://craftquantities.com/api/v1/calculators/fire-rated-glazing-clearance-lookup.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "fire-rated-gypsum-layer-calculator", "category": "materials-quantities", "title": "Multi-Layer Fire-Rated (Type X) Gypsum Sheet Calculator", "description": "Calculate total Type X gypsum board sheets needed for a multi-layer, both-sides fire-rated wall assembly.", "url": "https://craftquantities.com/calculators/materials-quantities/fire-rated-gypsum-layer-calculator/", "json": "https://craftquantities.com/api/v1/calculators/fire-rated-gypsum-layer-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "firebrick-thermal-expansion-calculator", "category": "materials-quantities", "title": "Firebrick Chimney Liner Thermal Expansion Calculator", "description": "Estimate the thermal expansion gap needed for a firebrick or fireclay chimney liner between installation and operating temperature.", "url": "https://craftquantities.com/calculators/materials-quantities/firebrick-thermal-expansion-calculator/", "json": "https://craftquantities.com/api/v1/calculators/firebrick-thermal-expansion-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-03" }, { "slug": "fireplace-hearth-size-calculator", "category": "materials-quantities", "title": "Fireplace Hearth Size Calculator", "description": "The smallest non-combustible hearth: the IRC's extension for a masonry fireplace, or Approved Document J's constructional hearth for a recess or a stove.", "url": "https://craftquantities.com/calculators/materials-quantities/fireplace-hearth-size-calculator/", "json": "https://craftquantities.com/api/v1/calculators/fireplace-hearth-size-calculator.json", "inputCount": 8, "testCaseCount": 5, "sourceCount": 3, "lastVerified": "2026-09-25" }, { "slug": "fireplace-mantel-clearance-calculator", "category": "materials-quantities", "title": "Fireplace Mantel Clearance Calculator", "description": "How far a combustible mantel or trim may stand out at a set distance from a masonry fireplace opening, and the least distance for its depth, by the IRC.", "url": "https://craftquantities.com/calculators/materials-quantities/fireplace-mantel-clearance-calculator/", "json": "https://craftquantities.com/api/v1/calculators/fireplace-mantel-clearance-calculator.json", "inputCount": 2, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-25" }, { "slug": "firestop-caulk-volume-calculator", "category": "materials-quantities", "title": "Penetration Firestop Caulk Volume Calculator", "description": "Calculate the firestop sealant volume needed to seal the annular gap around wall/floor penetrations.", "url": "https://craftquantities.com/calculators/materials-quantities/firestop-caulk-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/firestop-caulk-volume-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "firewood-cord-calculator", "category": "materials-quantities", "title": "Firewood Cord Calculator", "description": "Calculate how many cords of firewood a stacked pile represents, based on its dimensions.", "url": "https://craftquantities.com/calculators/materials-quantities/firewood-cord-calculator/", "json": "https://craftquantities.com/api/v1/calculators/firewood-cord-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "flashing-trim-sheet-calculator", "category": "materials-quantities", "title": "Exterior Flashing Layout Trim Sheet Calculator", "description": "Calculate how many flashing sheets or coil pieces are needed for a total flashing run length.", "url": "https://craftquantities.com/calculators/materials-quantities/flashing-trim-sheet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/flashing-trim-sheet-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "flex-duct-friction-loss-calculator", "category": "materials-quantities", "title": "Flexible Duct Friction Pressure Loss Calculator", "description": "Estimate friction pressure loss through a flexible duct run from a curve-fit of the ASHRAE duct friction chart, times an installation-quality factor.", "url": "https://craftquantities.com/calculators/materials-quantities/flex-duct-friction-loss-calculator/", "json": "https://craftquantities.com/api/v1/calculators/flex-duct-friction-loss-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "float-and-set-plaster-calculator", "category": "materials-quantities", "title": "Float and Set Plaster Calculator", "description": "Undercoat and finish plaster for a masonry wall, as two separate bag counts — because the two coats are different products at very different densities.", "url": "https://craftquantities.com/calculators/materials-quantities/float-and-set-plaster-calculator/", "json": "https://craftquantities.com/api/v1/calculators/float-and-set-plaster-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-23" }, { "slug": "floor-drain-screed-calculator", "category": "materials-quantities", "title": "Floor Drain Slope Screed Volume Calculator", "description": "Calculate the screed/mortar volume needed to slope a floor toward a central drain.", "url": "https://craftquantities.com/calculators/materials-quantities/floor-drain-screed-calculator/", "json": "https://craftquantities.com/api/v1/calculators/floor-drain-screed-calculator.json", "inputCount": 3, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "floor-finish-coverage-calculator", "category": "renovation-construction", "title": "Floor Sanding and Finish Calculator", "description": "Sanding and refinishing a wood floor: the sealer and finish to buy coat by coat, the drum sheets and edger discs per grit, and the screening pads.", "url": "https://craftquantities.com/calculators/renovation-construction/floor-finish-coverage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/floor-finish-coverage-calculator.json", "inputCount": 17, "testCaseCount": 6, "sourceCount": 12, "lastVerified": "2026-09-28" }, { "slug": "floor-perimeter-expansion-gap-calculator", "category": "materials-quantities", "title": "Floating Floor Perimeter Expansion Gap Spacer Calculator", "description": "Calculate how many expansion gap spacers are needed around a floating floor's perimeter.", "url": "https://craftquantities.com/calculators/materials-quantities/floor-perimeter-expansion-gap-calculator/", "json": "https://craftquantities.com/api/v1/calculators/floor-perimeter-expansion-gap-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "floor-primer-dilution-calculator", "category": "materials-quantities", "title": "Floor Primer Dilution and Coverage Calculator", "description": "How much neat primer and how much water a diluted coat actually takes, so a 1:1 mix is ordered as the half-tin it is rather than the full one.", "url": "https://craftquantities.com/calculators/materials-quantities/floor-primer-dilution-calculator/", "json": "https://craftquantities.com/api/v1/calculators/floor-primer-dilution-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-20" }, { "slug": "floor-screed-calculator", "category": "materials-quantities", "title": "Floor Screed Calculator — Sand and Cement, Bagged or Liquid", "description": "How much screed a floor takes at your depth, and what to order: sand and cement to mix on site, bags of premix, or a ready-to-use or liquid delivery.", "url": "https://craftquantities.com/calculators/materials-quantities/floor-screed-calculator/", "json": "https://craftquantities.com/api/v1/calculators/floor-screed-calculator.json", "inputCount": 10, "testCaseCount": 3, "sourceCount": 10, "lastVerified": "2026-10-05" }, { "slug": "floor-tile-calculator", "category": "renovation-construction", "title": "Floor & Wall Tile Calculator", "description": "Count tiles and boxes for a floor or wall, with the waste factor the lay pattern actually needs.", "url": "https://craftquantities.com/calculators/renovation-construction/floor-tile-calculator/", "json": "https://craftquantities.com/api/v1/calculators/floor-tile-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-17" }, { "slug": "floor-transition-strip-calculator", "category": "materials-quantities", "title": "Floor Transition Strip Calculator", "description": "Calculate the total transition strip length needed at doorways and flooring-material changes.", "url": "https://craftquantities.com/calculators/materials-quantities/floor-transition-strip-calculator/", "json": "https://craftquantities.com/api/v1/calculators/floor-transition-strip-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "floor-underlayment-roll-calculator", "category": "materials-quantities", "title": "Laminate/Vinyl Plank Floor Underlayment Roll Calculator", "description": "Calculate how many underlayment rolls are needed beneath a laminate or vinyl plank floor.", "url": "https://craftquantities.com/calculators/materials-quantities/floor-underlayment-roll-calculator/", "json": "https://craftquantities.com/api/v1/calculators/floor-underlayment-roll-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "floor-vibration-frequency-calculator", "category": "materials-quantities", "title": "Floor Beam Vibration Natural Frequency Calculator", "description": "A floor beam's natural frequency and the walking paces that can resonate it, since a beam can meet every deflection ratio and still feel lively underfoot.", "url": "https://craftquantities.com/calculators/materials-quantities/floor-vibration-frequency-calculator/", "json": "https://craftquantities.com/api/v1/calculators/floor-vibration-frequency-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 4, "lastVerified": "2026-08-30" }, { "slug": "flooring-adhesive-calculator", "category": "materials-quantities", "title": "Flooring Adhesive Calculator — Glue-Down Vinyl, LVT, Carpet or Wood", "description": "How many tubs or pails of adhesive a glued-down floor takes, from the area and the coverage the adhesive maker prints for your trowel notch.", "url": "https://craftquantities.com/calculators/materials-quantities/flooring-adhesive-calculator/", "json": "https://craftquantities.com/api/v1/calculators/flooring-adhesive-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-10-05" }, { "slug": "flooring-calculator", "category": "renovation-construction", "title": "Flooring Calculator", "description": "Estimate how much flooring material to order, with a waste allowance based on material and layout.", "url": "https://craftquantities.com/calculators/renovation-construction/flooring-calculator/", "json": "https://craftquantities.com/api/v1/calculators/flooring-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-17" }, { "slug": "flooring-cost-comparison-calculator", "category": "financial-adjacent", "title": "Flooring Cost Comparison Calculator", "description": "Compare two flooring options by their annualized cost per square foot, factoring in expected lifespan.", "url": "https://craftquantities.com/calculators/financial-adjacent/flooring-cost-comparison-calculator/", "json": "https://craftquantities.com/api/v1/calculators/flooring-cost-comparison-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "fluid-applied-wrb-coverage-calculator", "category": "materials-quantities", "title": "Fluid-Applied Weather Barrier Coating Coverage Calculator", "description": "Work out how much fluid-applied barrier a substrate takes at the specified wet film build, and how much detail tape or mesh goes with it.", "url": "https://craftquantities.com/calculators/materials-quantities/fluid-applied-wrb-coverage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/fluid-applied-wrb-coverage-calculator.json", "inputCount": 6, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-30" }, { "slug": "foam-board-insulation-calculator", "category": "insulation-efficiency", "title": "Foam Board Insulation Calculator", "description": "Estimate how many 4x8 ft (2400x1200 mm) rigid foam insulation sheets (XPS, EPS, or polyiso) you need.", "url": "https://craftquantities.com/calculators/insulation-efficiency/foam-board-insulation-calculator/", "json": "https://craftquantities.com/api/v1/calculators/foam-board-insulation-calculator.json", "inputCount": 2, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-17" }, { "slug": "foot-candles-to-lux-calculator", "category": "measurements-conversions", "title": "Foot-Candles to Lux Calculator", "description": "Convert a foot-candle lighting level into lux, for specifying North American light levels with metric fittings.", "url": "https://craftquantities.com/calculators/measurements-conversions/foot-candles-to-lux-calculator/", "json": "https://craftquantities.com/api/v1/calculators/foot-candles-to-lux-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-12" }, { "slug": "footing-bearing-pressure-calculator", "category": "materials-quantities", "title": "Footing Soil Bearing Pressure Checker", "description": "Check whether a footing's applied pressure stays within the soil's allowable bearing capacity.", "url": "https://craftquantities.com/calculators/materials-quantities/footing-bearing-pressure-calculator/", "json": "https://craftquantities.com/api/v1/calculators/footing-bearing-pressure-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "formwork-brace-force-calculator", "category": "materials-quantities", "title": "Formwork Brace & Kicker Force Calculator", "description": "The axial load in a wall-form brace (kicker) from the lateral pressure on its tributary strip, and the horizontal and vertical reactions at its anchor.", "url": "https://craftquantities.com/calculators/materials-quantities/formwork-brace-force-calculator/", "json": "https://craftquantities.com/api/v1/calculators/formwork-brace-force-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 4, "lastVerified": "2026-08-30" }, { "slug": "formwork-tie-spacing-calculator", "category": "materials-quantities", "title": "Concrete Formwork Tie Spacing Calculator", "description": "Compute the maximum square-grid spacing for form ties, given the fresh concrete's lateral pressure and the tie's rated capacity.", "url": "https://craftquantities.com/calculators/materials-quantities/formwork-tie-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/formwork-tie-spacing-calculator.json", "inputCount": 3, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "foundation-frost-insulation-calculator", "category": "materials-quantities", "title": "Foundation Frost-Protection Insulation Depth Calculator", "description": "Calculate the rigid insulation thickness needed to achieve a target R-value for frost-protected shallow foundations.", "url": "https://craftquantities.com/calculators/materials-quantities/foundation-frost-insulation-calculator/", "json": "https://craftquantities.com/api/v1/calculators/foundation-frost-insulation-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "framing-stud-calculator", "category": "renovation-construction", "title": "Framing Stud Calculator", "description": "Estimate how many wall studs you need for a wall run, at standard 16 or 24 in (400 or 600 mm) on-center spacing.", "url": "https://craftquantities.com/calculators/renovation-construction/framing-stud-calculator/", "json": "https://craftquantities.com/api/v1/calculators/framing-stud-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "frc-fiber-dosage-calculator", "category": "materials-quantities", "title": "Fiber-Reinforced Concrete (FRC) Dosage Calculator", "description": "Estimate the mass of synthetic (polypropylene) micro-fiber needed for a fiber-reinforced concrete pour.", "url": "https://craftquantities.com/calculators/materials-quantities/frc-fiber-dosage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/frc-fiber-dosage-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "french-drain-calculator", "category": "auto-utility", "title": "French Drain Gravel Calculator", "description": "Estimate the gravel backfill a French drain trench needs, in cubic yards or cubic metres, net of the drain pipe's own volume.", "url": "https://craftquantities.com/calculators/auto-utility/french-drain-calculator/", "json": "https://craftquantities.com/api/v1/calculators/french-drain-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "furnace-sizing-calculator", "category": "plumbing-hvac", "title": "Furnace Sizing Calculator", "description": "Get a rule-of-thumb furnace size recommendation, in BTU/hr or kW, based on house area and climate.", "url": "https://craftquantities.com/calculators/plumbing-hvac/furnace-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/furnace-sizing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "gabion-basket-calculator", "category": "landscaping-outdoor", "title": "Gabion Basket and Stone Calculator", "description": "How many gabion baskets a wall needs in the sizes your market sells, and the weight of stone to fill them once the voids between stones are allowed for.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/gabion-basket-calculator/", "json": "https://craftquantities.com/api/v1/calculators/gabion-basket-calculator.json", "inputCount": 10, "testCaseCount": 7, "sourceCount": 3, "lastVerified": "2026-09-21" }, { "slug": "gallons-to-cubic-feet-calculator", "category": "measurements-conversions", "title": "Gallons to Cubic Feet Calculator", "description": "Convert between gallons and cubic feet for tanks, ponds, and water storage projects.", "url": "https://craftquantities.com/calculators/measurements-conversions/gallons-to-cubic-feet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/gallons-to-cubic-feet-calculator.json", "inputCount": 2, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-16" }, { "slug": "galvanic-corrosion-risk-calculator", "category": "materials-quantities", "title": "Dielectric Union Galvanic Corrosion Risk Evaluator", "description": "Check the galvanic corrosion risk between two dissimilar pipe metals and whether a dielectric union is recommended.", "url": "https://craftquantities.com/calculators/materials-quantities/galvanic-corrosion-risk-calculator/", "json": "https://craftquantities.com/api/v1/calculators/galvanic-corrosion-risk-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "gambrel-roof-rafter-calculator", "category": "materials-quantities", "title": "Gambrel Roof Rafter Geometry Calculator", "description": "Calculate total rafter length for a two-slope gambrel (barn-style) roof from building width and each segment's pitch.", "url": "https://craftquantities.com/calculators/materials-quantities/gambrel-roof-rafter-calculator/", "json": "https://craftquantities.com/api/v1/calculators/gambrel-roof-rafter-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "garden-soil-calculator", "category": "landscaping-outdoor", "title": "Garden Soil Calculator", "description": "Work out the soil or growing medium a bed needs, with the settlement allowance that stops it looking half-full a month later.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/garden-soil-calculator/", "json": "https://craftquantities.com/api/v1/calculators/garden-soil-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "gas-pipe-capacity-calculator", "category": "materials-quantities", "title": "Fuel Gas Pipe Capacity Calculator", "description": "Calculate a fuel gas pipe's volumetric flow capacity at a maximum allowable gas velocity.", "url": "https://craftquantities.com/calculators/materials-quantities/gas-pipe-capacity-calculator/", "json": "https://craftquantities.com/api/v1/calculators/gas-pipe-capacity-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "gas-pipe-sizing-calculator", "category": "plumbing-hvac", "title": "Gas Pipe Sizing Calculator (Longest-Length Method)", "description": "Turn a connected appliance load into the gas flow and the table row the NFPA 54 longest-length method needs, for natural gas or propane.", "url": "https://craftquantities.com/calculators/plumbing-hvac/gas-pipe-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/gas-pipe-sizing-calculator.json", "inputCount": 6, "testCaseCount": 4, "sourceCount": 4, "lastVerified": "2026-09-11" }, { "slug": "generator-fuel-runtime-calculator", "category": "electrical", "title": "Generator Fuel Runtime Calculator", "description": "Estimate how long a generator will run on a tank of fuel at a given load.", "url": "https://craftquantities.com/calculators/electrical/generator-fuel-runtime-calculator/", "json": "https://craftquantities.com/api/v1/calculators/generator-fuel-runtime-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "generator-sizing-calculator", "category": "electrical", "title": "Generator Sizing Calculator", "description": "Estimate the minimum running-watt capacity a backup generator needs for your household loads.", "url": "https://craftquantities.com/calculators/electrical/generator-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/generator-sizing-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "geocell-infill-volume-calculator", "category": "materials-quantities", "title": "Geocell Gravity Retaining Wall Infill Volume Calculator", "description": "Calculate the aggregate infill volume needed for a geocell-reinforced gravity retaining wall system.", "url": "https://craftquantities.com/calculators/materials-quantities/geocell-infill-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/geocell-infill-volume-calculator.json", "inputCount": 3, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-06" }, { "slug": "geogrid-layer-count-calculator", "category": "materials-quantities", "title": "Geogrid Reinforcement Layer Count Calculator", "description": "Estimate the number of horizontal geogrid reinforcement layers and total material length for a reinforced soil wall or slope.", "url": "https://craftquantities.com/calculators/materials-quantities/geogrid-layer-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/geogrid-layer-count-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-03" }, { "slug": "geotextile-riprap-overlap-calculator", "category": "heavy-civil", "title": "Geotextile Riprap Fabric Overlap Calculator", "description": "Estimate the total geotextile filter fabric needed under a riprap slope, accounting for overlap between adjacent rolls.", "url": "https://craftquantities.com/calculators/heavy-civil/geotextile-riprap-overlap-calculator/", "json": "https://craftquantities.com/api/v1/calculators/geotextile-riprap-overlap-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-23" }, { "slug": "glass-balustrade-stress-calculator", "category": "materials-quantities", "title": "Glass Balustrade Bending Stress Checker", "description": "Calculate the bending stress in a glass balustrade panel under the standard code-required guard line load.", "url": "https://craftquantities.com/calculators/materials-quantities/glass-balustrade-stress-calculator/", "json": "https://craftquantities.com/api/v1/calculators/glass-balustrade-stress-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "glass-block-panel-calculator", "category": "materials-quantities", "title": "Glass Block Panel Expansion Strip & Wire Calculator", "description": "Estimate the perimeter expansion strip length and horizontal wire reinforcement needed for a glass block panel.", "url": "https://craftquantities.com/calculators/materials-quantities/glass-block-panel-calculator/", "json": "https://craftquantities.com/api/v1/calculators/glass-block-panel-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "glass-panel-lift-safety-calculator", "category": "materials-quantities", "title": "Glass Panel Lift Safety Weight Checker", "description": "Check a glass panel's weight against a safe manual-lifting threshold.", "url": "https://craftquantities.com/calculators/materials-quantities/glass-panel-lift-safety-calculator/", "json": "https://craftquantities.com/api/v1/calculators/glass-panel-lift-safety-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-27" }, { "slug": "glass-panel-weight-calculator", "category": "materials-quantities", "title": "Structural Glass Panel Weight Calculator", "description": "Calculate the weight of a laminated glass panel from its dimensions, thickness, and ply count, for handling and logistics planning.", "url": "https://craftquantities.com/calculators/materials-quantities/glass-panel-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/glass-panel-weight-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "glazing-gasket-linear-footage-calculator", "category": "materials-quantities", "title": "Glazing Gasket/Wedge Linear Footage Calculator", "description": "Calculate the total glazing gasket or wedge material needed for a batch of glass lites, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/glazing-gasket-linear-footage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/glazing-gasket-linear-footage-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "glulam-beam-deflection-calculator", "category": "materials-quantities", "title": "Glulam Beam Deflection Checker", "description": "Check calculated glulam beam deflection against standard L/180 (roof) or L/360 (floor) code limits.", "url": "https://craftquantities.com/calculators/materials-quantities/glulam-beam-deflection-calculator/", "json": "https://craftquantities.com/api/v1/calculators/glulam-beam-deflection-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "gpm-to-liters-per-minute-calculator", "category": "plumbing-hvac", "title": "GPM to Litres per Minute Calculator", "description": "Convert US gallons per minute into litres per minute for metric pump and fixture ratings.", "url": "https://craftquantities.com/calculators/plumbing-hvac/gpm-to-liters-per-minute-calculator/", "json": "https://craftquantities.com/api/v1/calculators/gpm-to-liters-per-minute-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "gpm-to-lpm-calculator", "category": "measurements-conversions", "title": "GPM to LPM Calculator", "description": "Convert flow rate between gallons per minute and liters per minute for pumps and irrigation.", "url": "https://craftquantities.com/calculators/measurements-conversions/gpm-to-lpm-calculator/", "json": "https://craftquantities.com/api/v1/calculators/gpm-to-lpm-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "grass-seed-calculator", "category": "landscaping-outdoor", "title": "Grass Seed Calculator", "description": "Estimate how many pounds or kilograms of grass seed you need, based on lawn area and your seed product's recommended rate.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/grass-seed-calculator/", "json": "https://craftquantities.com/api/v1/calculators/grass-seed-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "grassed-swale-capacity-calculator", "category": "heavy-civil", "title": "Grassed Swale Capacity & Velocity Calculator", "description": "What a trapezoidal grassed swale carries at a flow depth by Manning's equation, and its velocity set beside the permissible velocity for the lining.", "url": "https://craftquantities.com/calculators/heavy-civil/grassed-swale-capacity-calculator/", "json": "https://craftquantities.com/api/v1/calculators/grassed-swale-capacity-calculator.json", "inputCount": 6, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-08-30" }, { "slug": "gravel-base-tonnage-calculator", "category": "materials-quantities", "title": "Gravel Base Layer Tonnage Calculator", "description": "Estimate the tonnage of crushed stone or gravel base needed for a pavement or slab sub-base layer.", "url": "https://craftquantities.com/calculators/materials-quantities/gravel-base-tonnage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/gravel-base-tonnage-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "gravel-calculator", "category": "landscaping-outdoor", "title": "Gravel Calculator", "description": "Work out the loose gravel to order for a driveway, path or base layer — by volume, by weight, and in the tons or tonnes you order in.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/gravel-calculator/", "json": "https://craftquantities.com/api/v1/calculators/gravel-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-26" }, { "slug": "gravel-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Gravel Cubic Yards to Tons Calculator", "description": "Convert a gravel volume in cubic yards into short tons, for suppliers who price and weigh by the ton.", "url": "https://craftquantities.com/calculators/materials-quantities/gravel-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/gravel-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "gravel-driveway-calculator", "category": "auto-utility", "title": "Gravel Driveway Calculator", "description": "Estimate the crushed stone needed for a gravel driveway, in tons or tonnes, based on area and depth.", "url": "https://craftquantities.com/calculators/auto-utility/gravel-driveway-calculator/", "json": "https://craftquantities.com/api/v1/calculators/gravel-driveway-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "gravel-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Gravel Tons to Cubic Yards Calculator", "description": "Convert a quoted or delivered gravel tonnage into cubic yards to check it covers the area you measured.", "url": "https://craftquantities.com/calculators/materials-quantities/gravel-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/gravel-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "grease-trap-sizing-calculator", "category": "materials-quantities", "title": "Grease Trap Sizing Calculator (PDI-G101 Method)", "description": "Calculate the required grease trap capacity for a commercial kitchen, based on flow rate, retention time, and storage factor.", "url": "https://craftquantities.com/calculators/materials-quantities/grease-trap-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/grease-trap-sizing-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "green-roof-growing-medium-calculator", "category": "materials-quantities", "title": "Green Roof Growing Medium Volume Calculator", "description": "Calculate the volume of growing medium (substrate) needed to fill a green roof to its design depth.", "url": "https://craftquantities.com/calculators/materials-quantities/green-roof-growing-medium-calculator/", "json": "https://craftquantities.com/api/v1/calculators/green-roof-growing-medium-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "green-roof-retention-calculator", "category": "materials-quantities", "title": "Green Roof Vegetated Tray Rainwater Retention Calculator", "description": "Calculate the rainwater volume a green roof's vegetated trays retain before runoff, based on their retention depth.", "url": "https://craftquantities.com/calculators/materials-quantities/green-roof-retention-calculator/", "json": "https://craftquantities.com/api/v1/calculators/green-roof-retention-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "green-roof-saturated-load-calculator", "category": "materials-quantities", "title": "Green Roof Growing Medium Saturated Load Calculator", "description": "Calculate the total saturated weight of a green roof's growing medium, for structural load verification.", "url": "https://craftquantities.com/calculators/materials-quantities/green-roof-saturated-load-calculator/", "json": "https://craftquantities.com/api/v1/calculators/green-roof-saturated-load-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "greenhouse-heating-btu-calculator", "category": "plumbing-hvac", "title": "Greenhouse Heating BTU Calculator", "description": "Estimate the heater size needed to keep a greenhouse warm, based on glazing type and temperature difference.", "url": "https://craftquantities.com/calculators/plumbing-hvac/greenhouse-heating-btu-calculator/", "json": "https://craftquantities.com/api/v1/calculators/greenhouse-heating-btu-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "greywater-cistern-peak-inflow-calculator", "category": "sustainability-compliance", "title": "Greywater Collection Cistern Peak Inflow Calculator", "description": "Calculate the peak inflow rate a greywater collection cistern must handle, from average daily flow and a peaking factor.", "url": "https://craftquantities.com/calculators/sustainability-compliance/greywater-cistern-peak-inflow-calculator/", "json": "https://craftquantities.com/api/v1/calculators/greywater-cistern-peak-inflow-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "ground-rod-resistance-calculator", "category": "materials-quantities", "title": "Isolated Ground Rod Earth Resistance Calculator (Dwight's Formula)", "description": "Calculate a single driven ground rod's earth resistance using Dwight's formula.", "url": "https://craftquantities.com/calculators/materials-quantities/ground-rod-resistance-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ground-rod-resistance-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "grounding-conductor-sizing-calculator", "category": "materials-quantities", "title": "Equipment Grounding Conductor Sizing Reference Calculator", "description": "Estimate a proportional equipment grounding conductor size from the circuit's overcurrent device rating.", "url": "https://craftquantities.com/calculators/materials-quantities/grounding-conductor-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/grounding-conductor-sizing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "grounding-grid-resistance-calculator", "category": "materials-quantities", "title": "Server Room Grounding Grid Resistance Calculator", "description": "Estimate a ground grid's earth resistance using a simplified hemisphere approximation.", "url": "https://craftquantities.com/calculators/materials-quantities/grounding-grid-resistance-calculator/", "json": "https://craftquantities.com/api/v1/calculators/grounding-grid-resistance-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "grout-calculator", "category": "renovation-construction", "title": "Grout Calculator", "description": "Work out the grout a tiled floor or wall takes from the tile size, the joint width and the joint depth, by weight and in bags.", "url": "https://craftquantities.com/calculators/renovation-construction/grout-calculator/", "json": "https://craftquantities.com/api/v1/calculators/grout-calculator.json", "inputCount": 7, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-17" }, { "slug": "grout-weight-calculator", "category": "materials-quantities", "title": "Grout Weight Consumption Calculator", "description": "Convert a required grout volume into the mass needed, when buying grout in bulk rather than pre-packaged bags.", "url": "https://craftquantities.com/calculators/materials-quantities/grout-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/grout-weight-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-17" }, { "slug": "guardrail-compliance-checker", "category": "materials-quantities", "title": "Guardrail System Fall-Protection Compliance Checker", "description": "Check a guardrail system's top rail height and rated load capacities against the fixed requirements of OSHA 29 CFR 1926.502(b).", "url": "https://craftquantities.com/calculators/materials-quantities/guardrail-compliance-checker/", "json": "https://craftquantities.com/api/v1/calculators/guardrail-compliance-checker.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "guardrail-post-spacing-calculator", "category": "materials-quantities", "title": "Highway Guardrail Post Spacing Calculator", "description": "Post count for a W-beam highway guardrail run, at the AASHTO tangent spacing or the tighter spacing a transition calls for.", "url": "https://craftquantities.com/calculators/materials-quantities/guardrail-post-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/guardrail-post-spacing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "gutter-calculator", "category": "renovation-construction", "title": "Gutter Calculator", "description": "Estimate gutter sections and downspouts needed for a roofline.", "url": "https://craftquantities.com/calculators/renovation-construction/gutter-calculator/", "json": "https://craftquantities.com/api/v1/calculators/gutter-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "gutter-guard-calculator", "category": "materials-quantities", "title": "Gutter Guard Calculator", "description": "Estimate how many gutter guard sections you need to cover your total gutter run.", "url": "https://craftquantities.com/calculators/materials-quantities/gutter-guard-calculator/", "json": "https://craftquantities.com/api/v1/calculators/gutter-guard-calculator.json", "inputCount": 3, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-17" }, { "slug": "gutter-hanger-spacing-calculator", "category": "renovation-construction", "title": "Gutter Hanger Spacing Calculator", "description": "Estimate how many gutter hangers (brackets) you need to properly support a gutter run.", "url": "https://craftquantities.com/calculators/renovation-construction/gutter-hanger-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/gutter-hanger-spacing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "gypsum-waste-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Gypsum Waste Cubic Yards to Tons Calculator", "description": "Convert a gypsum waste volume into short tons for ordering, disposal and transport planning.", "url": "https://craftquantities.com/calculators/materials-quantities/gypsum-waste-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/gypsum-waste-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "gypsum-waste-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Gypsum Waste Tons to Cubic Yards Calculator", "description": "Convert a gypsum waste tonnage into cubic yards to check storage, capacity and coverage.", "url": "https://craftquantities.com/calculators/materials-quantities/gypsum-waste-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/gypsum-waste-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "hand-arm-vibration-exposure-calculator", "category": "sustainability-compliance", "title": "Hand-Arm Vibration Exposure (A(8)) and Points Calculator", "description": "Daily hand-arm vibration A(8) and HSE points from each tool's magnitude and trigger time, with each tool's time to the action and limit values.", "url": "https://craftquantities.com/calculators/sustainability-compliance/hand-arm-vibration-exposure-calculator/", "json": "https://craftquantities.com/api/v1/calculators/hand-arm-vibration-exposure-calculator.json", "inputCount": 8, "testCaseCount": 4, "sourceCount": 4, "lastVerified": "2026-09-21" }, { "slug": "handrail-length-calculator", "category": "renovation-construction", "title": "Handrail Length Calculator", "description": "Estimate the sloped handrail length needed for a staircase from its total rise and run.", "url": "https://craftquantities.com/calculators/renovation-construction/handrail-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/handrail-length-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-09-28" }, { "slug": "hardscape-area-calculator", "category": "landscaping-outdoor", "title": "Hardscape Area & Base Calculator", "description": "Work out surface area, sub-base and bedding sand for a patio, path or driveway in one pass.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/hardscape-area-calculator/", "json": "https://craftquantities.com/api/v1/calculators/hardscape-area-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "hat-channel-anchor-spacing-calculator", "category": "materials-quantities", "title": "Hat Channel (Metal Furring) Anchor Spacing Calculator", "description": "Calculate the total number of anchors needed for a hat channel furring system on a wall or ceiling.", "url": "https://craftquantities.com/calculators/materials-quantities/hat-channel-anchor-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/hat-channel-anchor-spacing-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "haul-cycle-time-calculator", "category": "heavy-civil", "title": "Truck Haul Cycle Time Calculator", "description": "Cycle time, hourly production and fleet size for an earthmoving haul, including the queueing that decides whether extra trucks help.", "url": "https://craftquantities.com/calculators/heavy-civil/haul-cycle-time-calculator/", "json": "https://craftquantities.com/api/v1/calculators/haul-cycle-time-calculator.json", "inputCount": 8, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-06" }, { "slug": "hazen-williams-friction-loss-calculator", "category": "materials-quantities", "title": "Domestic Water Pipe Friction Loss Calculator (Hazen-Williams)", "description": "Calculate the friction head loss in a domestic water supply pipe run using the Hazen-Williams formula.", "url": "https://craftquantities.com/calculators/materials-quantities/hazen-williams-friction-loss-calculator/", "json": "https://craftquantities.com/api/v1/calculators/hazen-williams-friction-loss-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "hearing-protection-attenuation-calculator", "category": "sustainability-compliance", "title": "Hearing Protection Attenuation Calculator (SNR, HML, NRR)", "description": "Estimate the noise reaching the ear under an earplug or earmuff from its SNR, HML or NRR rating, with the real-world allowance HSE and OSHA each apply.", "url": "https://craftquantities.com/calculators/sustainability-compliance/hearing-protection-attenuation-calculator/", "json": "https://craftquantities.com/api/v1/calculators/hearing-protection-attenuation-calculator.json", "inputCount": 10, "testCaseCount": 5, "sourceCount": 3, "lastVerified": "2026-09-21" }, { "slug": "heat-pump-sizing-calculator", "category": "plumbing-hvac", "title": "Heat Pump Sizing Calculator", "description": "Size a heat pump to a known heat loss, and find the balance point where supplementary heat starts to be needed.", "url": "https://craftquantities.com/calculators/plumbing-hvac/heat-pump-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/heat-pump-sizing-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-09-03" }, { "slug": "heat-trace-cable-calculator", "category": "materials-quantities", "title": "Pipe Freeze Protection Heat Trace Cable Length Calculator", "description": "Calculate the total self-regulating heat trace cable length needed for a pipe run, including valve/fitting allowances.", "url": "https://craftquantities.com/calculators/materials-quantities/heat-trace-cable-calculator/", "json": "https://craftquantities.com/api/v1/calculators/heat-trace-cable-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "heated-floor-mat-calculator", "category": "materials-quantities", "title": "Heated Wire Floor Mat Coverage & Wattage Calculator", "description": "Calculate the heating mat area and total wattage needed for an electric radiant floor heating installation.", "url": "https://craftquantities.com/calculators/materials-quantities/heated-floor-mat-calculator/", "json": "https://craftquantities.com/api/v1/calculators/heated-floor-mat-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "heated-screed-volume-calculator", "category": "materials-quantities", "title": "Heated Screed Volume Calculator", "description": "Screed quantity for an underfloor heating build-up, taking the cover over the tube crown and subtracting what the tube itself displaces.", "url": "https://craftquantities.com/calculators/materials-quantities/heated-screed-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/heated-screed-volume-calculator.json", "inputCount": 7, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-02" }, { "slug": "heating-circuit-flow-rate-calculator", "category": "plumbing-hvac", "title": "Heating Circuit Flow Rate Calculator (Heat Output, ΔT and Pipe Velocity)", "description": "The water flow a radiator, circuit or heating system needs to carry its heat at a design temperature drop, and its velocity in the pipe feeding it.", "url": "https://craftquantities.com/calculators/plumbing-hvac/heating-circuit-flow-rate-calculator/", "json": "https://craftquantities.com/api/v1/calculators/heating-circuit-flow-rate-calculator.json", "inputCount": 3, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-22" }, { "slug": "hectares-to-acres-calculator", "category": "measurements-conversions", "title": "Hectares to Acres Calculator", "description": "Convert hectares to acres for US land descriptions, deeds and site comparisons.", "url": "https://craftquantities.com/calculators/measurements-conversions/hectares-to-acres-calculator/", "json": "https://craftquantities.com/api/v1/calculators/hectares-to-acres-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "helical-anchor-pullout-calculator", "category": "materials-quantities", "title": "Helical Screw Anchor Pull-Out Capacity Calculator", "description": "Estimate a helical pile or anchor's ultimate capacity from its final installation torque, using the standard torque correlation method.", "url": "https://craftquantities.com/calculators/materials-quantities/helical-anchor-pullout-calculator/", "json": "https://craftquantities.com/api/v1/calculators/helical-anchor-pullout-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "hepa-filter-pressure-drop-calculator", "category": "materials-quantities", "title": "HEPA Filter Bank Pressure Drop Estimator", "description": "Estimate a HEPA filter bank's current pressure drop between its rated clean and final (loaded) values, based on a loading percentage.", "url": "https://craftquantities.com/calculators/materials-quantities/hepa-filter-pressure-drop-calculator/", "json": "https://craftquantities.com/api/v1/calculators/hepa-filter-pressure-drop-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "herringbone-pattern-waste-calculator", "category": "materials-quantities", "title": "Herringbone/Chevron Pattern Flooring Waste Calculator", "description": "Calculate flooring material needed for a herringbone or chevron pattern layout, using its higher characteristic waste factor.", "url": "https://craftquantities.com/calculators/materials-quantities/herringbone-pattern-waste-calculator/", "json": "https://craftquantities.com/api/v1/calculators/herringbone-pattern-waste-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "hip-valley-rafter-cutlist-calculator", "category": "materials-quantities", "title": "Hip/Valley Rafter Plumb Cut Angular Cutlist", "description": "Calculate hip or valley rafter length and plumb cut angle for a standard 45° hip/valley roof intersection.", "url": "https://craftquantities.com/calculators/materials-quantities/hip-valley-rafter-cutlist-calculator/", "json": "https://craftquantities.com/api/v1/calculators/hip-valley-rafter-cutlist-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "home-equity-loan-calculator", "category": "financial-adjacent", "title": "Home Equity Loan Calculator", "description": "Work out the equity available to borrow against, and what the repayment on it would be.", "url": "https://craftquantities.com/calculators/financial-adjacent/home-equity-loan-calculator/", "json": "https://craftquantities.com/api/v1/calculators/home-equity-loan-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "home-extension-cost-calculator", "category": "financial-adjacent", "title": "Home Extension Cost Calculator", "description": "Cost an extension including the two things that separate it from new build: the structural opening, and making good the house you already have.", "url": "https://craftquantities.com/calculators/financial-adjacent/home-extension-cost-calculator/", "json": "https://craftquantities.com/api/v1/calculators/home-extension-cost-calculator.json", "inputCount": 7, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "home-improvement-loan-payment-calculator", "category": "financial-adjacent", "title": "Home Improvement Loan Payment Calculator", "description": "Estimate the monthly payment on a fixed-rate home improvement loan from its amount, rate, and term.", "url": "https://craftquantities.com/calculators/financial-adjacent/home-improvement-loan-payment-calculator/", "json": "https://craftquantities.com/api/v1/calculators/home-improvement-loan-payment-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "horizontal-cylinder-partial-fill-calculator", "category": "materials-quantities", "title": "Horizontal Cylinder Tank Partial Fill Volume Calculator", "description": "How much liquid a horizontal cylindrical tank holds at a dipstick depth, with flat, dished or hemispherical ends, and the ullage left above it.", "url": "https://craftquantities.com/calculators/materials-quantities/horizontal-cylinder-partial-fill-calculator/", "json": "https://craftquantities.com/api/v1/calculators/horizontal-cylinder-partial-fill-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-09-15" }, { "slug": "house-wrap-calculator", "category": "renovation-construction", "title": "House Wrap Calculator", "description": "Estimate how many rolls of house wrap (weather barrier) you need for your exterior wall area.", "url": "https://craftquantities.com/calculators/renovation-construction/house-wrap-calculator/", "json": "https://craftquantities.com/api/v1/calculators/house-wrap-calculator.json", "inputCount": 2, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-17" }, { "slug": "hp-to-kw-calculator", "category": "electrical", "title": "Horsepower to kW Calculator", "description": "Convert motor horsepower into kilowatts for metric motor selection, cabling and supply paperwork.", "url": "https://craftquantities.com/calculators/electrical/hp-to-kw-calculator/", "json": "https://craftquantities.com/api/v1/calculators/hp-to-kw-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "hss-composite-column-calculator", "category": "materials-quantities", "title": "Concrete-Filled HSS Composite Column Capacity Calculator", "description": "Estimate the cross-sectional compressive capacity of a concrete-filled HSS composite column.", "url": "https://craftquantities.com/calculators/materials-quantities/hss-composite-column-calculator/", "json": "https://craftquantities.com/api/v1/calculators/hss-composite-column-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "hss-tube-weight-calculator", "category": "materials-quantities", "title": "HSS (Square/Rectangular Tube) Weight Calculator", "description": "Calculate a hollow structural section (HSS) tube's weight per unit length from its outer dimensions and wall thickness.", "url": "https://craftquantities.com/calculators/materials-quantities/hss-tube-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/hss-tube-weight-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "humidifier-capacity-calculator", "category": "materials-quantities", "title": "Steam Humidifier Moisture Capacity Calculator", "description": "Calculate the moisture addition rate a humidifier must supply to raise an airstream's humidity by a target amount.", "url": "https://craftquantities.com/calculators/materials-quantities/humidifier-capacity-calculator/", "json": "https://craftquantities.com/api/v1/calculators/humidifier-capacity-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "hvac-condensate-drain-slope-calculator", "category": "materials-quantities", "title": "HVAC Condensate Drain Pipe Slope Calculator", "description": "Calculate the minimum required drop for an HVAC condensate drain line run, at the standard minimum slope of 1/8 in per foot (10 mm per metre).", "url": "https://craftquantities.com/calculators/materials-quantities/hvac-condensate-drain-slope-calculator/", "json": "https://craftquantities.com/api/v1/calculators/hvac-condensate-drain-slope-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "hvac-duct-cfm-calculator", "category": "plumbing-hvac", "title": "HVAC Duct Size Calculator", "description": "Find the recommended round duct diameter for a given airflow (CFM or L/s) and target air velocity.", "url": "https://craftquantities.com/calculators/plumbing-hvac/hvac-duct-cfm-calculator/", "json": "https://craftquantities.com/api/v1/calculators/hvac-duct-cfm-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "hvac-equipment-pad-footprint-calculator", "category": "materials-quantities", "title": "HVAC Equipment Pad/Curb Footprint Calculator", "description": "Calculate the footprint area needed for an equipment pad or roof curb, including the manufacturer's required service clearance.", "url": "https://craftquantities.com/calculators/materials-quantities/hvac-equipment-pad-footprint-calculator/", "json": "https://craftquantities.com/api/v1/calculators/hvac-equipment-pad-footprint-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "hvac-thermal-load-calculator", "category": "plumbing-hvac", "title": "HVAC Thermal Load (U-Value) Calculator", "description": "Compute heat transmission load through a building surface using the physics-based Q = U x A x ΔT formula.", "url": "https://craftquantities.com/calculators/plumbing-hvac/hvac-thermal-load-calculator/", "json": "https://craftquantities.com/api/v1/calculators/hvac-thermal-load-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "hydronic-expansion-tank-calculator", "category": "materials-quantities", "title": "Hydronic Closed-Loop Expansion Tank Sizing Calculator", "description": "Calculate the minimum total (nominal) tank volume for a closed-loop hydronic heating/cooling system's expansion tank.", "url": "https://craftquantities.com/calculators/materials-quantities/hydronic-expansion-tank-calculator/", "json": "https://craftquantities.com/api/v1/calculators/hydronic-expansion-tank-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "i-joist-bearing-length-calculator", "category": "materials-quantities", "title": "I-Joist Web Stiffener Bearing Length Calculator", "description": "Calculate the required bearing length for an I-joist reaction, to check whether a web stiffener is needed.", "url": "https://craftquantities.com/calculators/materials-quantities/i-joist-bearing-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/i-joist-bearing-length-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "i-joist-minimum-depth-calculator", "category": "materials-quantities", "title": "I-Joist Minimum Depth Selector", "description": "Estimate a minimum I-joist depth from a span/depth ratio rule of thumb — a pre-check, not a substitute for manufacturer span tables.", "url": "https://craftquantities.com/calculators/materials-quantities/i-joist-minimum-depth-calculator/", "json": "https://craftquantities.com/api/v1/calculators/i-joist-minimum-depth-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "ice-water-shield-calculator", "category": "renovation-construction", "title": "Ice & Water Shield Calculator", "description": "Estimate how many rolls of self-adhered ice & water shield membrane you need for your roof eaves.", "url": "https://craftquantities.com/calculators/renovation-construction/ice-water-shield-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ice-water-shield-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "icf-block-count-calculator", "category": "materials-quantities", "title": "Insulated Concrete Form (ICF) Block Count Calculator", "description": "Calculate how many ICF blocks are needed for a foundation or above-grade ICF wall.", "url": "https://craftquantities.com/calculators/materials-quantities/icf-block-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/icf-block-count-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "igu-argon-fill-calculator", "category": "materials-quantities", "title": "Insulated Glass Unit Argon Gas Fill Volume Calculator", "description": "Calculate the argon gas fill volume needed for an insulated glass unit's sealed cavity.", "url": "https://craftquantities.com/calculators/materials-quantities/igu-argon-fill-calculator/", "json": "https://craftquantities.com/api/v1/calculators/igu-argon-fill-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "igu-spacer-perimeter-calculator", "category": "materials-quantities", "title": "Insulated Glass Unit (IGU) Spacer Bar Perimeter Calculator", "description": "Calculate the total spacer bar length needed for a batch of insulated glass units.", "url": "https://craftquantities.com/calculators/materials-quantities/igu-spacer-perimeter-calculator/", "json": "https://craftquantities.com/api/v1/calculators/igu-spacer-perimeter-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "igu-spacer-sizing-calculator", "category": "materials-quantities", "title": "Insulated Glass Unit (IGU) Spacer Bar Sizing Calculator", "description": "Calculate the spacer bar width needed for an insulated glass unit given the target overall unit thickness and pane thicknesses.", "url": "https://craftquantities.com/calculators/materials-quantities/igu-spacer-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/igu-spacer-sizing-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "imperial-gallons-to-liters-calculator", "category": "measurements-conversions", "title": "Imperial Gallons to Litres Calculator", "description": "Convert UK imperial gallons to litres for tank ratings, older plant and pre-metric specifications.", "url": "https://craftquantities.com/calculators/measurements-conversions/imperial-gallons-to-liters-calculator/", "json": "https://craftquantities.com/api/v1/calculators/imperial-gallons-to-liters-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-11" }, { "slug": "inch-fraction-to-mm-calculator", "category": "measurements-conversions", "title": "Inch Fraction to Millimetres Calculator", "description": "Convert an inch measurement — including sixteenths and thirty-seconds — into millimetres for metric drawings and tooling.", "url": "https://craftquantities.com/calculators/measurements-conversions/inch-fraction-to-mm-calculator/", "json": "https://craftquantities.com/api/v1/calculators/inch-fraction-to-mm-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "inches-to-centimeters-calculator", "category": "measurements-conversions", "title": "Inches to Centimetres Calculator", "description": "Convert inches to centimetres for metric suppliers, spec sheets and shipping dimensions.", "url": "https://craftquantities.com/calculators/measurements-conversions/inches-to-centimeters-calculator/", "json": "https://craftquantities.com/api/v1/calculators/inches-to-centimeters-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-11" }, { "slug": "inches-to-feet-calculator", "category": "measurements-conversions", "title": "Inches to Feet Calculator", "description": "Convert inches into decimal feet and into feet-and-inches, the two forms a dimension has to take on a drawing and on a tape.", "url": "https://craftquantities.com/calculators/measurements-conversions/inches-to-feet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/inches-to-feet-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-12" }, { "slug": "inches-to-millimeters-calculator", "category": "measurements-conversions", "title": "Inches to Millimetres Calculator", "description": "Convert inches to millimetres for metric drawings, fixings and imported components.", "url": "https://craftquantities.com/calculators/measurements-conversions/inches-to-millimeters-calculator/", "json": "https://craftquantities.com/api/v1/calculators/inches-to-millimeters-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "infinite-slope-stability-calculator", "category": "materials-quantities", "title": "Infinite Slope Stability Factor of Safety Calculator", "description": "Estimate the factor of safety against sliding for a long, uniform, cohesionless (dry) slope.", "url": "https://craftquantities.com/calculators/materials-quantities/infinite-slope-stability-calculator/", "json": "https://craftquantities.com/api/v1/calculators/infinite-slope-stability-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-03" }, { "slug": "insulation-batt-calculator", "category": "insulation-efficiency", "title": "Insulation Batt Calculator", "description": "Estimate how many packages of batt insulation you need to cover an area, using your product's stated coverage.", "url": "https://craftquantities.com/calculators/insulation-efficiency/insulation-batt-calculator/", "json": "https://craftquantities.com/api/v1/calculators/insulation-batt-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "insulation-thickness-target-u-value-calculator", "category": "insulation-efficiency", "title": "Insulation Thickness for a Target U-Value Calculator (BS EN ISO 6946)", "description": "The insulation thickness a target U-value needs, from the other layers and the product's conductivity, and the U-value a board you can buy reaches.", "url": "https://craftquantities.com/calculators/insulation-efficiency/insulation-thickness-target-u-value-calculator/", "json": "https://craftquantities.com/api/v1/calculators/insulation-thickness-target-u-value-calculator.json", "inputCount": 6, "testCaseCount": 5, "sourceCount": 3, "lastVerified": "2026-09-22" }, { "slug": "insurance-replacement-cost-calculator", "category": "financial-adjacent", "title": "Homeowners Insurance Replacement Cost Calculator", "description": "Get a rough estimate of your home's rebuild cost, a starting point for dwelling coverage amounts.", "url": "https://craftquantities.com/calculators/financial-adjacent/insurance-replacement-cost-calculator/", "json": "https://craftquantities.com/api/v1/calculators/insurance-replacement-cost-calculator.json", "inputCount": 2, "testCaseCount": 2, 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"https://craftquantities.com/calculators/materials-quantities/intumescent-coating-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/intumescent-coating-volume-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "inverter-sizing-calculator", "category": "solar-energy", "title": "Solar Inverter Sizing Calculator", "description": "Size an inverter to an array, including the deliberate over-sizing of DC to AC that improves real yield.", "url": "https://craftquantities.com/calculators/solar-energy/inverter-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/inverter-sizing-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-08-27" }, { "slug": "irregular-area-offsets-coordinates-calculator", "category": "measurements-conversions", "title": "Irregular Area Calculator (Offsets and Coordinates)", "description": "The area of a plot, bed or slab that is not a rectangle, from offsets off a baseline by the trapezoidal or Simpson's rule, or from its corner coordinates.", "url": "https://craftquantities.com/calculators/measurements-conversions/irregular-area-offsets-coordinates-calculator/", "json": "https://craftquantities.com/api/v1/calculators/irregular-area-offsets-coordinates-calculator.json", "inputCount": 32, "testCaseCount": 5, "sourceCount": 2, "lastVerified": "2026-09-22" }, { "slug": "irrigation-zone-calculator", "category": "landscaping-outdoor", "title": "Irrigation Zone Calculator", "description": "Find how many sprinkler heads can run on one irrigation zone based on your available water flow.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/irrigation-zone-calculator/", "json": "https://craftquantities.com/api/v1/calculators/irrigation-zone-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "jersey-barrier-segment-calculator", "category": "materials-quantities", "title": "Concrete Barrier (Jersey Barrier) Segment Count Calculator", "description": "Calculate how many standard-length precast concrete barrier segments are needed for a run.", "url": "https://craftquantities.com/calculators/materials-quantities/jersey-barrier-segment-calculator/", "json": "https://craftquantities.com/api/v1/calculators/jersey-barrier-segment-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "kilograms-per-cubic-meter-to-pcf-calculator", "category": "measurements-conversions", "title": "kg/m³ to pcf Calculator", "description": "Convert a density in kilograms per cubic metre to pounds per cubic foot, for concrete mixes, aggregates and soils specified in metric.", "url": "https://craftquantities.com/calculators/measurements-conversions/kilograms-per-cubic-meter-to-pcf-calculator/", "json": "https://craftquantities.com/api/v1/calculators/kilograms-per-cubic-meter-to-pcf-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "kilograms-per-meter-to-pounds-per-foot-calculator", "category": "measurements-conversions", "title": "Kilograms per Metre to Pounds per Foot Calculator", "description": "Convert steel section mass per metre into pounds per foot for AISC tables, US mill pricing and lift sheets.", "url": "https://craftquantities.com/calculators/measurements-conversions/kilograms-per-meter-to-pounds-per-foot-calculator/", "json": "https://craftquantities.com/api/v1/calculators/kilograms-per-meter-to-pounds-per-foot-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "kilograms-per-square-meter-to-pounds-per-square-foot-calculator", "category": "measurements-conversions", "title": "kg/m² to lb/ft² Calculator", "description": "Convert an area weight in kg/m² to lb/ft², for glass, cladding panels and wall build-ups quoted on metric datasheets.", "url": "https://craftquantities.com/calculators/measurements-conversions/kilograms-per-square-meter-to-pounds-per-square-foot-calculator/", "json": "https://craftquantities.com/api/v1/calculators/kilograms-per-square-meter-to-pounds-per-square-foot-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "kilograms-to-pounds-calculator", "category": "measurements-conversions", "title": "Kilograms to Pounds Calculator", "description": "Convert kilograms to pounds for US equipment ratings, shipping and payload checks.", "url": "https://craftquantities.com/calculators/measurements-conversions/kilograms-to-pounds-calculator/", "json": "https://craftquantities.com/api/v1/calculators/kilograms-to-pounds-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "kilometers-to-miles-calculator", "category": "measurements-conversions", "title": "Kilometres to Miles Calculator", "description": "Convert a distance in kilometres into miles, for reading metric route and radius figures in imperial markets.", "url": "https://craftquantities.com/calculators/measurements-conversions/kilometers-to-miles-calculator/", "json": "https://craftquantities.com/api/v1/calculators/kilometers-to-miles-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-12" }, { "slug": "king-post-truss-calculator", "category": "materials-quantities", "title": "King Post Truss Member Length Calculator", "description": "Calculate top chord and king post member lengths for a simple king post roof truss.", "url": "https://craftquantities.com/calculators/materials-quantities/king-post-truss-calculator/", "json": "https://craftquantities.com/api/v1/calculators/king-post-truss-calculator.json", "inputCount": 2, "testCaseCount": 2, 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"https://craftquantities.com/api/v1/calculators/kitchen-hood-exhaust-cfm-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "kitchen-remodel-cost-calculator", "category": "financial-adjacent", "title": "Kitchen Remodel Cost Calculator", "description": "Price a kitchen from cabinet runs, worktop area and the trades behind the walls — the costs that outlast the doors.", "url": "https://craftquantities.com/calculators/financial-adjacent/kitchen-remodel-cost-calculator/", "json": "https://craftquantities.com/api/v1/calculators/kitchen-remodel-cost-calculator.json", "inputCount": 10, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "kitchen-unit-run-calculator", "category": "renovation-construction", "title": "Kitchen Unit and Cabinet Run Calculator", "description": "How many base and wall units (cabinets) of standard widths fill a straight, L or U kitchen, with the worktop, plinth (toe kick), cornice and panels.", "url": "https://craftquantities.com/calculators/renovation-construction/kitchen-unit-run-calculator/", "json": "https://craftquantities.com/api/v1/calculators/kitchen-unit-run-calculator.json", "inputCount": 24, "testCaseCount": 17, "sourceCount": 10, "lastVerified": "2026-09-26" }, { "slug": "kn-to-kips-calculator", "category": "measurements-conversions", "title": "kN to Kips Calculator", "description": "Convert a kilonewton load into kips for reading against US structural tables, anchor submittals and AISC capacities.", "url": "https://craftquantities.com/calculators/measurements-conversions/kn-to-kips-calculator/", "json": "https://craftquantities.com/api/v1/calculators/kn-to-kips-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "kn-to-pounds-force-calculator", "category": "measurements-conversions", "title": "kN to Pounds-Force Calculator", "description": "Convert a kilonewton load into pounds-force for reading manufacturer anchor, fastener and hardware capacities.", "url": "https://craftquantities.com/calculators/measurements-conversions/kn-to-pounds-force-calculator/", "json": "https://craftquantities.com/api/v1/calculators/kn-to-pounds-force-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "kpa-to-psf-calculator", "category": "measurements-conversions", "title": "kPa to psf Bearing Pressure Calculator", "description": "Convert soil bearing pressure and floor loads from kilopascals to pounds per square foot for US foundation and framing design.", "url": "https://craftquantities.com/calculators/measurements-conversions/kpa-to-psf-calculator/", "json": "https://craftquantities.com/api/v1/calculators/kpa-to-psf-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "kva-to-kw-calculator", "category": "electrical", "title": "kVA to kW Calculator", "description": "Convert apparent power in kVA into real power in kW at the power factor you enter: 0.8 for a three-phase generator's badge, 1 for a single-phase one's.", "url": "https://craftquantities.com/calculators/electrical/kva-to-kw-calculator/", "json": "https://craftquantities.com/api/v1/calculators/kva-to-kw-calculator.json", "inputCount": 2, "testCaseCount": 5, "sourceCount": 3, "lastVerified": "2026-10-05" }, { "slug": "kw-to-btu-calculator", "category": "plumbing-hvac", "title": "kW to BTU/hr Calculator", "description": "Convert a metric kilowatt heating or cooling output into BTU per hour for specifying US equipment.", "url": "https://craftquantities.com/calculators/plumbing-hvac/kw-to-btu-calculator/", "json": "https://craftquantities.com/api/v1/calculators/kw-to-btu-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "kw-to-hp-calculator", "category": "measurements-conversions", "title": "kW to 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"https://craftquantities.com/api/v1/calculators/landscape-lighting-wire-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "lap-siding-fastener-schedule-calculator", "category": "materials-quantities", "title": "Lap Siding Fastener Schedule Calculator", "description": "Derive fastener count and boxes for a lap-clad elevation from its own geometry — height, run, exposure and stud spacing.", "url": "https://craftquantities.com/calculators/materials-quantities/lap-siding-fastener-schedule-calculator/", "json": "https://craftquantities.com/api/v1/calculators/lap-siding-fastener-schedule-calculator.json", "inputCount": 8, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-06" }, { "slug": "lawn-edging-calculator", "category": "materials-quantities", "title": "Lawn Edging Calculator", "description": "Coils or straight lengths of lawn and bed edging for a measured edge, straight or curved, open or a closed bed, with the joints and the stakes along it.", "url": "https://craftquantities.com/calculators/materials-quantities/lawn-edging-calculator/", "json": "https://craftquantities.com/api/v1/calculators/lawn-edging-calculator.json", "inputCount": 6, "testCaseCount": 5, "sourceCount": 1, "lastVerified": "2026-09-26" }, { "slug": "lawn-fertiliser-calculator", "category": "landscaping-outdoor", "title": "Lawn Fertiliser Calculator", "description": "Work out how much of a given N-P-K product delivers the nitrogen rate a lawn actually needs.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/lawn-fertiliser-calculator/", "json": "https://craftquantities.com/api/v1/calculators/lawn-fertiliser-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "lawn-mowing-time-calculator", "category": "landscaping-outdoor", "title": "Lawn Mowing Time Calculator", "description": "Estimate how long it takes to mow a lawn based on its area, 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"https://craftquantities.com/api/v1/calculators/leed-recycled-content-value-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-08-27" }, { "slug": "light-gauge-track-linear-footage-calculator", "category": "materials-quantities", "title": "Light-Gauge Steel Track Linear Footage Calculator", "description": "Calculate total top and bottom track length needed for a cold-formed steel stud wall run.", "url": "https://craftquantities.com/calculators/materials-quantities/light-gauge-track-linear-footage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/light-gauge-track-linear-footage-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "lighting-circuit-load-calculator", "category": "materials-quantities", "title": "Lighting Circuit Connected Load Calculator", "description": "Calculate a lighting circuit's total connected load and check it against the standard 80% continuous-load derating limit.", "url": "https://craftquantities.com/calculators/materials-quantities/lighting-circuit-load-calculator/", "json": "https://craftquantities.com/api/v1/calculators/lighting-circuit-load-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "lighting-illuminance-calculator", "category": "materials-quantities", "title": "Lighting Illuminance (Lux) Calculator", "description": "Calculate the average illuminance a lighting layout provides across a room area.", "url": "https://craftquantities.com/calculators/materials-quantities/lighting-illuminance-calculator/", "json": "https://craftquantities.com/api/v1/calculators/lighting-illuminance-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "lightning-rod-protection-calculator", "category": "materials-quantities", "title": "Lightning Rod (Air Terminal) Cone of Protection Calculator", "description": "Calculate the protected radius at ground level from a lightning air terminal, using the classical cone-of-protection method.", "url": "https://craftquantities.com/calculators/materials-quantities/lightning-rod-protection-calculator/", "json": "https://craftquantities.com/api/v1/calculators/lightning-rod-protection-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "lime-mortar-mix-calculator", "category": "materials-quantities", "title": "Lime Mortar Mix Calculator (NHL and Lime Putty)", "description": "Natural hydraulic lime bags or lime putty tubs and the sand to gauge them, for lime mortar at 1 : 2, 1 : 2½ or 1 : 3, by the maker's measured yield.", "url": "https://craftquantities.com/calculators/materials-quantities/lime-mortar-mix-calculator/", "json": "https://craftquantities.com/api/v1/calculators/lime-mortar-mix-calculator.json", "inputCount": 11, "testCaseCount": 4, "sourceCount": 10, "lastVerified": "2026-09-28" }, { "slug": "lime-stabilization-calculator", "category": "materials-quantities", "title": "Soil Stabilization Lime Content Calculator", "description": "Calculate the lime mass needed to stabilize a given volume of soil at a target lime content percentage.", "url": "https://craftquantities.com/calculators/materials-quantities/lime-stabilization-calculator/", "json": "https://craftquantities.com/api/v1/calculators/lime-stabilization-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "line-striping-paint-calculator", "category": "auto-utility", "title": "Line Striping Paint Calculator", "description": "Estimate how many gallons or litres of line-striping paint you need for parking spaces or driveway markings.", "url": "https://craftquantities.com/calculators/auto-utility/line-striping-paint-calculator/", "json": "https://craftquantities.com/api/v1/calculators/line-striping-paint-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "linear-feet-to-studs-16-oc-calculator", "category": "renovation-construction", "title": "Linear Feet to Studs Calculator (16 in OC)", "description": "Convert wall length into a stud count at 16 inch centres, before adding for openings and corners.", "url": "https://craftquantities.com/calculators/renovation-construction/linear-feet-to-studs-16-oc-calculator/", "json": "https://craftquantities.com/api/v1/calculators/linear-feet-to-studs-16-oc-calculator.json", "inputCount": 1, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-06" }, { "slug": "lintel-bearing-length-calculator", "category": "materials-quantities", "title": "Masonry Lintel Bearing Length Checker", "description": "Check whether a lintel's end bearing length meets standard code minimums.", "url": "https://craftquantities.com/calculators/materials-quantities/lintel-bearing-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/lintel-bearing-length-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "lintel-load-capacity-calculator", "category": "materials-quantities", "title": "Masonry Lintel Uniform Load Capacity Calculator", "description": "Compute the maximum uniform load a lintel of known allowable moment capacity can safely carry over a given span.", "url": "https://craftquantities.com/calculators/materials-quantities/lintel-load-capacity-calculator/", "json": "https://craftquantities.com/api/v1/calculators/lintel-load-capacity-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "liquid-waterproofing-volume-calculator", "category": "materials-quantities", "title": "Cold-Applied Liquid Waterproofing Membrane Volume Calculator", "description": "Calculate the liquid waterproofing material needed to achieve a target dry film thickness, accounting for solids content.", "url": "https://craftquantities.com/calculators/materials-quantities/liquid-waterproofing-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/liquid-waterproofing-volume-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "liters-per-100km-to-mpg-calculator", "category": "auto-utility", "title": "L/100km to MPG Calculator", "description": "Convert metric fuel consumption to US miles per gallon for plant and vehicle running costs.", "url": "https://craftquantities.com/calculators/auto-utility/liters-per-100km-to-mpg-calculator/", "json": "https://craftquantities.com/api/v1/calculators/liters-per-100km-to-mpg-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "liters-per-minute-to-gpm-calculator", "category": "plumbing-hvac", "title": "Litres per Minute to GPM Calculator", "description": "Convert metric flow rates into US gallons per minute for American pump and fixture data.", "url": "https://craftquantities.com/calculators/plumbing-hvac/liters-per-minute-to-gpm-calculator/", "json": "https://craftquantities.com/api/v1/calculators/liters-per-minute-to-gpm-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "liters-per-second-to-cfm-calculator", "category": "measurements-conversions", "title": "Litres per Second to CFM Calculator", "description": "Convert a ventilation duty in L/s into CFM for selecting North American fans, grilles, diffusers and filters.", "url": "https://craftquantities.com/calculators/measurements-conversions/liters-per-second-to-cfm-calculator/", "json": "https://craftquantities.com/api/v1/calculators/liters-per-second-to-cfm-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "liters-per-second-to-cubic-meters-per-hour-calculator", "category": "measurements-conversions", "title": "Litres per Second to Cubic Metres per Hour Calculator", "description": "Convert a flow rate in litres per second into cubic metres per hour — the two metric flow units that never appear on the same data sheet.", "url": "https://craftquantities.com/calculators/measurements-conversions/liters-per-second-to-cubic-meters-per-hour-calculator/", "json": "https://craftquantities.com/api/v1/calculators/liters-per-second-to-cubic-meters-per-hour-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-12" }, { "slug": "liters-to-cubic-feet-calculator", "category": "measurements-conversions", "title": "Litres to Cubic Feet Calculator", "description": "Convert litres to cubic feet to read a metric bag, drum or tank size against American plans and product ratings.", "url": "https://craftquantities.com/calculators/measurements-conversions/liters-to-cubic-feet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/liters-to-cubic-feet-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-09-16" }, { "slug": "liters-to-imperial-gallons-calculator", "category": "measurements-conversions", "title": "Litres to Imperial Gallons Calculator", "description": "Convert litres into UK imperial gallons to check a metric volume against a British rating plate.", "url": "https://craftquantities.com/calculators/measurements-conversions/liters-to-imperial-gallons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/liters-to-imperial-gallons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-11" }, { "slug": "liters-to-us-gallons-calculator", "category": "measurements-conversions", "title": "Litres to US Gallons Calculator", "description": "Convert litres to US gallons for American product sizes, coverage rates and tank ratings.", "url": "https://craftquantities.com/calculators/measurements-conversions/liters-to-us-gallons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/liters-to-us-gallons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "livestock-fence-wire-calculator", "category": "auto-utility", "title": "Livestock Fence Wire Calculator", "description": "Estimate how many rolls of wire you need for a multi-strand electric or woven-wire livestock fence.", "url": "https://craftquantities.com/calculators/auto-utility/livestock-fence-wire-calculator/", "json": "https://craftquantities.com/api/v1/calculators/livestock-fence-wire-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "loan-to-value-and-deposit-calculator", "category": "financial-adjacent", "title": "Loan-to-Value & Deposit Calculator", "description": "Work out your LVR, the deposit needed to reach a target band, and whether mortgage insurance is triggered.", "url": "https://craftquantities.com/calculators/financial-adjacent/loan-to-value-and-deposit-calculator/", "json": "https://craftquantities.com/api/v1/calculators/loan-to-value-and-deposit-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-06" }, { "slug": "loft-conversion-cost-calculator", "category": "financial-adjacent", "title": "Loft Conversion Cost Calculator", "description": "Cost a loft conversion including the two items that decide the whole scheme: the new floor structure and the staircase you must find room for.", "url": "https://craftquantities.com/calculators/financial-adjacent/loft-conversion-cost-calculator/", "json": "https://craftquantities.com/api/v1/calculators/loft-conversion-cost-calculator.json", "inputCount": 8, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "low-slope-cricket-taper-calculator", "category": "materials-quantities", "title": "Low-Slope Roof Cricket Taper Calculator", "description": "Cricket thickness at a curb on a nearly flat roof, plus the tapered board courses that build it and whether the run available is enough.", "url": "https://craftquantities.com/calculators/materials-quantities/low-slope-cricket-taper-calculator/", "json": "https://craftquantities.com/api/v1/calculators/low-slope-cricket-taper-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-02" }, { "slug": "lumber-dimensional-size-calculator", "category": "measurements-conversions", "title": "Lumber Dimensional Size Calculator", "description": "Look up the actual (dressed) size of a nominal lumber dimension like a 2x4.", "url": "https://craftquantities.com/calculators/measurements-conversions/lumber-dimensional-size-calculator/", "json": "https://craftquantities.com/api/v1/calculators/lumber-dimensional-size-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "lumber-weight-calculator", "category": "materials-quantities", "title": "Lumber Weight Calculator — Timber Weight by Species and Moisture", "description": "What a board, stud, beam or pole weighs from its size, species and moisture content, by the USDA Wood Handbook's own method for the density of wood.", "url": "https://craftquantities.com/calculators/materials-quantities/lumber-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/lumber-weight-calculator.json", "inputCount": 9, "testCaseCount": 72, "sourceCount": 3, "lastVerified": "2026-10-05" }, { "slug": "lumen-method-lighting-calculator", "category": "electrical", "title": "Lumen Method Lighting Calculator (Room Index, Luminaire Count and Spacing)", "description": "How many luminaires a room needs for a target average illuminance by the lumen method, with the room index and a grid inside the spacing-to-height ratio.", "url": "https://craftquantities.com/calculators/electrical/lumen-method-lighting-calculator/", "json": "https://craftquantities.com/api/v1/calculators/lumen-method-lighting-calculator.json", "inputCount": 9, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-09-22" }, { "slug": "lux-to-foot-candles-calculator", "category": "measurements-conversions", "title": "Lux to Foot-Candles Calculator", "description": "Convert an illuminance in lux into foot-candles, for reading a metric lighting level against a North American specification.", "url": "https://craftquantities.com/calculators/measurements-conversions/lux-to-foot-candles-calculator/", "json": "https://craftquantities.com/api/v1/calculators/lux-to-foot-candles-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-12" }, { "slug": "manhole-ring-segment-calculator", "category": "materials-quantities", "title": "Manhole Ring/Riser Segment Calculator", "description": "Calculate how many standard riser rings are needed to build a manhole to its required depth.", "url": "https://craftquantities.com/calculators/materials-quantities/manhole-ring-segment-calculator/", "json": "https://craftquantities.com/api/v1/calculators/manhole-ring-segment-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "mansard-roof-rafter-calculator", "category": "materials-quantities", "title": "Mansard Roof Rafter Geometry Calculator", "description": "Calculate total rafter length for a mansard roof's steep near-vertical lower segment plus shallow upper segment.", "url": "https://craftquantities.com/calculators/materials-quantities/mansard-roof-rafter-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mansard-roof-rafter-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "manual-j-screening-calculator", "category": "plumbing-hvac", "title": "Heating & Cooling Load Screening Calculator", "description": "Estimate whole-house heating and cooling loads from envelope areas and U-values — a screening check against a contractor's figure.", "url": "https://craftquantities.com/calculators/plumbing-hvac/manual-j-screening-calculator/", "json": "https://craftquantities.com/api/v1/calculators/manual-j-screening-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-08-26" }, { "slug": "masking-and-protection-calculator", "category": "renovation-construction", "title": "Masking and Protection Materials Calculator", "description": "Dust sheets, masking tape and floor protection for a room — counted from the edges and the floor, because tape follows lines and sheeting follows area.", "url": "https://craftquantities.com/calculators/renovation-construction/masking-and-protection-calculator/", "json": "https://craftquantities.com/api/v1/calculators/masking-and-protection-calculator.json", "inputCount": 7, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-23" }, { "slug": "masonry-bond-beam-rebar-calculator", "category": "materials-quantities", "title": "Masonry Bond Beam Rebar Calculator", "description": "Estimate the rebar length and mass needed for horizontal bond beam courses in a reinforced CMU wall.", "url": "https://craftquantities.com/calculators/materials-quantities/masonry-bond-beam-rebar-calculator/", "json": "https://craftquantities.com/api/v1/calculators/masonry-bond-beam-rebar-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "masonry-control-joint-spacing-calculator", "category": "materials-quantities", "title": "Masonry Control Joint Spacing Calculator", "description": "Estimate the number of vertical control joints needed in a CMU wall, using a common simplified spacing guideline.", "url": "https://craftquantities.com/calculators/materials-quantities/masonry-control-joint-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/masonry-control-joint-spacing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "masonry-grout-mix-calculator", "category": "materials-quantities", "title": "Masonry Grout Mix Calculator — ASTM C476 Fine and Coarse", "description": "Cement and aggregate for fine or coarse masonry grout by ASTM C476 proportions, with the slump the standard asks for and the lifts the pour is placed in.", "url": "https://craftquantities.com/calculators/materials-quantities/masonry-grout-mix-calculator/", "json": "https://craftquantities.com/api/v1/calculators/masonry-grout-mix-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 4, "lastVerified": "2026-09-15" }, { "slug": "masonry-pier-axial-capacity-calculator", "category": "materials-quantities", "title": "Masonry Pier Axial Capacity Calculator", "description": "Estimate the allowable axial load capacity of a short, unreinforced masonry pier.", "url": "https://craftquantities.com/calculators/materials-quantities/masonry-pier-axial-capacity-calculator/", "json": "https://craftquantities.com/api/v1/calculators/masonry-pier-axial-capacity-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "masonry-prism-ht-ratio-calculator", "category": "materials-quantities", "title": "Masonry Prism Height-to-Thickness Ratio Validity Checker", "description": "Check whether a masonry prism test specimen's height-to-thickness ratio falls within the valid ASTM C1314 test range.", "url": "https://craftquantities.com/calculators/materials-quantities/masonry-prism-ht-ratio-calculator/", "json": "https://craftquantities.com/api/v1/calculators/masonry-prism-ht-ratio-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "masonry-shear-capacity-calculator", "category": "materials-quantities", "title": "Masonry Wall In-Plane Shear Capacity Calculator", "description": "Estimate a masonry wall's allowable in-plane shear capacity from its net shear area and specified compressive strength.", "url": "https://craftquantities.com/calculators/materials-quantities/masonry-shear-capacity-calculator/", "json": "https://craftquantities.com/api/v1/calculators/masonry-shear-capacity-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "mass-concrete-thermal-gradient-calculator", "category": "materials-quantities", "title": "Mass Concrete Thermal Gradient Calculator", "description": "Check a mass concrete pour's core-to-surface temperature differential against the standard cracking-risk threshold.", "url": "https://craftquantities.com/calculators/materials-quantities/mass-concrete-thermal-gradient-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mass-concrete-thermal-gradient-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "material-price-escalation-calculator", "category": "financial-adjacent", "title": "Material Price Escalation Calculator", "description": "Adjust an old material quote for price inflation to estimate today's likely cost.", "url": "https://craftquantities.com/calculators/financial-adjacent/material-price-escalation-calculator/", "json": "https://craftquantities.com/api/v1/calculators/material-price-escalation-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "material-volume-to-weight-calculator", "category": "measurements-conversions", "title": "Material Volume to Weight Calculator", "description": "Convert a cubic yard quantity of gravel, sand, topsoil, or mulch into an estimated weight in tons.", "url": "https://craftquantities.com/calculators/measurements-conversions/material-volume-to-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/material-volume-to-weight-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "material-waste-cost-calculator", "category": "financial-adjacent", "title": "Material Waste Cost Calculator", "description": "Find the total material budget needed after accounting for a waste percentage.", "url": "https://craftquantities.com/calculators/financial-adjacent/material-waste-cost-calculator/", "json": "https://craftquantities.com/api/v1/calculators/material-waste-cost-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "material-weight-calculator", "category": "materials-quantities", "title": "Material Weight Calculator", "description": "Convert a volume of bulk material into weight using published densities — for delivery limits, skip loading and floor capacity.", "url": "https://craftquantities.com/calculators/materials-quantities/material-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/material-weight-calculator.json", "inputCount": 2, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "medical-gas-purge-volume-calculator", "category": "materials-quantities", "title": "Medical Gas Pipeline Nitrogen Purge Volume Calculator", "description": "Calculate the nitrogen purge gas volume needed to clear a medical gas copper pipeline before commissioning.", "url": "https://craftquantities.com/calculators/materials-quantities/medical-gas-purge-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/medical-gas-purge-volume-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "membrane-penetration-box-area-calculator", "category": "materials-quantities", "title": "Firestop Membrane Penetration Box Area Calculator", "description": "Check the electrical boxes in a fire-rated wall against the opening-area cap for that wall area and the separation between boxes on opposite faces.", "url": "https://craftquantities.com/calculators/materials-quantities/membrane-penetration-box-area-calculator/", "json": "https://craftquantities.com/api/v1/calculators/membrane-penetration-box-area-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-02" }, { "slug": "metal-roof-panel-calculator", "category": "renovation-construction", "title": "Metal Roof Panel Calculator", "description": "Count standing-seam or corrugated panels for a roof slope, allowing for side laps and the ridge overlap.", "url": "https://craftquantities.com/calculators/renovation-construction/metal-roof-panel-calculator/", "json": "https://craftquantities.com/api/v1/calculators/metal-roof-panel-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "metalwork-railing-paint-calculator", "category": "renovation-construction", "title": "Metalwork and Railing Paint Calculator", "description": "Paint for railings, gates and structural steel from length and girth, the way metalwork is measured, because a balustrade has no area to read off.", "url": "https://craftquantities.com/calculators/renovation-construction/metalwork-railing-paint-calculator/", "json": "https://craftquantities.com/api/v1/calculators/metalwork-railing-paint-calculator.json", "inputCount": 8, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-23" }, { "slug": "meters-per-second-to-feet-per-minute-calculator", "category": "measurements-conversions", "title": "Metres per Second to Feet per Minute Calculator", "description": "Convert duct and pipe face velocities from metres per second into feet per minute for American HVAC data.", "url": "https://craftquantities.com/calculators/measurements-conversions/meters-per-second-to-feet-per-minute-calculator/", "json": "https://craftquantities.com/api/v1/calculators/meters-per-second-to-feet-per-minute-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "meters-to-feet-calculator", "category": "measurements-conversions", "title": "Metres to Feet Calculator", "description": "Convert metres to feet for reading metric drawings against imperial stock and tools.", "url": "https://craftquantities.com/calculators/measurements-conversions/meters-to-feet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/meters-to-feet-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "meters-to-yards-calculator", "category": "measurements-conversions", "title": "Metres to Yards Calculator", "description": "Convert a metric length into linear yards to price a metric take-off against a US roll rate.", "url": "https://craftquantities.com/calculators/measurements-conversions/meters-to-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/meters-to-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-11" }, { "slug": "miles-to-kilometers-calculator", "category": "measurements-conversions", "title": "Miles to Kilometres Calculator", "description": "Convert a distance in miles into kilometres — for haul routes, mobilisation charges and delivery radii.", "url": "https://craftquantities.com/calculators/measurements-conversions/miles-to-kilometers-calculator/", "json": "https://craftquantities.com/api/v1/calculators/miles-to-kilometers-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-12" }, { "slug": "millimeters-to-centimeters-calculator", "category": "measurements-conversions", "title": "Millimetres to Centimetres Calculator", "description": "Convert a millimetre drawing dimension into centimetres for a tape, a ruler or a rough check.", "url": "https://craftquantities.com/calculators/measurements-conversions/millimeters-to-centimeters-calculator/", "json": "https://craftquantities.com/api/v1/calculators/millimeters-to-centimeters-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-11" }, { "slug": "millimeters-to-inches-calculator", "category": "measurements-conversions", "title": "Millimetres to Inches Calculator", "description": "Convert millimetres to decimal inches for working from metric drawings on imperial tools.", "url": "https://craftquantities.com/calculators/measurements-conversions/millimeters-to-inches-calculator/", "json": "https://craftquantities.com/api/v1/calculators/millimeters-to-inches-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "mineral-wool-batt-calculator", "category": "materials-quantities", "title": "Mineral Wool Insulation Batt Calculator", "description": "Calculate how many packages of mineral wool (rock/stone wool) batt insulation are needed to cover an area.", "url": "https://craftquantities.com/calculators/materials-quantities/mineral-wool-batt-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mineral-wool-batt-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "mineral-wool-board-calculator", "category": "insulation-efficiency", "title": "Exterior Mineral Wool Board Insulation Calculator", "description": "Count semi-rigid mineral wool boards for continuous exterior insulation, including multi-layer build-ups with staggered joints.", "url": "https://craftquantities.com/calculators/insulation-efficiency/mineral-wool-board-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mineral-wool-board-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "mini-split-line-length-derating-calculator", "category": "materials-quantities", "title": "Mini-Split/VRF Line Set Length Derating Calculator", "description": "A mini-split or VRF system's derated capacity for line set length beyond the base allowance and for vertical rise, at the rates in the maker's manual.", "url": "https://craftquantities.com/calculators/materials-quantities/mini-split-line-length-derating-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mini-split-line-length-derating-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "mist-coat-calculator", "category": "renovation-construction", "title": "Mist Coat Calculator", "description": "Paint and water for a mist coat on new plaster — the thinned first coat, split into what you buy and what comes out of the tap.", "url": "https://craftquantities.com/calculators/renovation-construction/mist-coat-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mist-coat-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-23" }, { "slug": "miter-angle-calculator", "category": "renovation-construction", "title": "Miter Angle Calculator — Mitre Saw Corners, Frames and Crown", "description": "Mitre (miter) saw settings for any corner, every joint of a regular frame or polygon, and the mitre and bevel for crown moulding cut flat or nested.", "url": "https://craftquantities.com/calculators/renovation-construction/miter-angle-calculator/", "json": "https://craftquantities.com/api/v1/calculators/miter-angle-calculator.json", "inputCount": 5, "testCaseCount": 8, "sourceCount": 5, "lastVerified": "2026-10-05" }, { "slug": "mixed-air-temperature-calculator", "category": "materials-quantities", "title": "Mixed Air (Economizer) Temperature Calculator", "description": "Calculate the resulting mixed-air temperature when outdoor air and return air combine in an air handling unit.", "url": "https://craftquantities.com/calculators/materials-quantities/mixed-air-temperature-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mixed-air-temperature-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "mlv-soundproofing-calculator", "category": "materials-quantities", "title": "Mass-Loaded Vinyl (MLV) Soundproofing Barrier Calculator", "description": "Calculate the mass-loaded vinyl material needed for a wall or ceiling soundproofing barrier, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/mlv-soundproofing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mlv-soundproofing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "mm-to-inch-fraction-calculator", "category": "measurements-conversions", "title": "Millimetres to Inch Fraction Calculator", "description": "Convert a millimeter measurement to the nearest common fraction of an inch, like a tape measure reads.", "url": "https://craftquantities.com/calculators/measurements-conversions/mm-to-inch-fraction-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mm-to-inch-fraction-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "modified-bitumen-scrap-calculator", "category": "materials-quantities", "title": "Modified Bitumen Cap Sheet Scrap Factor Calculator", "description": "Calculate modified bitumen cap sheet material needed, including scrap allowance for granule loss during torch application.", "url": "https://craftquantities.com/calculators/materials-quantities/modified-bitumen-scrap-calculator/", "json": "https://craftquantities.com/api/v1/calculators/modified-bitumen-scrap-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "modified-plasticity-index-calculator", "category": "materials-quantities", "title": "Modified Plasticity Index Calculator (NHBC 4.2 Volume Change Potential)", "description": "Modified plasticity index from a clay's Ip and share passing 425 µm (No. 40), its NHBC 4.2 volume change band, and a tree's D/H and zone of influence.", "url": "https://craftquantities.com/calculators/materials-quantities/modified-plasticity-index-calculator/", "json": "https://craftquantities.com/api/v1/calculators/modified-plasticity-index-calculator.json", "inputCount": 6, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-22" }, { "slug": "modular-carpet-tile-calculator", "category": "materials-quantities", "title": "Modular Carpet Tile Layout Calculator", "description": "Calculate how many carpet tiles are needed for a floor, based on standard modular carpet tile size.", "url": "https://craftquantities.com/calculators/materials-quantities/modular-carpet-tile-calculator/", "json": "https://craftquantities.com/api/v1/calculators/modular-carpet-tile-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "mortar-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Mortar Cubic Yards to Tons Calculator", "description": "Convert a mortar volume into short tons for ordering, haulage and storage planning.", "url": "https://craftquantities.com/calculators/materials-quantities/mortar-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mortar-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "mortar-mix-calculator", "category": "materials-quantities", "title": "Mortar Mix Calculator (ASTM C270 Types M, S, N, O)", "description": "Batch quantities of cement, lime and sand for a mortar volume, by ASTM C270 type, using the proportion specification — with what each type is for.", "url": "https://craftquantities.com/calculators/materials-quantities/mortar-mix-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mortar-mix-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 4, "lastVerified": "2026-09-15" }, { "slug": "mortar-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Mortar Tons to Cubic Yards Calculator", "description": "Convert a mortar tonnage into cubic yards to check coverage, capacity and storage.", "url": "https://craftquantities.com/calculators/materials-quantities/mortar-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mortar-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "mortgage-affordability-calculator", "category": "financial-adjacent", "title": "Mortgage Affordability Calculator", "description": "Work out the loan a given income and deposit supports, using the debt-to-income limits lenders actually apply.", "url": "https://craftquantities.com/calculators/financial-adjacent/mortgage-affordability-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mortgage-affordability-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "mortgage-payment-calculator", "category": "financial-adjacent", "title": "Mortgage Payment Calculator", "description": "Work out the monthly payment on a repayment mortgage, and see how much of the term goes on interest.", "url": "https://craftquantities.com/calculators/financial-adjacent/mortgage-payment-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mortgage-payment-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "mosaic-sheet-calculator", "category": "renovation-construction", "title": "Mosaic Sheet Calculator", "description": "Sheets and boxes of mosaic for a wall or floor — with the lower waste a mesh-backed sheet earns, and the grout joint length nobody expects.", "url": "https://craftquantities.com/calculators/renovation-construction/mosaic-sheet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mosaic-sheet-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-23" }, { "slug": "motor-full-load-amps-calculator", "category": "materials-quantities", "title": "Three-Phase Motor Full-Load Amperage Calculator", "description": "Estimate a three-phase motor's full-load current draw from its horsepower, voltage, and efficiency.", "url": "https://craftquantities.com/calculators/materials-quantities/motor-full-load-amps-calculator/", "json": "https://craftquantities.com/api/v1/calculators/motor-full-load-amps-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "mpg-to-liters-per-100km-calculator", "category": "auto-utility", "title": "MPG to Litres per 100 km Calculator", "description": "Convert US miles per gallon into the litres-per-100-km figure used across Europe and Australia.", "url": "https://craftquantities.com/calculators/auto-utility/mpg-to-liters-per-100km-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mpg-to-liters-per-100km-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "mulch-calculator", "category": "landscaping-outdoor", "title": "Mulch Calculator", "description": "Work out how many bags, cubic yards or cubic metres of mulch a bed needs, at the depth that actually suppresses weeds.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/mulch-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mulch-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "mulch-cubic-yards-to-tons-calculator", "category": "landscaping-outdoor", "title": "Mulch Cubic Yards to Tons Calculator", "description": "Convert a mulch volume in cubic yards into short tons for suppliers who price by weight.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/mulch-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mulch-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "mulch-gravel-calculator", "category": "landscaping-outdoor", "title": "Mulch & Gravel Calculator", "description": "Estimate the mulch, gravel or soil needed to cover an area at a given depth, in cubic yards or cubic metres.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/mulch-gravel-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mulch-gravel-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "mulch-tons-to-cubic-yards-calculator", "category": "landscaping-outdoor", "title": "Mulch Tons to Cubic Yards Calculator", "description": "Convert a quoted mulch tonnage into cubic yards to check it covers your area.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/mulch-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mulch-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "mullion-deflection-calculator", "category": "materials-quantities", "title": "Structural Glazing Mullion Wind Load Deflection Calculator", "description": "Check a window/curtain wall mullion's calculated wind-load deflection against the standard L/175 glazing deflection limit.", "url": "https://craftquantities.com/calculators/materials-quantities/mullion-deflection-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mullion-deflection-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-22" }, { "slug": "mullion-stack-joint-gap-calculator", "category": "materials-quantities", "title": "Mullion Stack Joint Setting Gap Calculator", "description": "Work out the gap to set at a curtain wall stack joint against the thermometer reading on the day of installation, not against the season it happens to be.", "url": "https://craftquantities.com/calculators/materials-quantities/mullion-stack-joint-gap-calculator/", "json": "https://craftquantities.com/api/v1/calculators/mullion-stack-joint-gap-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-08-30" }, { "slug": "multi-stud-wall-stc-estimator", "category": "materials-quantities", "title": "Multi-Stud Wall Sound Transmission Class (STC) Estimator", "description": "Estimate an approximate STC rating for a multi-layer stud wall assembly from an additive rule-of-thumb point system.", "url": "https://craftquantities.com/calculators/materials-quantities/multi-stud-wall-stc-estimator/", "json": "https://craftquantities.com/api/v1/calculators/multi-stud-wall-stc-estimator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "negative-skin-friction-calculator", "category": "materials-quantities", "title": "Negative Skin Friction (Downdrag) Calculator", "description": "Estimate the additional downward load (downdrag) a settling soil layer imposes on a pile shaft, using the alpha method.", "url": "https://craftquantities.com/calculators/materials-quantities/negative-skin-friction-calculator/", "json": "https://craftquantities.com/api/v1/calculators/negative-skin-friction-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "off-grid-autonomy-calculator", "category": "solar-energy", "title": "Off-Grid Autonomy Calculator", "description": "Work out how long a battery bank runs a given load, and how much array is needed to replace it each day.", "url": "https://craftquantities.com/calculators/solar-energy/off-grid-autonomy-calculator/", "json": "https://craftquantities.com/api/v1/calculators/off-grid-autonomy-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-08-27" }, { "slug": "ohms-law-calculator", "category": "electrical", "title": "Ohm's Law Calculator", "description": "Enter voltage and resistance to get the current and power that follow from Ohm's Law.", "url": "https://craftquantities.com/calculators/electrical/ohms-law-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ohms-law-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "one-way-slab-thickness-calculator", "category": "materials-quantities", "title": "One-Way Slab Minimum Thickness Calculator (ACI 318)", "description": "Get the minimum slab thickness ACI 318 allows without an explicit deflection calculation, based on span and support condition.", "url": "https://craftquantities.com/calculators/materials-quantities/one-way-slab-thickness-calculator/", "json": "https://craftquantities.com/api/v1/calculators/one-way-slab-thickness-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "ontario-land-transfer-tax-calculator", "category": "financial-adjacent", "title": "Ontario Land Transfer Tax Calculator", "description": "Provincial land transfer tax on an Ontario property purchase, with the first-time buyer refund.", "url": "https://craftquantities.com/calculators/financial-adjacent/ontario-land-transfer-tax-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ontario-land-transfer-tax-calculator.json", "inputCount": 2, "testCaseCount": 6, "sourceCount": 2, "lastVerified": "2026-09-06" }, { "slug": "open-graded-bedding-course-calculator", "category": "materials-quantities", "title": "Open-Graded Bedding Course Stone Calculator", "description": "Loose volume and delivered tonnage of the screeded No. 8 bedding course under permeable pavers, with the allowance for it closing up under compaction.", "url": "https://craftquantities.com/calculators/materials-quantities/open-graded-bedding-course-calculator/", "json": "https://craftquantities.com/api/v1/calculators/open-graded-bedding-course-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-09-06" }, { "slug": "opening-flashing-membrane-calculator", "category": "materials-quantities", "title": "Window Opening Flashing Membrane Calculator", "description": "Self-adhered flashing for a schedule of openings, counted the way it is actually cut — sill, jambs and head, each running past the next.", "url": "https://craftquantities.com/calculators/materials-quantities/opening-flashing-membrane-calculator/", "json": "https://craftquantities.com/api/v1/calculators/opening-flashing-membrane-calculator.json", "inputCount": 8, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-02" }, { "slug": "operational-carbon-electricity-calculator", "category": "sustainability-compliance", "title": "Operational Carbon from Electricity Calculator", "description": "Convert annual electricity use into emissions at your grid's intensity, and see how a decarbonising grid changes it.", "url": "https://craftquantities.com/calculators/sustainability-compliance/operational-carbon-electricity-calculator/", "json": "https://craftquantities.com/api/v1/calculators/operational-carbon-electricity-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-08-27" }, { "slug": "osha-noise-dose-calculator", "category": "sustainability-compliance", "title": "OSHA Noise Dose and 8-Hour TWA Calculator", "description": "OSHA's noise dose and 8-hour TWA from periods at measured levels, on both the hearing-conservation and PEL bases, with the NIOSH figure beside them.", "url": "https://craftquantities.com/calculators/sustainability-compliance/osha-noise-dose-calculator/", "json": "https://craftquantities.com/api/v1/calculators/osha-noise-dose-calculator.json", "inputCount": 8, "testCaseCount": 5, "sourceCount": 4, "lastVerified": "2026-09-21" }, { "slug": "outdoor-string-light-calculator", "category": "electrical", "title": "Outdoor String Light Calculator", "description": "Estimate the total string light length and bulb count needed for a patio or backyard space.", "url": "https://craftquantities.com/calculators/electrical/outdoor-string-light-calculator/", "json": "https://craftquantities.com/api/v1/calculators/outdoor-string-light-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "outlet-spacing-calculator", "category": "electrical", "title": "Outlet Spacing Calculator", "description": "The minimum number of wall outlets one continuous wall space needs under the NEC 12-foot (3.7 m) rule. For a room, add up each wall space's count.", "url": "https://craftquantities.com/calculators/electrical/outlet-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/outlet-spacing-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "outlets-per-circuit-calculator", "category": "electrical", "title": "Outlets Per Circuit Calculator", "description": "Get a planning estimate of how many general-use receptacles a circuit can support, per NEC load rules.", "url": "https://craftquantities.com/calculators/electrical/outlets-per-circuit-calculator/", "json": "https://craftquantities.com/api/v1/calculators/outlets-per-circuit-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "paint-boxing-calculator", "category": "renovation-construction", "title": "Paint Boxing Calculator — Blending Tins Before You Start", "description": "How many containers it takes to blend your tins into one consistent colour, and where the changeover has to fall when they will not all fit in one.", "url": "https://craftquantities.com/calculators/renovation-construction/paint-boxing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/paint-boxing-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-15" }, { "slug": "paint-calculator", "category": "renovation-construction", "title": "Paint Calculator", "description": "Estimate how much paint you need for a room based on its dimensions, doors, windows, and number of coats.", "url": "https://craftquantities.com/calculators/renovation-construction/paint-calculator/", "json": "https://craftquantities.com/api/v1/calculators/paint-calculator.json", "inputCount": 9, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-17" }, { "slug": "paint-coverage-over-dark-calculator", "category": "renovation-construction", "title": "Paint Coverage Over Dark Colours Calculator", "description": "How many coats it takes to paint light over dark, how much paint that comes to, and how many finish coats a white or tinted primer saves.", "url": "https://craftquantities.com/calculators/renovation-construction/paint-coverage-over-dark-calculator/", "json": "https://craftquantities.com/api/v1/calculators/paint-coverage-over-dark-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-15" }, { "slug": "paint-lightening-darkening-calculator", "category": "renovation-construction", "title": "Paint Lightening and Darkening Calculator", "description": "How much white or tinting black to add for a stated proportion, what the batch becomes, and why lightening and darkening differ so much in scale.", "url": "https://craftquantities.com/calculators/renovation-construction/paint-lightening-darkening-calculator/", "json": "https://craftquantities.com/api/v1/calculators/paint-lightening-darkening-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-15" }, { "slug": "paint-mix-ratio-calculator", "category": "renovation-construction", "title": "Paint Mix Ratio Calculator — Two Paints, Recordable Parts", "description": "The volumes of two paints for a chosen ratio, the reduced parts to write on the lid, and a sample batch at that ratio, so the mix can be made again.", "url": "https://craftquantities.com/calculators/renovation-construction/paint-mix-ratio-calculator/", "json": "https://craftquantities.com/api/v1/calculators/paint-mix-ratio-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-15" }, { "slug": "paint-primer-calculator", "category": "renovation-construction", "title": "Paint Primer Calculator", "description": "Estimate how many gallons or litres of primer you need before painting, using primer's lower coverage rate.", "url": "https://craftquantities.com/calculators/renovation-construction/paint-primer-calculator/", "json": "https://craftquantities.com/api/v1/calculators/paint-primer-calculator.json", "inputCount": 2, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-17" }, { "slug": "paint-tint-ratio-calculator", "category": "renovation-construction", "title": "Paint Tint Ratio and Colourant Load Calculator", "description": "The colourant a batch needs for a stated tint load, scaled from any formula to any batch size, and whether the base you are using can actually carry it.", "url": "https://craftquantities.com/calculators/renovation-construction/paint-tint-ratio-calculator/", "json": "https://craftquantities.com/api/v1/calculators/paint-tint-ratio-calculator.json", "inputCount": 3, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-15" }, { "slug": "pallet-storage-capacity-calculator", "category": "materials-quantities", "title": "Timber Pallet Stack Storage Capacity Calculator", "description": "Calculate how many stacked pallets fit within a storage area's footprint and height limit.", "url": "https://craftquantities.com/calculators/materials-quantities/pallet-storage-capacity-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pallet-storage-capacity-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "panel-phase-balance-calculator", "category": "materials-quantities", "title": "Three-Phase Electrical Panel Load Balancing Calculator", "description": "Check the load imbalance percentage across a three-phase panel's phases A, B, and C.", "url": "https://craftquantities.com/calculators/materials-quantities/panel-phase-balance-calculator/", "json": "https://craftquantities.com/api/v1/calculators/panel-phase-balance-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "panel-slot-calculator", "category": "materials-quantities", "title": "Electrical Panel Circuit Directory Slot Calculator", "description": "Calculate how many breaker slots are used and how many remain available in an electrical panel.", "url": "https://craftquantities.com/calculators/materials-quantities/panel-slot-calculator/", "json": "https://craftquantities.com/api/v1/calculators/panel-slot-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "parapet-height-thickness-ratio-calculator", "category": "materials-quantities", "title": "Masonry Parapet Height-to-Thickness Ratio Calculator", "description": "Check an unreinforced masonry parapet's height-to-thickness ratio against a commonly-cited seismic safety limit.", "url": "https://craftquantities.com/calculators/materials-quantities/parapet-height-thickness-ratio-calculator/", "json": "https://craftquantities.com/api/v1/calculators/parapet-height-thickness-ratio-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "parking-lot-size-calculator", "category": "auto-utility", "title": "Parking Lot Size Calculator", "description": "Estimate how many standard parking stalls fit in a lot, using a double-loaded aisle layout.", "url": "https://craftquantities.com/calculators/auto-utility/parking-lot-size-calculator/", "json": "https://craftquantities.com/api/v1/calculators/parking-lot-size-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "parking-stall-layout-calculator", "category": "materials-quantities", "title": "Parking Lot Stall Layout Calculator", "description": "Calculate how many parking stalls fit along a single row of usable parking lot length.", "url": "https://craftquantities.com/calculators/materials-quantities/parking-stall-layout-calculator/", "json": "https://craftquantities.com/api/v1/calculators/parking-stall-layout-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "parquet-block-calculator", "category": "materials-quantities", "title": "Parquet Wood Flooring Block Calculator", "description": "Calculate how many parquet wood flooring blocks are needed for a floor, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/parquet-block-calculator/", "json": "https://craftquantities.com/api/v1/calculators/parquet-block-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "patio-level-dig-depth-calculator", "category": "landscaping-outdoor", "title": "Patio Levels and Dig Depth Calculator", "description": "Work a patio down from the damp-proof course: the fall, the depth to dig at each end for paving, laying course and sub-base, and the spoil to remove.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/patio-level-dig-depth-calculator/", "json": "https://craftquantities.com/api/v1/calculators/patio-level-dig-depth-calculator.json", "inputCount": 9, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-09-21" }, { "slug": "pavement-dowel-bar-calculator", "category": "materials-quantities", "title": "Concrete Pavement Dowel Bar Calculator", "description": "Size and count load-transfer dowel bars for a concrete pavement joint, using standard ACPA sizing guidance.", "url": "https://craftquantities.com/calculators/materials-quantities/pavement-dowel-bar-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pavement-dowel-bar-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "paver-base-calculator", "category": "materials-quantities", "title": "Paver Base & Sand Calculator", "description": "Estimate the gravel base and bedding sand volume needed under a paver patio or walkway.", "url": "https://craftquantities.com/calculators/materials-quantities/paver-base-calculator/", "json": "https://craftquantities.com/api/v1/calculators/paver-base-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "paver-calculator", "category": "materials-quantities", "title": "Paver Calculator", "description": "Estimate how many pavers you need for a patio or walkway, based on paver size and area.", "url": "https://craftquantities.com/calculators/materials-quantities/paver-calculator/", "json": "https://craftquantities.com/api/v1/calculators/paver-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-25" }, { "slug": "paver-edging-calculator", "category": "materials-quantities", "title": "Paver Edging Calculator", "description": "Estimate how many sections of paver edging (restraint) you need around a patio or walkway's perimeter.", "url": "https://craftquantities.com/calculators/materials-quantities/paver-edging-calculator/", "json": "https://craftquantities.com/api/v1/calculators/paver-edging-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-17" }, { "slug": "paver-pedestal-height-calculator", "category": "materials-quantities", "title": "Rooftop Terrace Paver Pedestal Height Calculator", "description": "Calculate the required pedestal height for a raised paver system to achieve a target finish elevation.", "url": "https://craftquantities.com/calculators/materials-quantities/paver-pedestal-height-calculator/", "json": "https://craftquantities.com/api/v1/calculators/paver-pedestal-height-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "paver-polymeric-sand-calculator", "category": "materials-quantities", "title": "Paver Polymeric Sand Calculator", "description": "Estimate how many bags of polymeric sand you need to fill the joints in a paver patio or walkway.", "url": "https://craftquantities.com/calculators/materials-quantities/paver-polymeric-sand-calculator/", "json": "https://craftquantities.com/api/v1/calculators/paver-polymeric-sand-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "paver-sealer-calculator", "category": "auto-utility", "title": "Paver Sealer Calculator", "description": "Estimate how many gallons or litres of paver sealer you need for a patio, walkway, or driveway.", "url": "https://craftquantities.com/calculators/auto-utility/paver-sealer-calculator/", "json": "https://craftquantities.com/api/v1/calculators/paver-sealer-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "pcf-to-kilograms-per-cubic-meter-calculator", "category": "measurements-conversions", "title": "pcf to kg/m³ Calculator", "description": "Convert pounds per cubic foot to kilograms per cubic metre — for compaction reports, fill densities and imperial mix data going metric.", "url": "https://craftquantities.com/calculators/measurements-conversions/pcf-to-kilograms-per-cubic-meter-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pcf-to-kilograms-per-cubic-meter-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "pea-gravel-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Pea Gravel Cubic Yards to Tons Calculator", "description": "Convert a pea gravel volume in cubic yards into short tons for weight-based pricing and haulage.", "url": "https://craftquantities.com/calculators/materials-quantities/pea-gravel-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pea-gravel-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "pea-gravel-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Pea Gravel Tons to Cubic Yards Calculator", "description": "Convert a pea gravel tonnage into cubic yards to check coverage and storage space.", "url": "https://craftquantities.com/calculators/materials-quantities/pea-gravel-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pea-gravel-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "pergola-post-spacing-calculator", "category": "renovation-construction", "title": "Pergola Post Spacing Calculator", "description": "Estimate how many support posts you need for a rectangular pergola based on maximum beam span.", "url": "https://craftquantities.com/calculators/renovation-construction/pergola-post-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pergola-post-spacing-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "pergola-rafter-spacing-calculator", "category": "materials-quantities", "title": "Pergola/Trellis Rafter Spacing Calculator", "description": "Calculate the number of rafters needed to span a pergola or trellis structure at a given on-center spacing.", "url": "https://craftquantities.com/calculators/materials-quantities/pergola-rafter-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pergola-rafter-spacing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "perimeter-joint-width-calculator", "category": "materials-quantities", "title": "Curtain Wall Perimeter Joint Width Calculator", "description": "Size the sealant joint between a curtain wall and the structure for thermal movement, interstory drift and the tolerance the frame was erected to.", "url": "https://craftquantities.com/calculators/materials-quantities/perimeter-joint-width-calculator/", "json": "https://craftquantities.com/api/v1/calculators/perimeter-joint-width-calculator.json", "inputCount": 3, "testCaseCount": 3, "sourceCount": 4, "lastVerified": "2026-08-30" }, { "slug": "permeable-joint-fill-stone-calculator", "category": "materials-quantities", "title": "Permeable Pavement Joint Fill Stone Calculator", "description": "Jointing stone for a permeable pavement: the first fill, the top-up the joints take during compaction, and what each later replenishment round needs.", "url": "https://craftquantities.com/calculators/materials-quantities/permeable-joint-fill-stone-calculator/", "json": "https://craftquantities.com/api/v1/calculators/permeable-joint-fill-stone-calculator.json", "inputCount": 6, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-08-30" }, { "slug": "picp-infiltration-storage-calculator", "category": "sustainability-compliance", "title": "PICP Permeable Pavement Infiltration Storage Calculator", "description": "Calculate the stormwater storage volume provided by a permeable pavement's aggregate reservoir layer.", "url": "https://craftquantities.com/calculators/sustainability-compliance/picp-infiltration-storage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/picp-infiltration-storage-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "pier-adfreeze-uplift-calculator", "category": "materials-quantities", "title": "Pier Adfreeze Uplift Calculator", "description": "Check a frost-zone pier: adfreeze bond dragging the shaft up, against the dead load, self-weight and bell holding it down.", "url": "https://craftquantities.com/calculators/materials-quantities/pier-adfreeze-uplift-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pier-adfreeze-uplift-calculator.json", "inputCount": 8, "testCaseCount": 3, "sourceCount": 5, "lastVerified": "2026-08-30" }, { "slug": "pile-group-block-failure-calculator", "category": "heavy-civil", "title": "Pile Group Block Failure Calculator (Clay)", "description": "Block-failure capacity of a pile group in clay, set beside the single piles' sum reduced by Converse-Labarre efficiency, and the smaller of the two.", "url": "https://craftquantities.com/calculators/heavy-civil/pile-group-block-failure-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pile-group-block-failure-calculator.json", "inputCount": 8, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-22" }, { "slug": "pile-group-efficiency-calculator", "category": "heavy-civil", "title": "Pile Group Efficiency Calculator (Converse-Labarre)", "description": "Estimate the reduction in per-pile capacity when piles are installed close together in a group, using the Converse-Labarre formula.", "url": "https://craftquantities.com/calculators/heavy-civil/pile-group-efficiency-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pile-group-efficiency-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "pipe-expansion-loop-calculator", "category": "materials-quantities", "title": "Pipe Thermal Expansion Loop Sizing Calculator", "description": "Calculate the required leg length of a pipe expansion loop to absorb thermal movement, sized from your pipe material's own stiffness and allowable stress.", "url": "https://craftquantities.com/calculators/materials-quantities/pipe-expansion-loop-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pipe-expansion-loop-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "pipe-fitting-equivalent-length-calculator", "category": "materials-quantities", "title": "Pipe Fitting Equivalent Length Calculator", "description": "Calculate the total equivalent straight-pipe length contributed by elbows and tees in a piping run.", "url": "https://craftquantities.com/calculators/materials-quantities/pipe-fitting-equivalent-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pipe-fitting-equivalent-length-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "pipe-hanger-spacing-calculator", "category": "materials-quantities", "title": "Pipe Hanger Spacing Calculator", "description": "Calculate the number of hangers needed to support a pipe run at code-required spacing.", "url": "https://craftquantities.com/calculators/materials-quantities/pipe-hanger-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pipe-hanger-spacing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "pipe-insulation-calculator", "category": "insulation-efficiency", "title": "Pipe Insulation Calculator", "description": "Estimate how many foam pipe insulation sleeves you need to cover a run of piping.", "url": "https://craftquantities.com/calculators/insulation-efficiency/pipe-insulation-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pipe-insulation-calculator.json", "inputCount": 2, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-17" }, { "slug": "pipe-volume-calculator", "category": "plumbing-hvac", "title": "Pipe Volume Calculator", "description": "Calculate the water volume held inside a length of pipe, based on its inside diameter.", "url": "https://craftquantities.com/calculators/plumbing-hvac/pipe-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pipe-volume-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "plant-spacing-calculator", "category": "landscaping-outdoor", "title": "Plant Spacing Calculator (Plants per Bed or Row, Square or Triangular)", "description": "How many plants a bed or hedge row takes at a given spacing, in a square or a triangular (staggered) pattern, and why staggered takes 15.5% more.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/plant-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/plant-spacing-calculator.json", "inputCount": 6, "testCaseCount": 5, "sourceCount": 3, "lastVerified": "2026-10-05" }, { "slug": "plaster-bead-calculator", "category": "materials-quantities", "title": "Plaster Angle and Stop Bead Calculator", "description": "Angle and stop beads counted in whole stock lengths, because a bead cannot be joined mid-run — with the offcut shown rather than hidden in a percentage.", "url": "https://craftquantities.com/calculators/materials-quantities/plaster-bead-calculator/", "json": "https://craftquantities.com/api/v1/calculators/plaster-bead-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-23" }, { "slug": "plaster-brown-coat-calculator", "category": "materials-quantities", "title": "Gypsum Plaster Brown Coat Volume Calculator", "description": "Calculate the plaster volume needed for a brown (leveling) coat, the second layer of a three-coat plaster system.", "url": "https://craftquantities.com/calculators/materials-quantities/plaster-brown-coat-calculator/", "json": "https://craftquantities.com/api/v1/calculators/plaster-brown-coat-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "plaster-finish-coat-calculator", "category": "materials-quantities", "title": "Gypsum Plaster Finish Coat Volume Calculator", "description": "Calculate the plaster volume needed for the thin finish coat, the final layer of a three-coat plaster system.", "url": "https://craftquantities.com/calculators/materials-quantities/plaster-finish-coat-calculator/", "json": "https://craftquantities.com/api/v1/calculators/plaster-finish-coat-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "plaster-scratch-coat-calculator", "category": "materials-quantities", "title": "Gypsum Plaster Scratch Coat Volume Calculator", "description": "Calculate the plaster volume needed for a scratch (base) coat over lath.", "url": "https://craftquantities.com/calculators/materials-quantities/plaster-scratch-coat-calculator/", "json": "https://craftquantities.com/api/v1/calculators/plaster-scratch-coat-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "plate-block-shear-net-section-calculator", "category": "materials-quantities", "title": "Steel Plate Block Shear and Net Section Calculator", "description": "Run every failure line through a bolted connection plate (net section rupture, block shear, Whitmore section, gross yielding) and see which governs.", "url": "https://craftquantities.com/calculators/materials-quantities/plate-block-shear-net-section-calculator/", "json": "https://craftquantities.com/api/v1/calculators/plate-block-shear-net-section-calculator.json", "inputCount": 11, "testCaseCount": 4, "sourceCount": 5, "lastVerified": "2026-09-06" }, { "slug": "plywood-sheet-calculator", "category": "materials-quantities", "title": "Plywood and OSB Sheet Calculator (Subfloor, Wall and Roof)", "description": "Estimate how many 4x8 ft (2440x1220 mm) plywood or OSB sheets you need for a subfloor, wall sheathing, or roof deck.", "url": "https://craftquantities.com/calculators/materials-quantities/plywood-sheet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/plywood-sheet-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "point-detector-coverage-calculator", "category": "electrical", "title": "Fire Detector Spacing and Count Calculator (BS 5839-1 and NFPA 72)", "description": "How many point smoke or heat detectors a flat ceiling needs so no point is farther from one than BS 5839-1 or NFPA 72 allows, with their spacing.", "url": "https://craftquantities.com/calculators/electrical/point-detector-coverage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/point-detector-coverage-calculator.json", "inputCount": 4, "testCaseCount": 5, "sourceCount": 3, "lastVerified": "2026-09-22" }, { "slug": "pond-volume-and-liner-calculator", "category": "landscaping-outdoor", "title": "Pond Volume and Liner Size Calculator", "description": "How much water a rectangular, round or irregular garden pond holds, in litres or gallons, and the liner sheet it needs by the liner makers' rule.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/pond-volume-and-liner-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pond-volume-and-liner-calculator.json", "inputCount": 12, "testCaseCount": 5, "sourceCount": 4, "lastVerified": "2026-10-05" }, { "slug": "pool-alkalinity-adjustment-calculator", "category": "pools-water", "title": "Pool Total Alkalinity Adjustment Calculator", "description": "How much bicarbonate or acid moves total alkalinity to where you want it — and why lowering it drags the pH down with it.", "url": "https://craftquantities.com/calculators/pools-water/pool-alkalinity-adjustment-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pool-alkalinity-adjustment-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 4, "lastVerified": "2026-09-23" }, { "slug": "pool-backwash-water-calculator", "category": "pools-water", "title": "Pool Filter Backwash Water Calculator", "description": "How much water a sand filter backwash sends to waste, the rate it washes the bed at, and the salt and stabiliser each backwash throws away.", "url": "https://craftquantities.com/calculators/pools-water/pool-backwash-water-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pool-backwash-water-calculator.json", "inputCount": 8, "testCaseCount": 2, "sourceCount": 4, "lastVerified": "2026-09-25" }, { "slug": "pool-calcium-hardness-calculator", "category": "pools-water", "title": "Pool Calcium Hardness Increaser Calculator", "description": "How much calcium chloride raises a pool's calcium hardness to your target, at the strength on the label — and why lowering it is a drain, not a dose.", "url": "https://craftquantities.com/calculators/pools-water/pool-calcium-hardness-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pool-calcium-hardness-calculator.json", "inputCount": 4, "testCaseCount": 5, "sourceCount": 4, "lastVerified": "2026-09-25" }, { "slug": "pool-chlorine-calculator", "category": "pools-water", "title": "Pool Chlorine Dose Calculator", "description": "Work out the chlorine needed to raise free chlorine to a target, for the product you actually have.", "url": "https://craftquantities.com/calculators/pools-water/pool-chlorine-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pool-chlorine-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "pool-drain-refill-calculator", "category": "pools-water", "title": "Pool Partial Drain and Refill Calculator", "description": "How much water to drain and refill to bring stabiliser, salt or calcium down to target, counting your fill water's level, and how far the water line drops.", "url": "https://craftquantities.com/calculators/pools-water/pool-drain-refill-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pool-drain-refill-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-09-25" }, { "slug": "pool-heater-sizing-calculator", "category": "pools-water", "title": "Pool Heater Sizing Calculator", "description": "Estimate the heater output needed to raise a pool to temperature in a target time, and what a cover saves.", "url": "https://craftquantities.com/calculators/pools-water/pool-heater-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pool-heater-sizing-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "pool-ph-adjustment-calculator", "category": "pools-water", "title": "Pool pH Adjustment Calculator (Acid or Soda Ash)", "description": "How much muriatic acid, dry acid or soda ash moves a pool's pH to target, from alkalinity, stabiliser, temperature and TDS, and the alkalinity it leaves.", "url": "https://craftquantities.com/calculators/pools-water/pool-ph-adjustment-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pool-ph-adjustment-calculator.json", "inputCount": 8, "testCaseCount": 5, "sourceCount": 4, "lastVerified": "2026-09-25" }, { "slug": "pool-pump-turnover-calculator", "category": "pools-water", "title": "Pool Pump Turnover Calculator", "description": "Find the flow rate and daily run time needed to turn the pool over properly.", "url": "https://craftquantities.com/calculators/pools-water/pool-pump-turnover-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pool-pump-turnover-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-06" }, { "slug": "pool-salt-calculator", "category": "pools-water", "title": "Pool Salt Calculator (Salt Chlorine Generator)", "description": "How much salt takes a salt-chlorinated pool from its reading to the cell maker's level, by weight and in bags, and how much to drain to come back down.", "url": "https://craftquantities.com/calculators/pools-water/pool-salt-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pool-salt-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-09-25" }, { "slug": "pool-shell-volume-calculator", "category": "pools-water", "title": "In-Ground Concrete Pool Shell Volume Calculator", "description": "Estimate the concrete (gunite/shotcrete) volume needed for a rectangular in-ground pool shell, distinct from the pool's water-fill volume.", "url": "https://craftquantities.com/calculators/pools-water/pool-shell-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pool-shell-volume-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "pool-solar-cover-calculator", "category": "pools-water", "title": "Pool Cover & Liner Area Calculator", "description": "Work out the cover or liner area for a pool, including the wall wrap a liner needs and the trim a cover does not.", "url": "https://craftquantities.com/calculators/pools-water/pool-solar-cover-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pool-solar-cover-calculator.json", "inputCount": 5, "testCaseCount": 5, "sourceCount": 2, "lastVerified": "2026-09-17" }, { "slug": "pool-stabilizer-calculator", "category": "pools-water", "title": "Pool Stabilizer (Cyanuric Acid) Calculator", "description": "How much stabiliser takes cyanuric acid to your target, the free chlorine that level needs, and how much of the pool to drain when it is already too high.", "url": "https://craftquantities.com/calculators/pools-water/pool-stabilizer-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pool-stabilizer-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 4, "lastVerified": "2026-09-25" }, { "slug": "pool-volume-calculator", "category": "pools-water", "title": "Pool Volume Calculator (Rectangular, Round, Oval or Kidney)", "description": "The water a rectangular, round, oval or kidney-shaped pool holds over a flat or sloping floor, in litres or US gallons, for dosing and filling it.", "url": "https://craftquantities.com/calculators/pools-water/pool-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pool-volume-calculator.json", "inputCount": 15, "testCaseCount": 7, "sourceCount": 4, "lastVerified": "2026-10-05" }, { "slug": "post-bearing-area-calculator", "category": "materials-quantities", "title": "Timber Post Bearing Area Calculator", "description": "Calculate the minimum bearing area required where a timber post bears on a beam, based on allowable perpendicular-to-grain stress.", "url": "https://craftquantities.com/calculators/materials-quantities/post-bearing-area-calculator/", "json": "https://craftquantities.com/api/v1/calculators/post-bearing-area-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "post-hole-concrete-calculator", "category": "materials-quantities", "title": "Post Hole Concrete Calculator", "description": "Work out the concrete for a set of post holes, allowing for the volume the post itself displaces.", "url": "https://craftquantities.com/calculators/materials-quantities/post-hole-concrete-calculator/", "json": "https://craftquantities.com/api/v1/calculators/post-hole-concrete-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-06" }, { "slug": "post-installed-anchor-drill-depth-calculator", "category": "materials-quantities", "title": "Post-Installed Concrete Anchor Drill Depth Calculator", "description": "Turn a required effective embedment into the depth to drill, and check the anchor you have reaches it once the fixture and the nut are allowed for.", "url": "https://craftquantities.com/calculators/materials-quantities/post-installed-anchor-drill-depth-calculator/", "json": "https://craftquantities.com/api/v1/calculators/post-installed-anchor-drill-depth-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-08-30" }, { "slug": "post-tensioned-anchor-loss-calculator", "category": "materials-quantities", "title": "Post-Tensioned Anchor Seating Loss Calculator", "description": "Estimate the prestress force lost to anchor seating (wedge draw-in) in a short post-tensioned tendon.", "url": "https://craftquantities.com/calculators/materials-quantities/post-tensioned-anchor-loss-calculator/", "json": "https://craftquantities.com/api/v1/calculators/post-tensioned-anchor-loss-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-06" }, { "slug": "pounds-force-to-kn-calculator", "category": "measurements-conversions", "title": "Pounds-Force to kN Calculator", "description": "Convert a pounds-force rating from a US anchor or fastener table into kilonewtons for a metric design check.", "url": "https://craftquantities.com/calculators/measurements-conversions/pounds-force-to-kn-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pounds-force-to-kn-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "pounds-per-foot-to-kilograms-per-meter-calculator", "category": "measurements-conversions", "title": "Pounds per Foot to Kilograms per Metre Calculator", "description": "Convert an American section weight in pounds per foot into kilograms per metre for metric weight schedules and lift plans.", "url": "https://craftquantities.com/calculators/measurements-conversions/pounds-per-foot-to-kilograms-per-meter-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pounds-per-foot-to-kilograms-per-meter-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "pounds-per-square-foot-to-kilograms-per-square-meter-calculator", "category": "measurements-conversions", "title": "lb/ft² to kg/m² Calculator", "description": "Convert lb/ft² to kg/m² for roof build-ups, façade allowances and self-weights heading for a metric supplier or code.", "url": "https://craftquantities.com/calculators/measurements-conversions/pounds-per-square-foot-to-kilograms-per-square-meter-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pounds-per-square-foot-to-kilograms-per-square-meter-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "pounds-to-kilograms-calculator", "category": "measurements-conversions", "title": "Pounds to Kilograms Calculator", "description": "Convert pounds to kilograms for metric load ratings, payloads and material weights.", "url": "https://craftquantities.com/calculators/measurements-conversions/pounds-to-kilograms-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pounds-to-kilograms-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "pounds-to-stone-calculator", "category": "measurements-conversions", "title": "Pounds to Stone Calculator", "description": "Convert pounds into stone, with the whole-stone-and-pounds form the UK actually writes.", "url": "https://craftquantities.com/calculators/measurements-conversions/pounds-to-stone-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pounds-to-stone-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-11" }, { "slug": "preliminaries-cost-calculator", "category": "financial-adjacent", "title": "Construction Preliminaries (General Conditions) Calculator", "description": "Add up preliminaries (general conditions) from your own weekly and one-off figures: fixed, time-related and value-related, and what a week of delay adds.", "url": "https://craftquantities.com/calculators/financial-adjacent/preliminaries-cost-calculator/", "json": "https://craftquantities.com/api/v1/calculators/preliminaries-cost-calculator.json", "inputCount": 10, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-02" }, { "slug": "pressure-conversion-calculator", "category": "measurements-conversions", "title": "Pressure Conversion Calculator (PSI ↔ kPa)", "description": "Convert pressure readings between PSI and kilopascals for pumps, compressors, and water systems.", "url": "https://craftquantities.com/calculators/measurements-conversions/pressure-conversion-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pressure-conversion-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "proctor-compaction-percentage-calculator", "category": "heavy-civil", "title": "Standard/Modified Proctor Compaction Percentage Calculator", "description": "Check a compacted fill's field density against its laboratory maximum Proctor density.", "url": "https://craftquantities.com/calculators/heavy-civil/proctor-compaction-percentage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/proctor-compaction-percentage-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "project-contingency-calculator", "category": "financial-adjacent", "title": "Project Contingency Calculator", "description": "Add a contingency buffer to your base project budget to cover unexpected costs and overruns.", "url": "https://craftquantities.com/calculators/financial-adjacent/project-contingency-calculator/", "json": "https://craftquantities.com/api/v1/calculators/project-contingency-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "propane-tank-sizing-calculator", "category": "plumbing-hvac", "title": "Propane Tank Sizing Calculator", "description": "Get a recommended propane tank size based on your home's total connected appliance load.", "url": "https://craftquantities.com/calculators/plumbing-hvac/propane-tank-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/propane-tank-sizing-calculator.json", "inputCount": 1, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "property-tax-increase-calculator", "category": "financial-adjacent", "title": "Property Tax Increase Calculator", "description": "Estimate the annual property tax increase from a home improvement's added resale value.", "url": "https://craftquantities.com/calculators/financial-adjacent/property-tax-increase-calculator/", "json": "https://craftquantities.com/api/v1/calculators/property-tax-increase-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "prv-sizing-calculator", "category": "materials-quantities", "title": "Pressure Reducing Valve (PRV) Sizing Calculator", "description": "Calculate the flow coefficient (Cv) needed to select a pressure reducing valve for a given flow rate and pressure drop.", "url": "https://craftquantities.com/calculators/materials-quantities/prv-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/prv-sizing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "psf-to-kpa-calculator", "category": "measurements-conversions", "title": "psf to kPa Floor Load Calculator", "description": "Convert floor loads and bearing pressures from pounds per square foot to kilopascals for metric structural models.", "url": "https://craftquantities.com/calculators/measurements-conversions/psf-to-kpa-calculator/", "json": "https://craftquantities.com/api/v1/calculators/psf-to-kpa-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "psi-to-bar-calculator", "category": "plumbing-hvac", "title": "PSI to Bar Calculator", "description": "Convert pressure from PSI to bar for European fittings, valves and pressure ratings.", "url": "https://craftquantities.com/calculators/plumbing-hvac/psi-to-bar-calculator/", "json": "https://craftquantities.com/api/v1/calculators/psi-to-bar-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "psi-to-feet-of-head-calculator", "category": "measurements-conversions", "title": "PSI to Feet of Head Calculator", "description": "Convert water pressure in PSI to feet of head, useful for well pump and elevation calculations.", "url": "https://craftquantities.com/calculators/measurements-conversions/psi-to-feet-of-head-calculator/", "json": "https://craftquantities.com/api/v1/calculators/psi-to-feet-of-head-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "pump-drawdown-time-calculator", "category": "pools-water", "title": "Pump Drain Time Calculator", "description": "Hours to drain a pool, flooded basement or tank — from the pump's real operating point on its hose, not the zero-head number on the box.", "url": "https://craftquantities.com/calculators/pools-water/pump-drawdown-time-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pump-drawdown-time-calculator.json", "inputCount": 6, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "pump-power-calculator", "category": "plumbing-hvac", "title": "Pump Power Calculator (Horsepower and kW)", "description": "Water, brake and motor-input power, in horsepower and kilowatts, for a pump lifting a flow through a head, from specific gravity and the two efficiencies.", "url": "https://craftquantities.com/calculators/plumbing-hvac/pump-power-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pump-power-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-10-05" }, { "slug": "purlin-spacing-calculator", "category": "materials-quantities", "title": "Purlin Row Spacing Calculator", "description": "Calculate the number of purlin rows needed along a rafter run given a maximum allowable purlin spacing.", "url": "https://craftquantities.com/calculators/materials-quantities/purlin-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/purlin-spacing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "pv-string-sizing-calculator", "category": "solar-energy", "title": "Solar PV String Sizing Calculator", "description": "Calculate the maximum number of solar panels that can be wired in series in one string without exceeding inverter/system voltage limits.", "url": "https://craftquantities.com/calculators/solar-energy/pv-string-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/pv-string-sizing-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "quarry-tile-grout-volume-calculator", "category": "materials-quantities", "title": "Quarry Tile Acid-Resistant Grout Joint Volume Calculator", "description": "Calculate the chemical-resistant grout volume needed for a quarry tile installation's wider joints.", "url": "https://craftquantities.com/calculators/materials-quantities/quarry-tile-grout-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/quarry-tile-grout-volume-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "r-value-calculator", "category": "insulation-efficiency", "title": "R-Value Calculator", "description": "Add up the R-values of layered materials in a wall, floor, or ceiling assembly to get the total insulating value.", "url": "https://craftquantities.com/calculators/insulation-efficiency/r-value-calculator/", "json": "https://craftquantities.com/api/v1/calculators/r-value-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "r-value-to-rsi-calculator", "category": "insulation-efficiency", "title": "R-Value to RSI Calculator", "description": "Convert an IP R-value into metric RSI, so a US insulation rating can be read against a Canadian or European specification.", "url": "https://craftquantities.com/calculators/insulation-efficiency/r-value-to-rsi-calculator/", "json": "https://craftquantities.com/api/v1/calculators/r-value-to-rsi-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-12" }, { "slug": "r-value-to-u-value-calculator", "category": "insulation-efficiency", "title": "R-Value to U-Value Calculator", "description": "Convert thermal resistance (R-value) into thermal transmittance (U-value) for heat-loss calculations.", "url": "https://craftquantities.com/calculators/insulation-efficiency/r-value-to-u-value-calculator/", "json": "https://craftquantities.com/api/v1/calculators/r-value-to-u-value-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "radiant-barrier-coverage-calculator", "category": "materials-quantities", "title": "Radiant Barrier Foil Coverage Calculator", "description": "Calculate the radiant barrier foil material needed to cover an attic roof deck, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/radiant-barrier-coverage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/radiant-barrier-coverage-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "radiant-cable-spacing-calculator", "category": "materials-quantities", "title": "Radiant Floor Heating Cable Spacing Calculator", "description": "Calculate the total loose radiant heating cable length needed for a floor at a given loop spacing.", "url": "https://craftquantities.com/calculators/materials-quantities/radiant-cable-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/radiant-cable-spacing-calculator.json", "inputCount": 2, "testCaseCount": 4, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "radiant-floor-pex-calculator", "category": "plumbing-hvac", "title": "Radiant Floor PEX Tubing Calculator", "description": "Estimate the length of PEX tubing needed for a radiant floor heating loop, based on area and tube spacing.", "url": "https://craftquantities.com/calculators/plumbing-hvac/radiant-floor-pex-calculator/", "json": "https://craftquantities.com/api/v1/calculators/radiant-floor-pex-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-09-26" }, { "slug": "radiator-output-delta-t-calculator", "category": "plumbing-hvac", "title": "Radiator Output at Lower Flow Temperature (ΔT Correction) Calculator", "description": "What a radiator gives at the water temperatures a heat pump or condensing boiler runs at, and the catalogue rating to buy so it still heats the room.", "url": "https://craftquantities.com/calculators/plumbing-hvac/radiator-output-delta-t-calculator/", "json": "https://craftquantities.com/api/v1/calculators/radiator-output-delta-t-calculator.json", "inputCount": 7, "testCaseCount": 5, "sourceCount": 3, "lastVerified": "2026-09-21" }, { "slug": "radius-to-area-calculator", "category": "measurements-conversions", "title": "Radius to Area Calculator", "description": "Convert a measured radius into circular area for material take-off on curved and round work.", "url": "https://craftquantities.com/calculators/measurements-conversions/radius-to-area-calculator/", "json": "https://craftquantities.com/api/v1/calculators/radius-to-area-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "raft-slab-thickenings-volume-calculator", "category": "materials-quantities", "title": "Raft Slab Concrete Volume Calculator (Edge Thickenings and Downstands)", "description": "The concrete in a raft or ground-bearing slab and the thickenings the plan does not show: edge bands, internal downstands and pads, plus waste.", "url": "https://craftquantities.com/calculators/materials-quantities/raft-slab-thickenings-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/raft-slab-thickenings-volume-calculator.json", "inputCount": 14, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-22" }, { "slug": "rain-barrel-collection-calculator", "category": "plumbing-hvac", "title": "Rain Barrel and Rainwater Collection Calculator", "description": "Estimate how many gallons or litres of rainwater you can collect from your roof during a rainfall event.", "url": "https://craftquantities.com/calculators/plumbing-hvac/rain-barrel-collection-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rain-barrel-collection-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "rain-screen-fastener-calculator", "category": "materials-quantities", "title": "Rain-Screen Cladding Panel Fastener Calculator", "description": "Calculate the total fasteners needed for a rain-screen cladding panel installation.", "url": "https://craftquantities.com/calculators/materials-quantities/rain-screen-fastener-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rain-screen-fastener-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "rain-screen-furring-calculator", "category": "materials-quantities", "title": "Rain-Screen Cladding Furring Strip Calculator", "description": "Calculate the number and total length of vertical furring strips needed for a rain-screen cladding ventilation gap.", "url": "https://craftquantities.com/calculators/materials-quantities/rain-screen-furring-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rain-screen-furring-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "rain-screen-ventilation-area-calculator", "category": "materials-quantities", "title": "Rain-Screen Cladding Ventilation Net Free Area Calculator", "description": "Calculate the net free (open) ventilation area for a rain-screen cladding system's perimeter vent gap.", "url": "https://craftquantities.com/calculators/materials-quantities/rain-screen-ventilation-area-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rain-screen-ventilation-area-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "rainwater-tank-size-calculator", "category": "plumbing-hvac", "title": "Rainwater Tank and Cistern Size Calculator", "description": "A year's rainwater from a roof's plan area, annual rainfall and runoff share, set against household use, and the tank (cistern) for your days of storage.", "url": "https://craftquantities.com/calculators/plumbing-hvac/rainwater-tank-size-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rainwater-tank-size-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 6, "lastVerified": "2026-10-05" }, { "slug": "raised-garden-bed-soil-calculator", "category": "materials-quantities", "title": "Raised Garden Bed Soil Calculator", "description": "Estimate how many bags of soil you need to fill a raised garden bed.", "url": "https://craftquantities.com/calculators/materials-quantities/raised-garden-bed-soil-calculator/", "json": "https://craftquantities.com/api/v1/calculators/raised-garden-bed-soil-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "range-hood-airflow-calculator", "category": "plumbing-hvac", "title": "Range Hood and Cooker Hood Airflow Calculator (CFM, L/s and Make-Up Air)", "description": "The kitchen extract the 2021 IRC, NBC 2020 or England's rules ask of a range (cooker) hood, HVI's figure for the cooktop, and when make-up air is needed.", "url": "https://craftquantities.com/calculators/plumbing-hvac/range-hood-airflow-calculator/", "json": "https://craftquantities.com/api/v1/calculators/range-hood-airflow-calculator.json", "inputCount": 5, "testCaseCount": 6, "sourceCount": 5, "lastVerified": "2026-10-05" }, { "slug": "rankine-passive-pressure-calculator", "category": "materials-quantities", "title": "Rankine Passive Earth Pressure Calculator", "description": "Compute the passive earth pressure resultant that soil provides to resist a wall's sliding, using the Rankine model.", "url": "https://craftquantities.com/calculators/materials-quantities/rankine-passive-pressure-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rankine-passive-pressure-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "rational-method-peak-runoff-calculator", "category": "heavy-civil", "title": "Rational Method Peak Runoff Calculator", "description": "Peak discharge from a small catchment by the rational method (Q = C i A), with the on-site and offsite areas each at its own runoff coefficient.", "url": "https://craftquantities.com/calculators/heavy-civil/rational-method-peak-runoff-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rational-method-peak-runoff-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-08-30" }, { "slug": "rc-beam-moment-capacity-calculator", "category": "materials-quantities", "title": "Reinforced Concrete Beam Moment Capacity Calculator (ACI 318)", "description": "Estimate the nominal moment capacity of a singly-reinforced rectangular concrete beam.", "url": "https://craftquantities.com/calculators/materials-quantities/rc-beam-moment-capacity-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rc-beam-moment-capacity-calculator.json", "inputCount": 5, "testCaseCount": 5, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "rc-column-axial-capacity-calculator", "category": "materials-quantities", "title": "Reinforced Concrete Tied Column Axial Capacity Calculator (ACI 318)", "description": "Estimate the maximum nominal axial load capacity of a tied (non-spiral) reinforced concrete column.", "url": "https://craftquantities.com/calculators/materials-quantities/rc-column-axial-capacity-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rc-column-axial-capacity-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "rebar-calculator", "category": "materials-quantities", "title": "Rebar Calculator", "description": "Estimate the total length of rebar — linear feet or metres — and the number of sticks needed for a rectangular grid inside a concrete slab.", "url": "https://craftquantities.com/calculators/materials-quantities/rebar-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rebar-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-17" }, { "slug": "rebar-chair-count-calculator", "category": "materials-quantities", "title": "Rebar Chair and Bolster Count Calculator", "description": "Count the chairs, bolsters and side-form spacers a reinforcing mat needs so its cover survives a crew walking on it.", "url": "https://craftquantities.com/calculators/materials-quantities/rebar-chair-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rebar-chair-count-calculator.json", "inputCount": 8, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-09-02" }, { "slug": "rebar-development-length-calculator", "category": "materials-quantities", "title": "Rebar Development Length Calculator (ACI 318)", "description": "Estimate the tension development length needed for a rebar bar, using ACI 318's simplified case for adequately spaced/covered bars.", "url": "https://craftquantities.com/calculators/materials-quantities/rebar-development-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rebar-development-length-calculator.json", "inputCount": 6, "testCaseCount": 5, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "rebar-lap-splice-length-calculator", "category": "materials-quantities", "title": "Rebar Lap Splice Length Calculator (ACI 318)", "description": "Turn a development length into an ACI 318 lap: Class A or B from the steel ratio and bars spliced, the top-bar and coating factors, and the stagger.", "url": "https://craftquantities.com/calculators/materials-quantities/rebar-lap-splice-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rebar-lap-splice-length-calculator.json", "inputCount": 9, "testCaseCount": 3, "sourceCount": 4, "lastVerified": "2026-08-30" }, { "slug": "rebar-standard-hook-calculator", "category": "materials-quantities", "title": "Rebar Standard Hook Development and Cut-Length Calculator", "description": "How much embedment a standard 90 or 180 degree hook actually develops, and how much bar the bend and its tail take off the cut list.", "url": "https://craftquantities.com/calculators/materials-quantities/rebar-standard-hook-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rebar-standard-hook-calculator.json", "inputCount": 8, "testCaseCount": 2, "sourceCount": 4, "lastVerified": "2026-09-01" }, { "slug": "rebar-weight-calculator", "category": "materials-quantities", "title": "Rebar Weight Calculator", "description": "Estimate the total weight of rebar needed, for costing or delivery planning, from total length and bar size.", "url": "https://craftquantities.com/calculators/materials-quantities/rebar-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rebar-weight-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "rebate-adjusted-cost-calculator", "category": "financial-adjacent", "title": "Rebate-Adjusted Cost Calculator", "description": "Find your true net cost after applying a percentage rebate/tax credit and a flat rebate amount.", "url": "https://craftquantities.com/calculators/financial-adjacent/rebate-adjusted-cost-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rebate-adjusted-cost-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "rectangle-diagonal-squaring-calculator", "category": "measurements-conversions", "title": "Court Diagonal and Squaring Triangle Calculator", "description": "The diagonals of a sports court: what the corner-to-corner tape should read, how far apart the two may be, and the scaled 3-4-5 triangle to set it out.", "url": "https://craftquantities.com/calculators/measurements-conversions/rectangle-diagonal-squaring-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rectangle-diagonal-squaring-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 4, "lastVerified": "2026-08-30" }, { "slug": "rectangular-duct-surface-area-calculator", "category": "materials-quantities", "title": "Rectangular Sheet Metal Duct Surface Area Calculator", "description": "Calculate the sheet metal surface area needed to fabricate a straight run of rectangular duct, with a waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/rectangular-duct-surface-area-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rectangular-duct-surface-area-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "recycled-aggregate-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Recycled Aggregate Cubic Yards to Tons Calculator", "description": "Convert a recycled aggregate volume into short tons for ordering, haulage and storage planning.", "url": "https://craftquantities.com/calculators/materials-quantities/recycled-aggregate-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/recycled-aggregate-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "recycled-aggregate-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Recycled Aggregate Tons to Cubic Yards Calculator", "description": "Convert a recycled aggregate tonnage into cubic yards to check coverage, capacity and storage.", "url": "https://craftquantities.com/calculators/materials-quantities/recycled-aggregate-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/recycled-aggregate-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "refinance-break-even-calculator", "category": "financial-adjacent", "title": "Refinance Break-Even Calculator", "description": "Find how many months it takes for a remortgage to repay its own fees — the only number that decides whether it is worth doing.", "url": "https://craftquantities.com/calculators/financial-adjacent/refinance-break-even-calculator/", "json": "https://craftquantities.com/api/v1/calculators/refinance-break-even-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-06" }, { "slug": "refrigerant-line-charge-adjustment-calculator", "category": "materials-quantities", "title": "Refrigerant Line Length Charge Adjustment Calculator", "description": "How much refrigerant to weigh in beyond the factory charge when the liquid line runs past the length the unit ships charged for, at the maker's rate.", "url": "https://craftquantities.com/calculators/materials-quantities/refrigerant-line-charge-adjustment-calculator/", "json": "https://craftquantities.com/api/v1/calculators/refrigerant-line-charge-adjustment-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-08-30" }, { "slug": "refrigerant-line-equivalent-length-calculator", "category": "materials-quantities", "title": "Refrigerant Line Total Equivalent Length Calculator", "description": "Turn a refrigerant route's measured run, bends, traps, valves and drier into the equivalent length a heat pump's published maximum is set against.", "url": "https://craftquantities.com/calculators/materials-quantities/refrigerant-line-equivalent-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/refrigerant-line-equivalent-length-calculator.json", "inputCount": 7, "testCaseCount": 3, "sourceCount": 4, "lastVerified": "2026-08-30" }, { "slug": "refrigerant-line-size-calculator", "category": "materials-quantities", "title": "Refrigerant Line Set Nominal Size Reference Calculator", "description": "Look up the typical suction and liquid line copper tubing size for a residential split-system by cooling capacity.", "url": "https://craftquantities.com/calculators/materials-quantities/refrigerant-line-size-calculator/", "json": "https://craftquantities.com/api/v1/calculators/refrigerant-line-size-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "reinforced-wall-internal-sliding-calculator", "category": "heavy-civil", "title": "Reinforced SRW Internal Sliding Check", "description": "Sliding factors of safety at each geogrid level of a reinforced segmental wall and at its levelling pad, and the level where the margin is thinnest.", "url": "https://craftquantities.com/calculators/heavy-civil/reinforced-wall-internal-sliding-calculator/", "json": "https://craftquantities.com/api/v1/calculators/reinforced-wall-internal-sliding-calculator.json", "inputCount": 8, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-08-30" }, { "slug": "relief-valve-discharge-calculator", "category": "materials-quantities", "title": "Backflow Preventer Relief Valve Discharge Calculator", "description": "Calculate the discharge flow rate from a reduced-pressure backflow preventer's relief valve, for air gap/drain sizing.", "url": "https://craftquantities.com/calculators/materials-quantities/relief-valve-discharge-calculator/", "json": "https://craftquantities.com/api/v1/calculators/relief-valve-discharge-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "render-plaster-mix-calculator", "category": "materials-quantities", "title": "Render and Plaster Mix Calculator, Coat by Coat", "description": "Binder and sand for each coat of a render or plaster build-up, at the coat thicknesses the system sets, each coat weaker than the one beneath it.", "url": "https://craftquantities.com/calculators/materials-quantities/render-plaster-mix-calculator/", "json": "https://craftquantities.com/api/v1/calculators/render-plaster-mix-calculator.json", "inputCount": 3, "testCaseCount": 3, "sourceCount": 4, "lastVerified": "2026-09-15" }, { "slug": "renovation-budget-calculator", "category": "financial-adjacent", "title": "Renovation Budget Calculator", "description": "Add up materials, labor, permits, and a contingency buffer into one project budget total. Pure arithmetic — not financial advice.", "url": "https://craftquantities.com/calculators/financial-adjacent/renovation-budget-calculator/", "json": "https://craftquantities.com/api/v1/calculators/renovation-budget-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "rent-vs-buy-calculator", "category": "financial-adjacent", "title": "Rent vs Buy Calculator", "description": "Compare the true monthly cost of renting against owning, including the ownership costs people leave out.", "url": "https://craftquantities.com/calculators/financial-adjacent/rent-vs-buy-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rent-vs-buy-calculator.json", "inputCount": 7, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "reservoir-drawdown-time-calculator", "category": "sustainability-compliance", "title": "Permeable Reservoir Drawdown Time Calculator", "description": "How long an aggregate stormwater reservoir takes to drain into the subgrade at the design infiltration rate, beside the drawdown limit your manual sets.", "url": "https://craftquantities.com/calculators/sustainability-compliance/reservoir-drawdown-time-calculator/", "json": "https://craftquantities.com/api/v1/calculators/reservoir-drawdown-time-calculator.json", "inputCount": 7, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-08-30" }, { "slug": "resilient-channel-spacing-calculator", "category": "materials-quantities", "title": "Resilient Channel (RC-1) Spacing & Linear Footage Calculator", "description": "Calculate the number of rows and total linear footage of resilient channel needed for a decoupled soundproof wall or ceiling.", "url": "https://craftquantities.com/calculators/materials-quantities/resilient-channel-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/resilient-channel-spacing-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "resilient-clip-screw-calculator", "category": "materials-quantities", "title": "Resilient Clip & Furring Channel Screw Count Calculator", "description": "Calculate total screws needed to fasten resilient sound-isolation clips and furring channel.", "url": "https://craftquantities.com/calculators/materials-quantities/resilient-clip-screw-calculator/", "json": "https://craftquantities.com/api/v1/calculators/resilient-clip-screw-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "resilient-flooring-calculator", "category": "renovation-construction", "title": "LVP, Laminate & Engineered Floor Calculator", "description": "Count planks and packs for a click floor, with the waste a long plank in a small room really needs.", "url": "https://craftquantities.com/calculators/renovation-construction/resilient-flooring-calculator/", "json": "https://craftquantities.com/api/v1/calculators/resilient-flooring-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-17" }, { "slug": "resin-bound-surfacing-calculator", "category": "landscaping-outdoor", "title": "Resin Bound Surfacing Calculator", "description": "How much dried stone a resin bound drive or path takes at its laid depth, in whole resin kits, with the depth checked against the stone size.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/resin-bound-surfacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/resin-bound-surfacing-calculator.json", "inputCount": 6, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-09-21" }, { "slug": "retaining-wall-block-calculator", "category": "materials-quantities", "title": "Retaining Wall Block Calculator", "description": "Estimate how many retaining wall blocks you need, based on wall face area and block face size.", "url": "https://craftquantities.com/calculators/materials-quantities/retaining-wall-block-calculator/", "json": "https://craftquantities.com/api/v1/calculators/retaining-wall-block-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-17" }, { "slug": "retaining-wall-drainage-gravel-calculator", "category": "auto-utility", "title": "Retaining Wall Drainage Gravel Calculator", "description": "Estimate the drainage gravel needed behind a retaining wall, in cubic yards or cubic metres.", "url": "https://craftquantities.com/calculators/auto-utility/retaining-wall-drainage-gravel-calculator/", "json": "https://craftquantities.com/api/v1/calculators/retaining-wall-drainage-gravel-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-17" }, { "slug": "retaining-wall-footing-calculator", "category": "materials-quantities", "title": "Retaining Wall Footing Sizing Calculator", "description": "Get a rule-of-thumb footing width from wall height, then estimate the footing's concrete volume.", "url": "https://craftquantities.com/calculators/materials-quantities/retaining-wall-footing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/retaining-wall-footing-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "retaining-wall-stability-calculator", "category": "materials-quantities", "title": "Retaining Wall Preliminary Stability Check", "description": "Run a preliminary Rankine active earth pressure and safety-factor check on a gravity retaining wall design.", "url": "https://craftquantities.com/calculators/materials-quantities/retaining-wall-stability-calculator/", "json": "https://craftquantities.com/api/v1/calculators/retaining-wall-stability-calculator.json", "inputCount": 6, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-09-06" }, { "slug": "retaining-wall-stem-volume-calculator", "category": "materials-quantities", "title": "Poured Retaining Wall Stem Concrete Volume Calculator", "description": "Work out the concrete in the wall stem itself — the vertical face above the footing — including a battered stem that tapers toward the top.", "url": "https://craftquantities.com/calculators/materials-quantities/retaining-wall-stem-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/retaining-wall-stem-volume-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "retroreflective-bead-calculator", "category": "materials-quantities", "title": "Roadway Striping Retroreflective Drop-On Bead Calculator", "description": "Calculate the glass bead material needed for retroreflective drop-on application over roadway striping paint.", "url": "https://craftquantities.com/calculators/materials-quantities/retroreflective-bead-calculator/", "json": "https://craftquantities.com/api/v1/calculators/retroreflective-bead-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "return-grille-sizing-calculator", "category": "materials-quantities", "title": "Return Air Grille Free Area Sizing Calculator", "description": "Calculate the gross grille size needed to deliver a target airflow at a target face velocity, accounting for the grille's free-area percentage.", "url": "https://craftquantities.com/calculators/materials-quantities/return-grille-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/return-grille-sizing-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "reverberation-time-calculator", "category": "materials-quantities", "title": "Reverberation Time Calculator (Sabine RT60)", "description": "A room's reverberation time (RT60) by Sabine, from its size and each surface's absorption coefficient, and the absorption or absorber a target time needs.", "url": "https://craftquantities.com/calculators/materials-quantities/reverberation-time-calculator/", "json": "https://craftquantities.com/api/v1/calculators/reverberation-time-calculator.json", "inputCount": 14, "testCaseCount": 5, "sourceCount": 4, "lastVerified": "2026-10-05" }, { "slug": "reverse-concrete-slab-calculator", "category": "materials-quantities", "title": "Reverse Concrete Slab Solver", "description": "Already have bags of concrete mix on hand? Find the maximum slab area you can pour at a given thickness before running out.", "url": "https://craftquantities.com/calculators/materials-quantities/reverse-concrete-slab-calculator/", "json": "https://craftquantities.com/api/v1/calculators/reverse-concrete-slab-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "reverse-decking-material-calculator", "category": "renovation-construction", "title": "Reverse Decking Material Solver", "description": "Already have deck boards on hand? Find the maximum deck area you can cover before running out of material.", "url": "https://craftquantities.com/calculators/renovation-construction/reverse-decking-material-calculator/", "json": "https://craftquantities.com/api/v1/calculators/reverse-decking-material-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "reverse-drywall-coverage-calculator", "category": "renovation-construction", "title": "Reverse Drywall Coverage Solver", "description": "Already have drywall sheets on hand? Find the maximum wall area and linear footage you can cover before running out.", "url": "https://craftquantities.com/calculators/renovation-construction/reverse-drywall-coverage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/reverse-drywall-coverage-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "revolving-door-footprint-calculator", "category": "materials-quantities", "title": "Commercial Revolving Door Vestibule Footprint Calculator", "description": "Calculate the circular floor footprint area needed for a revolving door and its surrounding clearance.", "url": "https://craftquantities.com/calculators/materials-quantities/revolving-door-footprint-calculator/", "json": "https://craftquantities.com/api/v1/calculators/revolving-door-footprint-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "ridge-beam-tributary-load-calculator", "category": "materials-quantities", "title": "Ridge Beam Tributary Load Calculator", "description": "Calculate the load per linear meter carried by a structural ridge beam supporting cathedral-ceiling rafters.", "url": "https://craftquantities.com/calculators/materials-quantities/ridge-beam-tributary-load-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ridge-beam-tributary-load-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "ridge-vent-linear-footage-calculator", "category": "materials-quantities", "title": "Ridge Vent Linear Footage Calculator", "description": "Calculate the ridge vent material needed for a roof's ridge line, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/ridge-vent-linear-footage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ridge-vent-linear-footage-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "rim-board-linear-footage-calculator", "category": "materials-quantities", "title": "Rim Board Linear Footage Calculator", "description": "Calculate total rim board length needed around a floor perimeter, including waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/rim-board-linear-footage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rim-board-linear-footage-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "rim-joist-insulation-calculator", "category": "insulation-efficiency", "title": "Rim Joist Insulation Calculator", "description": "Estimate how many foam board sheets you need to insulate the rim joist band around a house's perimeter.", "url": "https://craftquantities.com/calculators/insulation-efficiency/rim-joist-insulation-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rim-joist-insulation-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "rip-rap-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Rip Rap Cubic Yards to Tons Calculator", "description": "Convert a rip rap volume into short tons for ordering, disposal and transport planning.", "url": "https://craftquantities.com/calculators/materials-quantities/rip-rap-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rip-rap-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "rip-rap-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Rip Rap Tons to Cubic Yards Calculator", "description": "Convert a rip rap tonnage into cubic yards to check storage, capacity and coverage.", "url": "https://craftquantities.com/calculators/materials-quantities/rip-rap-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rip-rap-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "riprap-slope-volume-calculator", "category": "heavy-civil", "title": "Riprap Slope Protection Volume Calculator", "description": "Calculate the stone volume needed for a riprap slope protection layer.", "url": "https://craftquantities.com/calculators/heavy-civil/riprap-slope-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/riprap-slope-volume-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "riser-spread-tolerance-checker", "category": "renovation-construction", "title": "Stair Riser Spread Tolerance Checker", "description": "Measure the flight, enter the tallest and the shortest riser, and see how much of the permitted variation the difference between them uses up.", "url": "https://craftquantities.com/calculators/renovation-construction/riser-spread-tolerance-checker/", "json": "https://craftquantities.com/api/v1/calculators/riser-spread-tolerance-checker.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-08-30" }, { "slug": "river-rock-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "River Rock Cubic Yards to Tons Calculator", "description": "Convert a river rock volume into short tons for pricing, haulage and weight limits.", "url": "https://craftquantities.com/calculators/materials-quantities/river-rock-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/river-rock-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "river-rock-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "River Rock Tons to Cubic Yards Calculator", "description": "Convert a river rock tonnage into cubic yards to check coverage, capacity and storage.", "url": "https://craftquantities.com/calculators/materials-quantities/river-rock-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/river-rock-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "road-salt-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Road Salt Cubic Yards to Tons Calculator", "description": "Convert a road salt volume into short tons for ordering, haulage and storage planning.", "url": "https://craftquantities.com/calculators/materials-quantities/road-salt-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/road-salt-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "road-salt-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Road Salt Tons to Cubic Yards Calculator", "description": "Convert a road salt tonnage into cubic yards to check coverage, capacity and storage.", "url": "https://craftquantities.com/calculators/materials-quantities/road-salt-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/road-salt-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "roadway-crown-slope-calculator", "category": "materials-quantities", "title": "Roadway Crown Cross-Slope Calculator", "description": "Calculate the elevation drop from a roadway's centerline crown to its edge, for a target drainage cross-slope.", "url": "https://craftquantities.com/calculators/materials-quantities/roadway-crown-slope-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roadway-crown-slope-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "roi-home-improvement-calculator", "category": "financial-adjacent", "title": "Home Improvement ROI Calculator", "description": "Get a rough estimate of resale value recouped for common renovation project types.", "url": "https://craftquantities.com/calculators/financial-adjacent/roi-home-improvement-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roi-home-improvement-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "roof-batten-spacing-calculator", "category": "materials-quantities", "title": "Roof Batten Spacing Calculator (Tile Roofing)", "description": "Calculate the number of horizontal batten rows needed up a tile roof slope for a given batten gauge.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-batten-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-batten-spacing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "roof-covering-fixing-calculator", "category": "renovation-construction", "title": "Roof Covering Fixing Calculator", "description": "Count the nails, clips or screws holding a roof covering down, from the covering's width and exposure and a tighter pattern at the perimeter.", "url": "https://craftquantities.com/calculators/renovation-construction/roof-covering-fixing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-covering-fixing-calculator.json", "inputCount": 7, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-27" }, { "slug": "roof-cricket-framing-calculator", "category": "materials-quantities", "title": "Roof Cricket (Saddle) Framing Calculator", "description": "Calculate the ridge height of a roof cricket built to divert water around a chimney or other roof obstruction.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-cricket-framing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-cricket-framing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "roof-curb-flashing-calculator", "category": "materials-quantities", "title": "Rooftop Unit Curb Flashing Calculator", "description": "Calculate the flashing material needed around a rooftop mechanical unit curb, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-curb-flashing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-curb-flashing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "roof-deflection-limit-calculator", "category": "materials-quantities", "title": "Roof/Floor Deflection Limit Calculator", "description": "Calculate the allowable absolute deflection for a given span and code deflection ratio limit.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-deflection-limit-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-deflection-limit-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "roof-drain-sump-pan-calculator", "category": "materials-quantities", "title": "Roof Drain Sump Pan Sizing Calculator", "description": "Calculate the sump pan area needed around a roof drain pipe, based on pipe diameter and required clearance.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-drain-sump-pan-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-drain-sump-pan-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "roof-expansion-joint-cover-calculator", "category": "materials-quantities", "title": "Roof Expansion Joint Cover Calculator", "description": "Calculate the expansion joint cover material needed for a roof, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-expansion-joint-cover-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-expansion-joint-cover-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "roof-fall-protection-anchor-calculator", "category": "materials-quantities", "title": "Roof Fall Protection Anchor Spacing Calculator", "description": "Calculate the number of fall protection anchor points needed along a rooftop walk path.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-fall-protection-anchor-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-fall-protection-anchor-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "roof-hatch-curb-flashing-calculator", "category": "materials-quantities", "title": "Roof Hatch Curb Flashing Calculator", "description": "Calculate the flashing material needed around a roof access hatch curb, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-hatch-curb-flashing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-hatch-curb-flashing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "roof-ice-dam-membrane-calculator", "category": "materials-quantities", "title": "Roof Eave Ice Dam Protection Membrane Footprint", "description": "Calculate the ice-and-water-shield membrane area required at eaves per IRC cold-climate requirements.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-ice-dam-membrane-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-ice-dam-membrane-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "roof-insulation-cover-board-calculator", "category": "materials-quantities", "title": "Roof Insulation Cover Board Calculator", "description": "Calculate the cover board sheets needed over roof insulation before the membrane is installed.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-insulation-cover-board-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-insulation-cover-board-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "roof-overhang-tail-length-calculator", "category": "materials-quantities", "title": "Roof Overhang Tail Length Calculator", "description": "Convert a desired horizontal roof overhang into the actual rafter tail length measured along the roof slope.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-overhang-tail-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-overhang-tail-length-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "roof-paver-pedestal-calculator", "category": "materials-quantities", "title": "Roof Paver Pedestal Grid Calculator", "description": "Calculate the number of adjustable pedestals needed for a pedestal-supported roof paver deck system.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-paver-pedestal-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-paver-pedestal-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "roof-perimeter-termination-bar-calculator", "category": "materials-quantities", "title": "Roof Perimeter Termination Bar Calculator", "description": "Calculate the termination bar material needed around a single-ply roof membrane's perimeter, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-perimeter-termination-bar-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-perimeter-termination-bar-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "roof-pitch-angle-calculator", "category": "measurements-conversions", "title": "Roof Pitch to Angle Calculator", "description": "Convert a roof pitch (rise per 12 units of run) into its equivalent angle in degrees and slope percent.", "url": "https://craftquantities.com/calculators/measurements-conversions/roof-pitch-angle-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-pitch-angle-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "roof-pitch-to-degrees-calculator", "category": "renovation-construction", "title": "Roof Pitch to Degrees Calculator", "description": "Convert an American rise-over-12 roof pitch into degrees for cutting, setting out and metric drawings.", "url": "https://craftquantities.com/calculators/renovation-construction/roof-pitch-to-degrees-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-pitch-to-degrees-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "roof-ridge-cap-calculator", "category": "renovation-construction", "title": "Roof Ridge Cap Calculator", "description": "Estimate how many bundles of ridge cap shingles you need for a roof's ridge and hip lines.", "url": "https://craftquantities.com/calculators/renovation-construction/roof-ridge-cap-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-ridge-cap-calculator.json", "inputCount": 2, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-17" }, { "slug": "roof-scupper-sizing-calculator", "category": "materials-quantities", "title": "Roof Scupper/Secondary Emergency Drain Sizing Calculator", "description": "Calculate the required scupper or secondary drain opening area for a roof area, using a rainfall-intensity sizing factor.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-scupper-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-scupper-sizing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "roof-sheathing-nail-count-calculator", "category": "materials-quantities", "title": "Roof Sheathing Nailing Pattern Nail Count Calculator", "description": "Calculate total nail count for roof sheathing installation from sheet count and your nailing schedule's nails-per-sheet figure.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-sheathing-nail-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-sheathing-nail-count-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "roof-snow-drift-surcharge-calculator", "category": "materials-quantities", "title": "Roof Snow Drift Surcharge Calculator", "description": "The snow drift that forms on a lower roof beside a taller one: its height, how far it reaches, and the peak surcharge it adds at the wall.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-snow-drift-surcharge-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-snow-drift-surcharge-calculator.json", "inputCount": 6, "testCaseCount": 2, "sourceCount": 4, "lastVerified": "2026-08-30" }, { "slug": "roof-snow-load-calculator", "category": "materials-quantities", "title": "Ground-to-Roof Snow Load Calculator", "description": "Convert ground snow load to flat-roof design snow load per ASCE 7.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-snow-load-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-snow-load-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "roof-squares-calculator", "category": "renovation-construction", "title": "Roof Squares Calculator", "description": "Convert a roof's plan area and pitch into roofing squares — the unit material is ordered and labour is quoted in.", "url": "https://craftquantities.com/calculators/renovation-construction/roof-squares-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-squares-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "roof-tile-calculator", "category": "materials-quantities", "title": "Roof Tile and Slate Calculator (Gauge, Battens and Ridge Tiles)", "description": "Roof tiles or slates from the maker's gauge and cover width, with battens, ridge and hip tiles, and a plain-tile or slate roof's eaves and verge tiles.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-tile-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-tile-calculator.json", "inputCount": 15, "testCaseCount": 9, "sourceCount": 9, "lastVerified": "2026-10-05" }, { "slug": "roof-truss-spacing-calculator", "category": "materials-quantities", "title": "Roof Truss Spacing & Count Calculator", "description": "Calculate total number of roof trusses needed for a given building length and truss spacing.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-truss-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-truss-spacing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "roof-uplift-zone-pressure-calculator", "category": "materials-quantities", "title": "Roof Uplift Zone Pressure and Zone Width Calculator", "description": "Velocity pressure at roof height, the net uplift for the coefficient your code figure gives, and how far in from each edge the corner and edge zones reach.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-uplift-zone-pressure-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-uplift-zone-pressure-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 5, "lastVerified": "2026-09-06" }, { "slug": "roof-vent-boot-calculator", "category": "materials-quantities", "title": "Roof Vent Pipe Boot Count Calculator", "description": "Calculate the number of vent pipe flashing boots needed for a roof's plumbing/exhaust penetrations, with a spare allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-vent-boot-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-vent-boot-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-23" }, { "slug": "roof-walk-pad-calculator", "category": "materials-quantities", "title": "Roof Walk Pad Protection Panel Calculator", "description": "Calculate the number of walk pad panels needed for a protective walkway across a roof membrane.", "url": "https://craftquantities.com/calculators/materials-quantities/roof-walk-pad-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roof-walk-pad-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "roofing-shingle-calculator", "category": "renovation-construction", "title": "Roofing Shingle Calculator", "description": "Estimate the true roof area — in squares or square metres — and the shingle bundles needed, accounting for pitch.", "url": "https://craftquantities.com/calculators/renovation-construction/roofing-shingle-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roofing-shingle-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "roofing-squares-to-square-feet-calculator", "category": "renovation-construction", "title": "Roofing Squares to Square Feet Calculator", "description": "Convert roofing squares into square feet to check a quote against your own measurement.", "url": "https://craftquantities.com/calculators/renovation-construction/roofing-squares-to-square-feet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roofing-squares-to-square-feet-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "roofing-underlayment-calculator", "category": "renovation-construction", "title": "Roofing Underlayment Calculator", "description": "Estimate how many rolls of synthetic roofing underlayment you need beneath your shingles.", "url": "https://craftquantities.com/calculators/renovation-construction/roofing-underlayment-calculator/", "json": "https://craftquantities.com/api/v1/calculators/roofing-underlayment-calculator.json", "inputCount": 2, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-17" }, { "slug": "room-heat-loss-calculator", "category": "plumbing-hvac", "title": "Room Heat Loss and Radiator Size Calculator (Watts and BTU)", "description": "A room's design heat loss in watts and BTU/h, element by element by BS EN 12831, and the radiator size that meets it at your flow and return temperatures.", "url": "https://craftquantities.com/calculators/plumbing-hvac/room-heat-loss-calculator/", "json": "https://craftquantities.com/api/v1/calculators/room-heat-loss-calculator.json", "inputCount": 28, "testCaseCount": 14, "sourceCount": 16, "lastVerified": "2026-10-05" }, { "slug": "round-steel-pipe-weight-calculator", "category": "materials-quantities", "title": "Round Steel Pipe Weight Calculator", "description": "Calculate a round steel pipe's weight per unit length from its outer diameter and wall thickness.", "url": "https://craftquantities.com/calculators/materials-quantities/round-steel-pipe-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/round-steel-pipe-weight-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "rsi-to-r-value-calculator", "category": "insulation-efficiency", "title": "RSI to R-Value Calculator", "description": "Convert a metric RSI rating into the IP R-value US product labels and codes are written in.", "url": "https://craftquantities.com/calculators/insulation-efficiency/rsi-to-r-value-calculator/", "json": "https://craftquantities.com/api/v1/calculators/rsi-to-r-value-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-12" }, { "slug": "running-cost-to-kwh-calculator", "category": "financial-adjacent", "title": "Running Cost to kWh Calculator", "description": "Work backwards from money spent to energy used — turn a bill figure into the kilowatt-hours behind it.", "url": "https://craftquantities.com/calculators/financial-adjacent/running-cost-to-kwh-calculator/", "json": "https://craftquantities.com/api/v1/calculators/running-cost-to-kwh-calculator.json", "inputCount": 2, "testCaseCount": 4, "sourceCount": 1, "lastVerified": "2026-09-16" }, { "slug": "safety-net-barrier-area-calculator", "category": "materials-quantities", "title": "Perimeter Safety Debris Net Barrier Area Calculator", "description": "Calculate the total netting area needed to enclose a building perimeter or scaffold with debris/safety netting.", "url": "https://craftquantities.com/calculators/materials-quantities/safety-net-barrier-area-calculator/", "json": "https://craftquantities.com/api/v1/calculators/safety-net-barrier-area-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "sand-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Sand Cubic Yards to Tons Calculator", "description": "Convert a sand volume in cubic yards into short tons for suppliers who price by weight.", "url": "https://craftquantities.com/calculators/materials-quantities/sand-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sand-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "sand-fill-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Fill Sand Cubic Yards to Tons Calculator", "description": "Convert a fill sand volume into short tons for pricing, haulage and weight limits.", "url": "https://craftquantities.com/calculators/materials-quantities/sand-fill-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sand-fill-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "sand-fill-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Fill Sand Tons to Cubic Yards Calculator", "description": "Convert a fill sand tonnage into cubic yards to check coverage, capacity and storage.", "url": "https://craftquantities.com/calculators/materials-quantities/sand-fill-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sand-fill-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "sand-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Sand Tons to Cubic Yards Calculator", "description": "Convert a quoted sand tonnage into cubic yards to check it covers your area.", "url": "https://craftquantities.com/calculators/materials-quantities/sand-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sand-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "sandbag-calculator", "category": "materials-quantities", "title": "Sandbag Calculator", "description": "Estimate how many sandbags you need to build a flood or erosion control barrier.", "url": "https://craftquantities.com/calculators/materials-quantities/sandbag-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sandbag-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "scaffold-baseplate-bearing-calculator", "category": "materials-quantities", "title": "Scaffold Base Plate Bearing Pressure Calculator", "description": "Check a scaffold leg's bearing pressure on its base plate or sole board against the ground's allowable bearing capacity.", "url": "https://craftquantities.com/calculators/materials-quantities/scaffold-baseplate-bearing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/scaffold-baseplate-bearing-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "scaffold-face-area-calculator", "category": "materials-quantities", "title": "Scaffold Face Area and Hire Quantity Calculator", "description": "Work out the face area a scaffold is quoted on, with the lifts, bays and standards that go with it — and what the weekly hire adds while it stands.", "url": "https://craftquantities.com/calculators/materials-quantities/scaffold-face-area-calculator/", "json": "https://craftquantities.com/api/v1/calculators/scaffold-face-area-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-09-02" }, { "slug": "scaffold-plank-span-calculator", "category": "materials-quantities", "title": "Scaffold Plank Span Calculator (OSHA Appendix A)", "description": "Set a scaffold's support spacing beside the longest span OSHA's Appendix A gives a wood plank at light, medium or heavy duty, and count the planks.", "url": "https://craftquantities.com/calculators/materials-quantities/scaffold-plank-span-calculator/", "json": "https://craftquantities.com/api/v1/calculators/scaffold-plank-span-calculator.json", "inputCount": 6, "testCaseCount": 6, "sourceCount": 3, "lastVerified": "2026-09-21" }, { "slug": "scaffold-platform-load-calculator", "category": "materials-quantities", "title": "Scaffold Platform Load and Duty Rating Calculator", "description": "Spread the people and materials on one scaffold bay over its platform, and set the load beside OSHA's duty ratings and BS EN 12811-1's six load classes.", "url": "https://craftquantities.com/calculators/materials-quantities/scaffold-platform-load-calculator/", "json": "https://craftquantities.com/api/v1/calculators/scaffold-platform-load-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-09-21" }, { "slug": "scaffold-tie-count-calculator", "category": "materials-quantities", "title": "Scaffold Tie Count Calculator (OSHA 1926.451)", "description": "Count the ties, guys or braces OSHA requires on a supported scaffold taller than four times its base width, by tie level and position along the face.", "url": "https://craftquantities.com/calculators/materials-quantities/scaffold-tie-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/scaffold-tie-count-calculator.json", "inputCount": 4, "testCaseCount": 7, "sourceCount": 2, "lastVerified": "2026-09-21" }, { "slug": "scc-formwork-pressure-calculator", "category": "materials-quantities", "title": "SCC Formwork Lateral Pressure Calculator", "description": "Compute the full hydrostatic lateral pressure formwork must resist when pouring self-consolidating concrete (SCC).", "url": "https://craftquantities.com/calculators/materials-quantities/scc-formwork-pressure-calculator/", "json": "https://craftquantities.com/api/v1/calculators/scc-formwork-pressure-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "scissor-truss-chord-geometry-calculator", "category": "materials-quantities", "title": "Scissor Truss Chord Geometry Calculator", "description": "Calculate top and bottom chord lengths and the net vaulted-ceiling height for a scissor truss.", "url": "https://craftquantities.com/calculators/materials-quantities/scissor-truss-chord-geometry-calculator/", "json": "https://craftquantities.com/api/v1/calculators/scissor-truss-chord-geometry-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "scm-replacement-calculator", "category": "sustainability-compliance", "title": "Fly Ash / Silica Fume SCM Replacement Calculator", "description": "Split a concrete mix's cementitious content by mass into portland cement and an SCM, fly ash or silica fume, at a target replacement percentage.", "url": "https://craftquantities.com/calculators/sustainability-compliance/scm-replacement-calculator/", "json": "https://craftquantities.com/api/v1/calculators/scm-replacement-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "scrap-metal-value-calculator", "category": "materials-quantities", "title": "Scrap Metal Recycling Value Calculator", "description": "Calculate the estimated payout for a load of scrap metal, based on its weight and the current market price per unit weight.", "url": "https://craftquantities.com/calculators/materials-quantities/scrap-metal-value-calculator/", "json": "https://craftquantities.com/api/v1/calculators/scrap-metal-value-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "screed-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Floor Screed Cubic Yards to Tons Calculator", "description": "Convert a floor screed volume into short tons for ordering, haulage and storage planning.", "url": "https://craftquantities.com/calculators/materials-quantities/screed-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/screed-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "screed-thickness-calculator", "category": "materials-quantities", "title": "Floor Screed Thickness Calculator — Bonded, Unbonded and Floating", "description": "How thick a bonded, unbonded or floating sand and cement screed must be for its duty and a base out of level, with the sand, cement and bags it takes.", "url": "https://craftquantities.com/calculators/materials-quantities/screed-thickness-calculator/", "json": "https://craftquantities.com/api/v1/calculators/screed-thickness-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 8, "lastVerified": "2026-10-05" }, { "slug": "screed-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Floor Screed Tons to Cubic Yards Calculator", "description": "Convert a floor screed tonnage into cubic yards to check coverage, capacity and storage.", "url": "https://craftquantities.com/calculators/materials-quantities/screed-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/screed-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "seal-off-fitting-grout-calculator", "category": "materials-quantities", "title": "Explosion-Proof Seal-Off Compound Volume Calculator", "description": "Calculate the sealing compound volume needed to fill an explosion-proof conduit seal-off fitting.", "url": "https://craftquantities.com/calculators/materials-quantities/seal-off-fitting-grout-calculator/", "json": "https://craftquantities.com/api/v1/calculators/seal-off-fitting-grout-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "seat-wall-concrete-volume-calculator", "category": "materials-quantities", "title": "Built-In Bench/Planter Seat Wall Concrete Volume Calculator", "description": "Calculate the concrete volume needed for a built-in landscape bench or planter seat wall.", "url": "https://craftquantities.com/calculators/materials-quantities/seat-wall-concrete-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/seat-wall-concrete-volume-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "secant-pile-overlap-calculator", "category": "heavy-civil", "title": "Secant / Contiguous Pile Wall Overlap Calculator", "description": "Check whether a bored pile wall's spacing produces true secant overlap or a contiguous gap between piles.", "url": "https://craftquantities.com/calculators/heavy-civil/secant-pile-overlap-calculator/", "json": "https://craftquantities.com/api/v1/calculators/secant-pile-overlap-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "sediment-basin-sizing-calculator", "category": "heavy-civil", "title": "Sediment Basin Sizing Calculator", "description": "Size a construction sediment basin from the disturbed area draining to it, on the standard storage-per-area rule.", "url": "https://craftquantities.com/calculators/heavy-civil/sediment-basin-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sediment-basin-sizing-calculator.json", "inputCount": 3, "testCaseCount": 4, 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"https://craftquantities.com/calculators/materials-quantities/self-leveling-underlayment-calculator/", "json": "https://craftquantities.com/api/v1/calculators/self-leveling-underlayment-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "separation-geotextile-roll-calculator", "category": "auto-utility", "title": "Driveway Separation Geotextile Roll Calculator", "description": "Count the whole rolls of separation fabric a gravel drive takes once side laps, end laps, turnarounds and the road apron are all in the number.", "url": "https://craftquantities.com/calculators/auto-utility/separation-geotextile-roll-calculator/", "json": "https://craftquantities.com/api/v1/calculators/separation-geotextile-roll-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-06" }, { "slug": "septic-drain-field-calculator", "category": "plumbing-hvac", "title": "Septic Drain Field Sizing Calculator", "description": "Get a rough estimate of the drain field absorption area needed, based on daily wastewater flow and soil percolation rate.", "url": "https://craftquantities.com/calculators/plumbing-hvac/septic-drain-field-calculator/", "json": "https://craftquantities.com/api/v1/calculators/septic-drain-field-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "septic-tank-sizing-calculator", "category": "plumbing-hvac", "title": "Septic Tank Sizing Calculator", "description": "Get a rule-of-thumb minimum septic tank size based on the number of bedrooms in the home.", "url": "https://craftquantities.com/calculators/plumbing-hvac/septic-tank-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/septic-tank-sizing-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "service-panel-sizing-calculator", "category": "materials-quantities", "title": "Home Electrical Service Panel Amperage Sizing Calculator", "description": "Estimate the minimum electrical service amperage needed for a dwelling, using a simplified NEC 220 general load calculation.", "url": "https://craftquantities.com/calculators/materials-quantities/service-panel-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/service-panel-sizing-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "shaftwall-j-track-calculator", "category": "materials-quantities", "title": "Shaftwall J-Track Length Calculator", "description": "Calculate total J-track length needed for a shaftwall run, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/shaftwall-j-track-calculator/", "json": "https://craftquantities.com/api/v1/calculators/shaftwall-j-track-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "shaftwall-limiting-height-calculator", "category": "materials-quantities", "title": "Shaftwall C-H Stud Limiting Height Calculator", "description": "How high a C-H shaftwall stud runs unsupported at a given spacing and pressure before its deflection limit, and the share of it a proposed height uses.", "url": "https://craftquantities.com/calculators/materials-quantities/shaftwall-limiting-height-calculator/", "json": "https://craftquantities.com/api/v1/calculators/shaftwall-limiting-height-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-08-30" }, { "slug": "shaftwall-liner-panel-calculator", "category": "materials-quantities", "title": "Fire-Rated Shaftwall Liner Panel Count Calculator", "description": "Calculate how many shaftwall liner panels are needed to fill the stud cavities of a shaft wall assembly.", "url": "https://craftquantities.com/calculators/materials-quantities/shaftwall-liner-panel-calculator/", "json": "https://craftquantities.com/api/v1/calculators/shaftwall-liner-panel-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "shaftwall-screw-count-calculator", "category": "materials-quantities", "title": "Shaftwall Track & Stud Screw Count Calculator", "description": "Calculate total self-tapping screws for a shaftwall stud run, from the fastening schedule your tested assembly actually specifies.", "url": "https://craftquantities.com/calculators/materials-quantities/shaftwall-screw-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/shaftwall-screw-count-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "shaftwall-stud-framework-calculator", "category": "materials-quantities", "title": "Shaftwall Stud Framework Calculator", "description": "Calculate the number of shaftwall (CH/CT) studs needed for an elevator or mechanical shaft wall run.", "url": "https://craftquantities.com/calculators/materials-quantities/shaftwall-stud-framework-calculator/", "json": "https://craftquantities.com/api/v1/calculators/shaftwall-stud-framework-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "shed-anchor-kit-calculator", "category": "renovation-construction", "title": "Shed Anchor Kit Calculator", "description": "Estimate how many ground anchors you need to secure a shed against wind uplift.", "url": "https://craftquantities.com/calculators/renovation-construction/shed-anchor-kit-calculator/", "json": "https://craftquantities.com/api/v1/calculators/shed-anchor-kit-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "shed-foundation-skid-calculator", "category": "renovation-construction", "title": "Shed Foundation Skid Calculator", "description": "Estimate how many skids (runners) you need for a skid-style shed foundation.", "url": "https://craftquantities.com/calculators/renovation-construction/shed-foundation-skid-calculator/", "json": "https://craftquantities.com/api/v1/calculators/shed-foundation-skid-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "sheet-drain-rate-calculator", "category": "materials-quantities", "title": "Foundation Sheet Drain Drainage Rate Calculator", "description": "Calculate the total drainage flow capacity of a dimpled sheet drain across a foundation wall's width.", "url": "https://craftquantities.com/calculators/materials-quantities/sheet-drain-rate-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sheet-drain-rate-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "shgc-effective-shading-calculator", "category": "materials-quantities", "title": "SHGC Effective Shading Fraction Calculator", "description": "Calculate the effective solar heat gain coefficient of a window with a fixed horizontal overhang, accounting for the shadow it casts.", "url": "https://craftquantities.com/calculators/materials-quantities/shgc-effective-shading-calculator/", "json": "https://craftquantities.com/api/v1/calculators/shgc-effective-shading-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "shoring-active-pressure-calculator", "category": "heavy-civil", "title": "Excavation Shoring Lateral Active Soil Pressure Calculator (Rankine)", "description": "Estimate the lateral active earth pressure a shoring wall or trench box must resist, using the classical Rankine theory for cohesionless soil.", "url": "https://craftquantities.com/calculators/heavy-civil/shoring-active-pressure-calculator/", "json": "https://craftquantities.com/api/v1/calculators/shoring-active-pressure-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "short-circuit-current-calculator", "category": "materials-quantities", "title": "Transformer-Limited Short-Circuit Current Calculator", "description": "Estimate the maximum available short-circuit current at a transformer's secondary, limited by transformer impedance alone.", "url": "https://craftquantities.com/calculators/materials-quantities/short-circuit-current-calculator/", "json": "https://craftquantities.com/api/v1/calculators/short-circuit-current-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "sidewalk-joint-spacing-calculator", "category": "materials-quantities", "title": "Concrete Sidewalk Control Joint Spacing Calculator", "description": "Calculate the number of control joints needed along a concrete sidewalk run.", "url": "https://craftquantities.com/calculators/materials-quantities/sidewalk-joint-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sidewalk-joint-spacing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "siding-calculator", "category": "renovation-construction", "title": "Siding Calculator", "description": "Estimate the wall area, in squares or square metres, and the siding needed to cover it, minus doors and windows.", "url": "https://craftquantities.com/calculators/renovation-construction/siding-calculator/", "json": "https://craftquantities.com/api/v1/calculators/siding-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "siding-fastener-count-calculator", "category": "materials-quantities", "title": "Vinyl Siding Fastener Count Calculator", "description": "Calculate the total nails or fasteners needed for a vinyl siding installation.", "url": "https://craftquantities.com/calculators/materials-quantities/siding-fastener-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/siding-fastener-count-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "siding-j-channel-calculator", "category": "materials-quantities", "title": "Vinyl/Fiber-Cement Siding J-Channel Trim Calculator", "description": "Calculate the J-channel trim needed around window and door openings and wall edges, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/siding-j-channel-calculator/", "json": "https://craftquantities.com/api/v1/calculators/siding-j-channel-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "siding-starter-strip-calculator", "category": "materials-quantities", "title": "Vinyl Siding Starter Strip Linear Footage Calculator", "description": "Calculate the starter strip needed at the base of a vinyl siding installation, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/siding-starter-strip-calculator/", "json": "https://craftquantities.com/api/v1/calculators/siding-starter-strip-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "siding-undersill-trim-calculator", "category": "materials-quantities", "title": "Vinyl Siding Undersill/Utility Trim Calculator", "description": "Calculate the undersill (utility) trim needed at the top of a siding run beneath the soffit, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/siding-undersill-trim-calculator/", "json": "https://craftquantities.com/api/v1/calculators/siding-undersill-trim-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "sign-post-foundation-calculator", "category": "materials-quantities", "title": "Traffic Sign Post Foundation Concrete Calculator", "description": "Calculate the concrete volume needed for a cylindrical traffic sign post foundation.", "url": "https://craftquantities.com/calculators/materials-quantities/sign-post-foundation-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sign-post-foundation-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "silt-fence-run-calculator", "category": "heavy-civil", "title": "Silt Fence Run and Contributing Area Calculator", "description": "Size a silt fence run: fabric length with its J-hook returns, the posts, and whether the area draining to it stays inside your manual's limit.", "url": "https://craftquantities.com/calculators/heavy-civil/silt-fence-run-calculator/", "json": "https://craftquantities.com/api/v1/calculators/silt-fence-run-calculator.json", "inputCount": 8, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-09-06" }, { "slug": "single-phase-motor-full-load-current-calculator", "category": "electrical", "title": "Single-Phase Motor Full-Load Current Calculator (Amps from hp or kW)", "description": "The running current a single-phase motor draws at full load, from its rating in hp or kW, the voltage, and its efficiency and power factor.", "url": "https://craftquantities.com/calculators/electrical/single-phase-motor-full-load-current-calculator/", "json": "https://craftquantities.com/api/v1/calculators/single-phase-motor-full-load-current-calculator.json", "inputCount": 6, "testCaseCount": 12, "sourceCount": 5, "lastVerified": "2026-10-05" }, { "slug": "single-sided-fire-rated-board-calculator", "category": "materials-quantities", "title": "Single-Sided Fire-Rated Gypsum Board Calculator", "description": "Type X gypsum boards for a fire-rated wall boarded on one face only, a shaft or corridor face, without the both-sides doubling that over-orders it.", "url": "https://craftquantities.com/calculators/materials-quantities/single-sided-fire-rated-board-calculator/", "json": "https://craftquantities.com/api/v1/calculators/single-sided-fire-rated-board-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-09-02" }, { "slug": "site-trailer-electrical-load-calculator", "category": "materials-quantities", "title": "Temporary Site Trailer Electrical Load Calculator", "description": "Calculate the total connected electrical load and required amperage for a construction site office trailer's temporary power.", "url": "https://craftquantities.com/calculators/materials-quantities/site-trailer-electrical-load-calculator/", "json": "https://craftquantities.com/api/v1/calculators/site-trailer-electrical-load-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "site-welfare-facilities-calculator", "category": "sustainability-compliance", "title": "Site Welfare Toilets and Washing Stations Calculator", "description": "The minimum toilets and washing stations for a site headcount, from the UK workplace welfare code's table or the one OSHA sets for US construction sites.", "url": "https://craftquantities.com/calculators/sustainability-compliance/site-welfare-facilities-calculator/", "json": "https://craftquantities.com/api/v1/calculators/site-welfare-facilities-calculator.json", "inputCount": 2, "testCaseCount": 5, "sourceCount": 3, "lastVerified": "2026-09-21" }, { "slug": "skim-coat-plaster-calculator", "category": "materials-quantities", "title": "Skim Coat Plaster Calculator", "description": "Bags of finish plaster to skim a plasterboard wall or ceiling, from the area and the finished thickness the background actually needs.", "url": "https://craftquantities.com/calculators/materials-quantities/skim-coat-plaster-calculator/", "json": "https://craftquantities.com/api/v1/calculators/skim-coat-plaster-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-23" }, { "slug": "skip-and-dumpster-size-calculator", "category": "auto-utility", "title": "Skip & Dumpster Size Calculator", "description": "Work out the container size a job's waste needs, and check it against the weight limit before the volume runs out.", "url": "https://craftquantities.com/calculators/auto-utility/skip-and-dumpster-size-calculator/", "json": "https://craftquantities.com/api/v1/calculators/skip-and-dumpster-size-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "skylight-curb-flashing-calculator", "category": "materials-quantities", "title": "Skylight Curb Perimeter Flashing Length Calculator", "description": "Calculate the linear length of flashing material needed around a skylight curb's perimeter.", "url": "https://craftquantities.com/calculators/materials-quantities/skylight-curb-flashing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/skylight-curb-flashing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "skylight-curb-timber-calculator", "category": "materials-quantities", "title": "Skylight Curb Timber Calculator", "description": "The four cut pieces of a skylight curb from the rough opening, and how far the chosen board stands above the finished roof once the covering is on.", "url": "https://craftquantities.com/calculators/materials-quantities/skylight-curb-timber-calculator/", "json": "https://craftquantities.com/api/v1/calculators/skylight-curb-timber-calculator.json", "inputCount": 8, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-09-20" }, { "slug": "skylight-glazing-bar-calculator", "category": "materials-quantities", "title": "Skylight Glazing Bar Spacing Calculator", "description": "Calculate the number of structural glazing bars needed to support a skylight's glass panels within a maximum span.", "url": "https://craftquantities.com/calculators/materials-quantities/skylight-glazing-bar-calculator/", "json": "https://craftquantities.com/api/v1/calculators/skylight-glazing-bar-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "skylight-light-well-area-calculator", "category": "materials-quantities", "title": "Skylight Light Well Surface Area Calculator", "description": "Calculate the interior wall surface area of a straight skylight light well/shaft, for finish material and reflectivity planning.", "url": "https://craftquantities.com/calculators/materials-quantities/skylight-light-well-area-calculator/", "json": "https://craftquantities.com/api/v1/calculators/skylight-light-well-area-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "skylight-rough-opening-calculator", "category": "materials-quantities", "title": "Skylight Rough Opening Calculator", "description": "Calculate the framed rough opening dimensions for a skylight from the unit size and manufacturer clearance.", "url": "https://craftquantities.com/calculators/materials-quantities/skylight-rough-opening-calculator/", "json": "https://craftquantities.com/api/v1/calculators/skylight-rough-opening-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-09-05" }, { "slug": "slab-rebar-combined-mass-calculator", "category": "materials-quantities", "title": "Concrete Slab + Rebar Combined Mass Calculator", "description": "Compute the total combined mass of a reinforced concrete slab — concrete plus its rebar grid — in one result.", "url": "https://craftquantities.com/calculators/materials-quantities/slab-rebar-combined-mass-calculator/", "json": "https://craftquantities.com/api/v1/calculators/slab-rebar-combined-mass-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-03" }, { "slug": "slate-chippings-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Slate Chippings Cubic Yards to Tons Calculator", "description": "Convert a slate chippings volume into short tons for ordering, haulage and storage planning.", "url": "https://craftquantities.com/calculators/materials-quantities/slate-chippings-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/slate-chippings-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "slate-chippings-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Slate Chippings Tons to Cubic Yards Calculator", "description": "Convert a slate chippings tonnage into cubic yards to check coverage, capacity and storage.", "url": "https://craftquantities.com/calculators/materials-quantities/slate-chippings-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/slate-chippings-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "slate-shingle-course-calculator", "category": "materials-quantities", "title": "Slate Shingle Course Calculator", "description": "Calculate the number of slate shingle courses needed for a roof run, based on the slate's weather exposure.", "url": "https://craftquantities.com/calculators/materials-quantities/slate-shingle-course-calculator/", "json": "https://craftquantities.com/api/v1/calculators/slate-shingle-course-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "sleeper-retaining-wall-calculator", "category": "landscaping-outdoor", "title": "Sleeper Retaining Wall Calculator (Sleepers, Steel Posts and Post Concrete)", "description": "Sleepers, steel posts and post-hole concrete for a timber or concrete sleeper retaining wall, from the maker's or engineer's post centres and embedment.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/sleeper-retaining-wall-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sleeper-retaining-wall-calculator.json", "inputCount": 9, "testCaseCount": 3, "sourceCount": 6, "lastVerified": "2026-10-05" }, { "slug": "sling-leg-tension-calculator", "category": "heavy-civil", "title": "Sling Leg Tension and Angle Factor Calculator", "description": "What each leg of a multi-leg sling carries at the angle it hangs, and the share the heaviest leg takes when the centre of gravity is off the middle.", "url": "https://craftquantities.com/calculators/heavy-civil/sling-leg-tension-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sling-leg-tension-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-09-06" }, { "slug": "slope-degrees-to-percent-calculator", "category": "measurements-conversions", "title": "Slope Degrees to Percent Calculator", "description": "Convert a measured slope angle into a percentage gradient for drainage and civil drawings.", "url": "https://craftquantities.com/calculators/measurements-conversions/slope-degrees-to-percent-calculator/", "json": "https://craftquantities.com/api/v1/calculators/slope-degrees-to-percent-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "slope-grade-calculator", "category": "measurements-conversions", "title": "Slope & Grade Calculator", "description": "Convert a rise and run measurement into slope percentage and angle in degrees.", "url": "https://craftquantities.com/calculators/measurements-conversions/slope-grade-calculator/", "json": "https://craftquantities.com/api/v1/calculators/slope-grade-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "slope-percent-to-degrees-calculator", "category": "measurements-conversions", "title": "Slope Percent to Degrees Calculator", "description": "Convert a percentage gradient into degrees for setting out drainage, ramps and driveways.", "url": "https://craftquantities.com/calculators/measurements-conversions/slope-percent-to-degrees-calculator/", "json": "https://craftquantities.com/api/v1/calculators/slope-percent-to-degrees-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "slurry-pressure-balance-calculator", "category": "materials-quantities", "title": "Drilled Shaft Slurry Pressure Balance Calculator", "description": "Check whether bentonite (or polymer) slurry maintains a stabilizing positive pressure against groundwater at a given depth in a drilled shaft excavation.", "url": "https://craftquantities.com/calculators/materials-quantities/slurry-pressure-balance-calculator/", "json": "https://craftquantities.com/api/v1/calculators/slurry-pressure-balance-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "smoke-detector-calculator", "category": "electrical", "title": "Smoke Detector Placement Calculator", "description": "Get a rough minimum smoke detector count based on bedrooms and floors — a planning estimate, not a code inspection.", "url": "https://craftquantities.com/calculators/electrical/smoke-detector-calculator/", "json": "https://craftquantities.com/api/v1/calculators/smoke-detector-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "snow-guard-spacing-calculator", "category": "materials-quantities", "title": "Metal Roof Snow Guard Spacing Calculator", "description": "Calculate the number of snow guards needed per row along a metal roof's eave to retain sliding snow.", "url": "https://craftquantities.com/calculators/materials-quantities/snow-guard-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/snow-guard-spacing-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "snow-weight-calculator", "category": "materials-quantities", "title": "Snow Weight Calculator — What the Snow on a Roof Weighs", "description": "What the snow on a roof weighs, from its depth and the kind of snow, per area and in all: a figure for information, never a design snow load.", "url": "https://craftquantities.com/calculators/materials-quantities/snow-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/snow-weight-calculator.json", "inputCount": 4, "testCaseCount": 5, "sourceCount": 2, "lastVerified": "2026-10-05" }, { "slug": "soakaway-infiltration-rate-calculator", "category": "materials-quantities", "title": "Soakaway Infiltration Rate Calculator (BRE 365 Trial Pit)", "description": "The soil infiltration rate BRE Digest 365 takes from a trial pit: the water lost from 75% to 25% depth over the wetted area and time, on the slowest fill.", "url": "https://craftquantities.com/calculators/materials-quantities/soakaway-infiltration-rate-calculator/", "json": "https://craftquantities.com/api/v1/calculators/soakaway-infiltration-rate-calculator.json", "inputCount": 6, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-22" }, { "slug": "soakaway-storage-half-emptying-calculator", "category": "materials-quantities", "title": "Soakaway Storage and Half-Emptying Time Calculator (BRE 365)", "description": "The storage a soakaway needs at the critical storm by BRE 365, set against the store you have drawn, with the time it takes to empty to half.", "url": "https://craftquantities.com/calculators/materials-quantities/soakaway-storage-half-emptying-calculator/", "json": "https://craftquantities.com/api/v1/calculators/soakaway-storage-half-emptying-calculator.json", "inputCount": 22, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-22" }, { "slug": "sod-calculator", "category": "landscaping-outdoor", "title": "Sod Calculator", "description": "Estimate how many pieces or pallets of sod you need for a lawn area.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/sod-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sod-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "sod-staple-calculator", "category": "landscaping-outdoor", "title": "Sod Staple Calculator", "description": "Estimate how many sod staples (pins) you need to secure new sod, especially on slopes.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/sod-staple-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sod-staple-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "soffit-bulkhead-wrap-area-calculator", "category": "materials-quantities", "title": "Soffit/Bulkhead Drywall Wrap Area Calculator", "description": "Calculate the total drywall area needed to wrap a boxed-in soffit or bulkhead (two side faces plus the bottom face).", "url": "https://craftquantities.com/calculators/materials-quantities/soffit-bulkhead-wrap-area-calculator/", "json": "https://craftquantities.com/api/v1/calculators/soffit-bulkhead-wrap-area-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "soffit-panel-calculator", "category": "renovation-construction", "title": "Soffit Panel Calculator", "description": "Estimate how many soffit panels you need to cover the underside of a roof overhang.", "url": "https://craftquantities.com/calculators/renovation-construction/soffit-panel-calculator/", "json": "https://craftquantities.com/api/v1/calculators/soffit-panel-calculator.json", "inputCount": 3, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-17" }, { "slug": "soil-nail-pullout-calculator", "category": "heavy-civil", "title": "Soil Nail Pull-Out Safety Factor Calculator", "description": "Check a soil nail's pull-out safety factor against the standard FHWA minimum of 2.0.", "url": "https://craftquantities.com/calculators/heavy-civil/soil-nail-pullout-calculator/", "json": "https://craftquantities.com/api/v1/calculators/soil-nail-pullout-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "soil-phase-relationships-calculator", "category": "materials-quantities", "title": "Soil Phase Relationships Calculator (Unit Weights and Degree of Saturation)", "description": "From dry unit weight, water content and specific gravity: void ratio, porosity, degree of saturation, and moist, saturated and buoyant unit weights.", "url": "https://craftquantities.com/calculators/materials-quantities/soil-phase-relationships-calculator/", "json": "https://craftquantities.com/api/v1/calculators/soil-phase-relationships-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 1, "lastVerified": "2026-09-22" }, { "slug": "soil-relative-density-calculator", "category": "materials-quantities", "title": "Soil Relative Density Calculator", "description": "Classify a granular soil's compactness (loose to very dense) from its void ratio relative to its maximum and minimum possible void ratios.", "url": "https://craftquantities.com/calculators/materials-quantities/soil-relative-density-calculator/", "json": "https://craftquantities.com/api/v1/calculators/soil-relative-density-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 1, "lastVerified": "2026-09-03" }, { "slug": "soil-swell-shrinkage-calculator", "category": "materials-quantities", "title": "Soil Swell & Shrinkage Haul Volume Calculator", "description": "Convert an in-situ (bank) soil volume into its loose (hauled) volume and its recompacted volume, using swell and shrinkage factors.", "url": "https://craftquantities.com/calculators/materials-quantities/soil-swell-shrinkage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/soil-swell-shrinkage-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "soil-unit-weight-specific-gravity-calculator", "category": "materials-quantities", "title": "Soil Unit Weight from Specific Gravity Calculator", "description": "Compute a soil's dry and saturated unit weight from its specific gravity and void ratio.", "url": "https://craftquantities.com/calculators/materials-quantities/soil-unit-weight-specific-gravity-calculator/", "json": "https://craftquantities.com/api/v1/calculators/soil-unit-weight-specific-gravity-calculator.json", "inputCount": 2, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "soil-void-ratio-calculator", "category": "materials-quantities", "title": "Soil Void Ratio Calculator", "description": "Compute a soil's void ratio from its specific gravity and dry unit weight.", "url": "https://craftquantities.com/calculators/materials-quantities/soil-void-ratio-calculator/", "json": "https://craftquantities.com/api/v1/calculators/soil-void-ratio-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "solar-mount-ballast-calculator", "category": "solar-energy", "title": "Solar Panel Roof Mount Wind Uplift Ballast Calculator", "description": "Calculate the ballast mass needed to resist wind uplift on a ballasted rooftop solar panel array.", "url": "https://craftquantities.com/calculators/solar-energy/solar-mount-ballast-calculator/", "json": "https://craftquantities.com/api/v1/calculators/solar-mount-ballast-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "solar-panel-array-sizing-calculator", "category": "solar-energy", "title": "Solar Panel Array Sizing Calculator", "description": "Estimate how many solar panels you need to meet a daily energy usage target.", "url": "https://craftquantities.com/calculators/solar-energy/solar-panel-array-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/solar-panel-array-sizing-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "solar-payback-period-calculator", "category": "solar-energy", "title": "Solar Payback Period Calculator", "description": "Estimate how many years it takes a solar panel system to pay for itself through energy savings.", "url": "https://craftquantities.com/calculators/solar-energy/solar-payback-period-calculator/", "json": "https://craftquantities.com/api/v1/calculators/solar-payback-period-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "solar-pool-heater-collector-calculator", "category": "pools-water", "title": "Solar Pool Heater Collector Size Calculator", "description": "The solar collector area a pool heater needs as a share of the pool's surface — the US Department of Energy's 50% to 100% rule, by how long you swim.", "url": "https://craftquantities.com/calculators/pools-water/solar-pool-heater-collector-calculator/", "json": "https://craftquantities.com/api/v1/calculators/solar-pool-heater-collector-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 1, "lastVerified": "2026-09-25" }, { "slug": "solar-pv-wire-sizing-calculator", "category": "solar-energy", "title": "Solar Panel PV Wire Sizing Calculator", "description": "Calculate the minimum conductor cross-sectional area needed for a PV circuit run at a target maximum voltage drop.", "url": "https://craftquantities.com/calculators/solar-energy/solar-pv-wire-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/solar-pv-wire-sizing-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "solar-row-spacing-calculator", "category": "solar-energy", "title": "Solar Array Row Spacing and Shading Pitch Calculator", "description": "How far apart tilted solar rows must sit so one does not shade the next — with the ground coverage ratio that tilt is costing you.", "url": "https://craftquantities.com/calculators/solar-energy/solar-row-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/solar-row-spacing-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-23" }, { "slug": "solar-water-heater-collector-calculator", "category": "solar-energy", "title": "Solar Water Heater Collector Size Calculator", "description": "The collector area a household's solar water heater needs by the US Department of Energy's sizing rule, and the storage an active system pairs with it.", "url": "https://craftquantities.com/calculators/solar-energy/solar-water-heater-collector-calculator/", "json": "https://craftquantities.com/api/v1/calculators/solar-water-heater-collector-calculator.json", "inputCount": 2, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-25" }, { "slug": "solar-water-heater-savings-calculator", "category": "solar-energy", "title": "Solar Water Heater Savings Calculator", "description": "Backup energy a rated solar water heater saves a year, from the household's hot water draw, the existing heater's efficiency and the solar energy factor.", "url": "https://craftquantities.com/calculators/solar-energy/solar-water-heater-savings-calculator/", "json": "https://craftquantities.com/api/v1/calculators/solar-water-heater-savings-calculator.json", "inputCount": 10, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-25" }, { "slug": "spa-hot-tub-volume-calculator", "category": "pools-water", "title": "Hot Tub & Spa Volume Calculator", "description": "Estimate the total water in a round hot tub or spa, in gallons or litres, for chemical dosing.", "url": "https://craftquantities.com/calculators/pools-water/spa-hot-tub-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/spa-hot-tub-volume-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-10-05" }, { "slug": "speed-bump-volume-calculator", "category": "materials-quantities", "title": "Speed Bump/Hump Material Volume Calculator", "description": "Calculate the asphalt or rubber material volume needed for a speed bump, accounting for its rounded cross-section.", "url": "https://craftquantities.com/calculators/materials-quantities/speed-bump-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/speed-bump-volume-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "sphere-capsule-tank-volume-calculator", "category": "materials-quantities", "title": "Sphere and Capsule Tank Volume Calculator", "description": "Contents of a spherical or vertical capsule tank at a measured depth, and why a dipstick only tells the truth through the straight middle.", "url": "https://craftquantities.com/calculators/materials-quantities/sphere-capsule-tank-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sphere-capsule-tank-volume-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-09-15" }, { "slug": "spiral-stair-headroom-calculator", "category": "materials-quantities", "title": "Spiral Stair Headroom Clearance Calculator", "description": "Check a spiral staircase's headroom clearance against the IBC's reduced minimum for spiral stairways.", "url": "https://craftquantities.com/calculators/materials-quantities/spiral-stair-headroom-calculator/", "json": "https://craftquantities.com/api/v1/calculators/spiral-stair-headroom-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "spiral-stair-helix-calculator", "category": "materials-quantities", "title": "Spiral Stair Helix Geometry Calculator", "description": "Calculate a spiral staircase's developed (unrolled) stringer length from its total rise, radius, and rotation angle.", "url": "https://craftquantities.com/calculators/materials-quantities/spiral-stair-helix-calculator/", "json": "https://craftquantities.com/api/v1/calculators/spiral-stair-helix-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "sports-floor-pad-calculator", "category": "materials-quantities", "title": "Sports/Athletic Floor Underlayment Pad Calculator", "description": "Calculate the shock-absorbing underlayment pad area needed beneath a gym or athletic floor.", "url": "https://craftquantities.com/calculators/materials-quantities/sports-floor-pad-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sports-floor-pad-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "spray-foam-insulation-calculator", "category": "insulation-efficiency", "title": "Spray Foam Insulation Calculator", "description": "Estimate how many DIY spray foam kits you need based on area and application thickness.", "url": "https://craftquantities.com/calculators/insulation-efficiency/spray-foam-insulation-calculator/", "json": "https://craftquantities.com/api/v1/calculators/spray-foam-insulation-calculator.json", "inputCount": 2, "testCaseCount": 2, 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"https://craftquantities.com/calculators/materials-quantities/spread-footing-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/spread-footing-sizing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "sprinkler-head-spacing-calculator", "category": "landscaping-outdoor", "title": "Sprinkler Head Spacing and Count Calculator", "description": "Sprinkler head centres from the published radius at design pressure, derated for wind, and the heads a square or triangular grid needs for the zone.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/sprinkler-head-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sprinkler-head-spacing-calculator.json", "inputCount": 6, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-09-02" }, { "slug": "sprinkler-precipitation-rate-calculator", "category": "landscaping-outdoor", "title": "Sprinkler Precipitation 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"https://craftquantities.com/calculators/measurements-conversions/square-feet-to-acres-calculator/", "json": "https://craftquantities.com/api/v1/calculators/square-feet-to-acres-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "square-feet-to-bricks-calculator", "category": "materials-quantities", "title": "Square Feet to Bricks Calculator", "description": "Convert a wall face area into a standard modular brick count before adding waste.", "url": "https://craftquantities.com/calculators/materials-quantities/square-feet-to-bricks-calculator/", "json": "https://craftquantities.com/api/v1/calculators/square-feet-to-bricks-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "square-feet-to-drywall-sheets-calculator", "category": "renovation-construction", "title": "Square Feet to Drywall Sheets Calculator", "description": "Convert a wall or ceiling area into 4x8 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"measurements-conversions", "title": "Square Feet to Square Metres Calculator", "description": "Convert floor, wall or roof area from square feet to square metres for metric material orders.", "url": "https://craftquantities.com/calculators/measurements-conversions/square-feet-to-square-meters-calculator/", "json": "https://craftquantities.com/api/v1/calculators/square-feet-to-square-meters-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "square-feet-to-square-yards-calculator", "category": "measurements-conversions", "title": "Square Feet to Square Yards Calculator", "description": "Convert a measured area in square feet into square yards for carpet and turf ordering.", "url": "https://craftquantities.com/calculators/measurements-conversions/square-feet-to-square-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/square-feet-to-square-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, 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"https://craftquantities.com/calculators/measurements-conversions/square-inches-to-square-millimeters-calculator/", "json": "https://craftquantities.com/api/v1/calculators/square-inches-to-square-millimeters-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-12" }, { "slug": "square-meters-per-liter-to-square-feet-per-gallon-calculator", "category": "measurements-conversions", "title": "Paint Spread Rate m²/L to ft²/gal Calculator", "description": "Convert a paint spread rate from square metres per litre to square feet per US gallon for American take-offs and ordering.", "url": "https://craftquantities.com/calculators/measurements-conversions/square-meters-per-liter-to-square-feet-per-gallon-calculator/", "json": "https://craftquantities.com/api/v1/calculators/square-meters-per-liter-to-square-feet-per-gallon-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "square-meters-to-square-feet-calculator", "category": "measurements-conversions", "title": "Square Metres to Square Feet Calculator", "description": "Convert an area in square metres to square feet for US material coverage and pricing.", "url": "https://craftquantities.com/calculators/measurements-conversions/square-meters-to-square-feet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/square-meters-to-square-feet-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "square-meters-to-square-yards-calculator", "category": "measurements-conversions", "title": "Square Metres to Square Yards Calculator", "description": "Convert a metric floor area into square yards to read a US flooring quote.", "url": "https://craftquantities.com/calculators/measurements-conversions/square-meters-to-square-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/square-meters-to-square-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-11" }, { "slug": "square-millimeters-to-square-inches-calculator", "category": "measurements-conversions", "title": "Square Millimetres to Square Inches Calculator", "description": "Convert a metric cross-sectional area into square inches, for checking metric bar and section areas against imperial tables.", "url": "https://craftquantities.com/calculators/measurements-conversions/square-millimeters-to-square-inches-calculator/", "json": "https://craftquantities.com/api/v1/calculators/square-millimeters-to-square-inches-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-12" }, { "slug": "square-yards-to-square-feet-calculator", "category": "measurements-conversions", "title": "Square Yards to Square Feet Calculator", "description": "Convert square yards to square feet for carpet, turf and paving quantities.", "url": "https://craftquantities.com/calculators/measurements-conversions/square-yards-to-square-feet-calculator/", "json": "https://craftquantities.com/api/v1/calculators/square-yards-to-square-feet-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "square-yards-to-square-meters-calculator", "category": "measurements-conversions", "title": "Square Yards to Square Metres Calculator", "description": "Convert a carpet or turf area in square yards into square metres for a metric quote.", "url": "https://craftquantities.com/calculators/measurements-conversions/square-yards-to-square-meters-calculator/", "json": "https://craftquantities.com/api/v1/calculators/square-yards-to-square-meters-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-11" }, { "slug": "ssg-bite-width-calculator", "category": "materials-quantities", "title": "Structural Silicone Glazing (SSG) Bite Width Calculator", "description": "Calculate the required structural silicone sealant bite width for a glass lite under wind load.", "url": "https://craftquantities.com/calculators/materials-quantities/ssg-bite-width-calculator/", "json": "https://craftquantities.com/api/v1/calculators/ssg-bite-width-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "stack-effect-pressure-calculator", "category": "plumbing-hvac", "title": "Stack Effect Pressure Calculator", "description": "Stack effect pressure across an opening from its height off the neutral plane and the indoor-outdoor temperature difference, and the air speed it drives.", "url": "https://craftquantities.com/calculators/plumbing-hvac/stack-effect-pressure-calculator/", "json": "https://craftquantities.com/api/v1/calculators/stack-effect-pressure-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-22" }, { "slug": "stair-calculator", "category": "renovation-construction", "title": "Stair Rise & Run Calculator", "description": "Divide a total rise into equal risers and set the rise and going beside the US IRC, England's Approved Document K, Australia's NCC or Canada's NBC.", "url": "https://craftquantities.com/calculators/renovation-construction/stair-calculator/", "json": "https://craftquantities.com/api/v1/calculators/stair-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 5, "lastVerified": "2026-10-05" }, { "slug": "stair-drop-cut-calculator", "category": "renovation-construction", "title": "Stair Stringer Drop Cut Calculator", "description": "How much to take off the bottom of a cut stringer so the first step finishes level with all the others once the treads and the floor finishes are on.", "url": "https://craftquantities.com/calculators/renovation-construction/stair-drop-cut-calculator/", "json": "https://craftquantities.com/api/v1/calculators/stair-drop-cut-calculator.json", "inputCount": 6, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-06" }, { "slug": "standing-seam-clip-count-calculator", "category": "materials-quantities", "title": "Standing Seam Metal Roof Clip Count Calculator", "description": "Calculate the total number of standing seam panel clips needed for a metal roof.", "url": "https://craftquantities.com/calculators/materials-quantities/standing-seam-clip-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/standing-seam-clip-count-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "standing-seam-thermal-movement-calculator", "category": "materials-quantities", "title": "Standing Seam Roof Thermal Movement Calculator", "description": "Calculate the linear thermal expansion/contraction movement a standing seam metal roof panel will experience across its temperature range.", "url": "https://craftquantities.com/calculators/materials-quantities/standing-seam-thermal-movement-calculator/", "json": "https://craftquantities.com/api/v1/calculators/standing-seam-thermal-movement-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-03" }, { "slug": "static-dissipative-flooring-calculator", "category": "materials-quantities", "title": "Static-Dissipative (ESD) Flooring Coverage Calculator", "description": "Calculate the conductive/static-dissipative flooring material needed for an electronics or cleanroom facility, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/static-dissipative-flooring-calculator/", "json": "https://craftquantities.com/api/v1/calculators/static-dissipative-flooring-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "static-pressure-drop-calculator", "category": "plumbing-hvac", "title": "Duct Static Pressure Calculator", "description": "Add up total external static pressure across a duct system and check it against the blower's rating.", "url": "https://craftquantities.com/calculators/plumbing-hvac/static-pressure-drop-calculator/", "json": "https://craftquantities.com/api/v1/calculators/static-pressure-drop-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-06" }, { "slug": "steel-angle-weight-calculator", "category": "materials-quantities", "title": "Steel Angle (L-Shape) Weight Calculator", "description": "Weight per metre or per foot of an equal or unequal steel angle from its legs and thickness, the figure an angle's designation never gives you.", "url": "https://craftquantities.com/calculators/materials-quantities/steel-angle-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/steel-angle-weight-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "steel-baseplate-bearing-calculator", "category": "materials-quantities", "title": "Steel Column Baseplate Concrete Bearing Pressure Calculator", "description": "Check a steel column baseplate's bearing pressure on concrete against the ACI 318 allowable bearing stress.", "url": "https://craftquantities.com/calculators/materials-quantities/steel-baseplate-bearing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/steel-baseplate-bearing-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "steel-beam-camber-calculator", "category": "materials-quantities", "title": "Structural Steel Beam Camber Calculator", "description": "Calculate recommended fabricated camber for a steel beam from its calculated dead-load deflection.", "url": "https://craftquantities.com/calculators/materials-quantities/steel-beam-camber-calculator/", "json": "https://craftquantities.com/api/v1/calculators/steel-beam-camber-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "steel-bracing-rod-weight-calculator", "category": "materials-quantities", "title": "Steel Bracing Rod Diagonal Length & Weight Calculator", "description": "Calculate the diagonal length and total weight of a steel bracing rod or cable spanning a rectangular bay.", "url": "https://craftquantities.com/calculators/materials-quantities/steel-bracing-rod-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/steel-bracing-rod-weight-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "steel-channel-weight-calculator", "category": "materials-quantities", "title": "Steel Channel (C-Shape) Weight Calculator", "description": "What a C-section channel weighs per metre or per foot, from its web and flanges, for imported, cold-formed and custom channels whose designation omits it.", "url": "https://craftquantities.com/calculators/materials-quantities/steel-channel-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/steel-channel-weight-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "steel-deck-support-spacing-calculator", "category": "materials-quantities", "title": "Steel Deck Support Beam Spacing Calculator", "description": "Calculate the number of support beams needed along a building run for a given maximum steel deck span.", "url": "https://craftquantities.com/calculators/materials-quantities/steel-deck-support-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/steel-deck-support-spacing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "steel-girder-ltb-limit-calculator", "category": "materials-quantities", "title": "Steel Girder Lateral-Torsional Buckling Limit (Lp) Calculator", "description": "Calculate the maximum unbraced length (Lp) within which a steel girder retains full plastic moment capacity.", "url": "https://craftquantities.com/calculators/materials-quantities/steel-girder-ltb-limit-calculator/", "json": "https://craftquantities.com/api/v1/calculators/steel-girder-ltb-limit-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "steel-i-beam-weight-calculator", "category": "materials-quantities", "title": "Steel I-Beam Weight-per-Length Calculator", "description": "Calculate a steel I-beam's weight per unit length from its web and flange dimensions.", "url": "https://craftquantities.com/calculators/materials-quantities/steel-i-beam-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/steel-i-beam-weight-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "steel-moment-connection-bolt-calculator", "category": "materials-quantities", "title": "Steel Moment Connection Bolt Count Calculator", "description": "Calculate the number of bolts needed in a moment connection's bolt group to resist an applied moment.", "url": "https://craftquantities.com/calculators/materials-quantities/steel-moment-connection-bolt-calculator/", "json": "https://craftquantities.com/api/v1/calculators/steel-moment-connection-bolt-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "steel-plate-mass-calculator", "category": "materials-quantities", "title": "Steel Plate Mass Calculator", "description": "Calculate a steel plate's mass from its length, width, and thickness.", "url": "https://craftquantities.com/calculators/materials-quantities/steel-plate-mass-calculator/", "json": "https://craftquantities.com/api/v1/calculators/steel-plate-mass-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "steel-primer-coverage-calculator", "category": "materials-quantities", "title": "Structural Steel Primer Coverage Calculator", "description": "Calculate primer or paint needed for structural steel members based on their perimeter, length, and count.", "url": "https://craftquantities.com/calculators/materials-quantities/steel-primer-coverage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/steel-primer-coverage-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "steel-purlin-spacing-calculator", "category": "materials-quantities", "title": "Steel Z/C Purlin Spacing Calculator", "description": "Calculate the number of steel Z or C purlin rows needed along a metal building roof run.", "url": "https://craftquantities.com/calculators/materials-quantities/steel-purlin-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/steel-purlin-spacing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "steel-stair-stringer-length-calculator", "category": "materials-quantities", "title": "Structural Steel Stair Stringer Length Calculator", "description": "Calculate the diagonal length of a steel channel/plate stair stringer from total rise and run.", "url": "https://craftquantities.com/calculators/materials-quantities/steel-stair-stringer-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/steel-stair-stringer-length-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "steel-stringer-bolt-hole-spacing-calculator", "category": "materials-quantities", "title": "Steel Stair Stringer Bolt Hole Spacing Calculator", "description": "Calculate how many evenly-spaced bolt holes are needed along a steel stair stringer's length.", "url": "https://craftquantities.com/calculators/materials-quantities/steel-stringer-bolt-hole-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/steel-stringer-bolt-hole-spacing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "stepped-foundation-calculator", "category": "materials-quantities", "title": "Stepped Foundation Calculator (Steps, Bays and Overlaps on a Slope)", "description": "How a sloping site steps a wall's foundation: the fall along the wall, the steps at a chosen height, each level bay, and Approved Document A's overlap.", "url": "https://craftquantities.com/calculators/materials-quantities/stepped-foundation-calculator/", "json": "https://craftquantities.com/api/v1/calculators/stepped-foundation-calculator.json", "inputCount": 6, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-22" }, { "slug": "stockpile-volume-calculator", "category": "materials-quantities", "title": "Stockpile Volume Calculator from Base and Angle of Repose", "description": "How much is in a stockpile, from the distance round its toe and the material's angle of repose, since its height is the one thing you cannot measure.", "url": "https://craftquantities.com/calculators/materials-quantities/stockpile-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/stockpile-volume-calculator.json", "inputCount": 3, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-15" }, { "slug": "stone-column-replacement-ratio-calculator", "category": "heavy-civil", "title": "Vibro Stone Column Area Replacement Ratio Calculator", "description": "Compute the area replacement ratio for vibro stone columns on a triangular installation grid.", "url": "https://craftquantities.com/calculators/heavy-civil/stone-column-replacement-ratio-calculator/", "json": "https://craftquantities.com/api/v1/calculators/stone-column-replacement-ratio-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "stone-slab-weight-calculator", "category": "materials-quantities", "title": "Stone Slab Weight Calculator — Worktops, Flags and Panels", "description": "What a stone slab, worktop (countertop) or flag weighs in total and per square metre or square foot, for carrying it and for what holds it up.", "url": "https://craftquantities.com/calculators/materials-quantities/stone-slab-weight-calculator/", "json": "https://craftquantities.com/api/v1/calculators/stone-slab-weight-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-15" }, { "slug": "stone-to-pounds-calculator", "category": "measurements-conversions", "title": "Stone to Pounds Calculator", "description": "Convert stone to pounds — the UK weight unit that still appears on duty ratings and load limits.", "url": "https://craftquantities.com/calculators/measurements-conversions/stone-to-pounds-calculator/", "json": "https://craftquantities.com/api/v1/calculators/stone-to-pounds-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-11" }, { "slug": "stone-veneer-corner-unit-calculator", "category": "materials-quantities", "title": "Manufactured Stone Veneer Corner Unit Calculator", "description": "Calculate how many corner stone units are needed for a manufactured stone veneer wall's outside corners.", "url": "https://craftquantities.com/calculators/materials-quantities/stone-veneer-corner-unit-calculator/", "json": "https://craftquantities.com/api/v1/calculators/stone-veneer-corner-unit-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "stone-veneer-mortar-calculator", "category": "materials-quantities", "title": "Manufactured Stone Veneer Mortar Coverage Calculator", "description": "Calculate the scratch/setting-bed mortar volume needed for a manufactured stone veneer installation.", "url": "https://craftquantities.com/calculators/materials-quantities/stone-veneer-mortar-calculator/", "json": "https://craftquantities.com/api/v1/calculators/stone-veneer-mortar-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "stone-veneer-weep-screed-calculator", "category": "materials-quantities", "title": "Stone Veneer Weep Screed Linear Footage Calculator", "description": "Calculate the weep screed needed at the base of a manufactured stone veneer wall, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/stone-veneer-weep-screed-calculator/", "json": "https://craftquantities.com/api/v1/calculators/stone-veneer-weep-screed-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "storefront-mullion-count-calculator", "category": "materials-quantities", "title": "Storefront Mullion Count Calculator", "description": "Calculate the number of interior mullions needed to divide a storefront opening into lites within a maximum width.", "url": "https://craftquantities.com/calculators/materials-quantities/storefront-mullion-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/storefront-mullion-count-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "storefront-sill-flashing-calculator", "category": "materials-quantities", "title": "Storefront Sill Flashing Calculator", "description": "Calculate the sill flashing needed for a storefront system's base, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/storefront-sill-flashing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/storefront-sill-flashing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "storefront-track-calculator", "category": "materials-quantities", "title": "Storefront Aluminum Framing Linear Footage Calculator", "description": "Calculate the total aluminum head/sill/jamb track needed for a storefront framing system, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/storefront-track-calculator/", "json": "https://craftquantities.com/api/v1/calculators/storefront-track-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "storm-drain-slope-calculator", "category": "materials-quantities", "title": "Storm Drain Pipe Slope Calculator", "description": "Calculate the slope percentage of a storm drain pipe run from its upstream and downstream invert elevations.", "url": "https://craftquantities.com/calculators/materials-quantities/storm-drain-slope-calculator/", "json": "https://craftquantities.com/api/v1/calculators/storm-drain-slope-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "structural-bolt-torque-calculator", "category": "materials-quantities", "title": "High-Strength Structural Bolt Torque Calculator (ASTM F3125)", "description": "Estimate installation torque for a high-strength structural bolt from its diameter and required pretension.", "url": "https://craftquantities.com/calculators/materials-quantities/structural-bolt-torque-calculator/", "json": "https://craftquantities.com/api/v1/calculators/structural-bolt-torque-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "structural-column-pour-calculator", "category": "materials-quantities", "title": "Structural Column Pour Calculator", "description": "Estimate the concrete volume needed to pour one or more square or rectangular structural columns.", "url": "https://craftquantities.com/calculators/materials-quantities/structural-column-pour-calculator/", "json": "https://craftquantities.com/api/v1/calculators/structural-column-pour-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "structural-glass-fin-spacing-calculator", "category": "materials-quantities", "title": "Structural Glass Fin Spacing Calculator", "description": "Calculate the number of structural glass fins needed to support a frameless glass wall within a maximum span.", "url": "https://craftquantities.com/calculators/materials-quantities/structural-glass-fin-spacing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/structural-glass-fin-spacing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "structural-steel-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Structural Steel Cubic Yards to Tons Calculator", "description": "Convert a structural steel volume into short tons for pricing, haulage and weight limits.", "url": "https://craftquantities.com/calculators/materials-quantities/structural-steel-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/structural-steel-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "structural-steel-tonnage-calculator", "category": "materials-quantities", "title": "Structural Steel Tonnage Aggregator", "description": "Calculate total steel tonnage from total linear footage and average weight per unit length.", "url": "https://craftquantities.com/calculators/materials-quantities/structural-steel-tonnage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/structural-steel-tonnage-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "structural-steel-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Structural Steel Tons to Cubic Yards Calculator", "description": "Convert a structural steel tonnage into cubic yards to check coverage, capacity and storage.", "url": "https://craftquantities.com/calculators/materials-quantities/structural-steel-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/structural-steel-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "structural-steel-weld-shear-calculator", "category": "materials-quantities", "title": "Fillet Weld Shear Capacity Calculator", "description": "Calculate a fillet weld's nominal shear capacity from its leg size, electrode strength, and length.", "url": "https://craftquantities.com/calculators/materials-quantities/structural-steel-weld-shear-calculator/", "json": "https://craftquantities.com/api/v1/calculators/structural-steel-weld-shear-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "stucco-3coat-volume-calculator", "category": "materials-quantities", "title": "Traditional 3-Coat Stucco Plaster Volume & Mass Calculator", "description": "Calculate the total plaster volume and mass for a traditional 3-coat (scratch/brown/finish) stucco application.", "url": "https://craftquantities.com/calculators/materials-quantities/stucco-3coat-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/stucco-3coat-volume-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "stucco-calculator", "category": "renovation-construction", "title": "Stucco Calculator", "description": "Estimate the bags of stucco mix needed to cover exterior walls.", "url": "https://craftquantities.com/calculators/renovation-construction/stucco-calculator/", "json": "https://craftquantities.com/api/v1/calculators/stucco-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "stucco-control-joint-calculator", "category": "materials-quantities", "title": "Stucco Vertical Control Joint Spacing Calculator", "description": "Calculate how many control joints are needed within a tall stucco wall's vertical run to control cracking.", "url": "https://craftquantities.com/calculators/materials-quantities/stucco-control-joint-calculator/", "json": "https://craftquantities.com/api/v1/calculators/stucco-control-joint-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "stucco-expansion-joint-calculator", "category": "materials-quantities", "title": "Stucco/EIFS Expansion Joint Layout Calculator", "description": "Calculate how many expansion joints are needed along a stucco or EIFS wall run within a maximum spacing.", "url": "https://craftquantities.com/calculators/materials-quantities/stucco-expansion-joint-calculator/", "json": "https://craftquantities.com/api/v1/calculators/stucco-expansion-joint-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "stucco-lath-calculator", "category": "renovation-construction", "title": "Stucco Lath Calculator", "description": "Estimate how many sheets of expanded metal lath you need beneath a stucco application.", "url": "https://craftquantities.com/calculators/renovation-construction/stucco-lath-calculator/", "json": "https://craftquantities.com/api/v1/calculators/stucco-lath-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "stud-bore-notch-limit-calculator", "category": "renovation-construction", "title": "Stud Boring and Notching Limit Calculator", "description": "Work out how large a hole may be bored through a stud and how deep a notch may be cut, before the framing has to be doubled or a protection plate added.", "url": "https://craftquantities.com/calculators/renovation-construction/stud-bore-notch-limit-calculator/", "json": "https://craftquantities.com/api/v1/calculators/stud-bore-notch-limit-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-08-30" }, { "slug": "stud-calculator", "category": "materials-quantities", "title": "Stud Calculator", "description": "Count the studs, plates and corner framing for a wall run at 16 or 24 inch (400 or 600 mm) centres, including openings.", "url": "https://craftquantities.com/calculators/materials-quantities/stud-calculator/", "json": "https://craftquantities.com/api/v1/calculators/stud-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-06" }, { "slug": "studs-to-linear-feet-16-oc-calculator", "category": "renovation-construction", "title": "Studs to Linear Feet Calculator (16 in OC)", "description": "Convert a stud count into the wall length it frames at 16 inch centres.", "url": "https://craftquantities.com/calculators/renovation-construction/studs-to-linear-feet-16-oc-calculator/", "json": "https://craftquantities.com/api/v1/calculators/studs-to-linear-feet-16-oc-calculator.json", "inputCount": 1, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "subgrade-excavation-truck-calculator", "category": "materials-quantities", "title": "Road Subgrade Excavation Truck Fleet Calculator", "description": "Calculate how many dump truck loads are needed to haul away excavated subgrade material.", "url": "https://craftquantities.com/calculators/materials-quantities/subgrade-excavation-truck-calculator/", "json": "https://craftquantities.com/api/v1/calculators/subgrade-excavation-truck-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "sump-discharge-pipe-calculator", "category": "materials-quantities", "title": "Sump Pump Discharge Pipe Sizing Calculator", "description": "Calculate the minimum discharge pipe diameter needed for a sump pump's flow rate at a safe maximum velocity.", "url": "https://craftquantities.com/calculators/materials-quantities/sump-discharge-pipe-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sump-discharge-pipe-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "sump-pit-catch-basin-calculator", "category": "materials-quantities", "title": "Sump Pit & Catch Basin Concrete Calculator", "description": "Estimate the concrete volume needed to pour an open-top sump pit or catch basin, accounting for the hollow interior.", "url": "https://craftquantities.com/calculators/materials-quantities/sump-pit-catch-basin-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sump-pit-catch-basin-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "sump-pump-gpm-calculator", "category": "plumbing-hvac", "title": "Sump Pump GPM Calculator", "description": "Estimate the minimum pump capacity needed for your sump basin's fill rate, in gallons or litres per minute.", "url": "https://craftquantities.com/calculators/plumbing-hvac/sump-pump-gpm-calculator/", "json": "https://craftquantities.com/api/v1/calculators/sump-pump-gpm-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-10-05" }, { "slug": "surface-bonding-cement-calculator", "category": "materials-quantities", "title": "Surface Bonding Cement and Parge Coat Calculator", "description": "Bags of surface bonding cement or parge coat for a block or masonry wall, from the area, faces coated and coat thickness, at the bag's printed coverage.", "url": "https://craftquantities.com/calculators/materials-quantities/surface-bonding-cement-calculator/", "json": "https://craftquantities.com/api/v1/calculators/surface-bonding-cement-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-10-05" }, { "slug": "surface-temperature-factor-frsi-calculator", "category": "insulation-efficiency", "title": "Surface Temperature Factor (fRsi) Calculator (BS EN ISO 13788, BRE IP 1/06)", "description": "The surface temperature factor fRsi, from a U-value or a surface temperature, beside the critical factor BRE IP 1/06 sets for the building type.", "url": "https://craftquantities.com/calculators/insulation-efficiency/surface-temperature-factor-frsi-calculator/", "json": "https://craftquantities.com/api/v1/calculators/surface-temperature-factor-frsi-calculator.json", "inputCount": 7, "testCaseCount": 8, "sourceCount": 3, "lastVerified": "2026-09-22" }, { "slug": "suspended-ceiling-wire-hanger-calculator", "category": "materials-quantities", "title": "Suspended Ceiling Wire Hanger Count Calculator", "description": "Calculate the number of suspension wire hangers needed for a drop ceiling grid at standard spacing.", "url": "https://craftquantities.com/calculators/materials-quantities/suspended-ceiling-wire-hanger-calculator/", "json": "https://craftquantities.com/api/v1/calculators/suspended-ceiling-wire-hanger-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "tank-volume-calculator", "category": "materials-quantities", "title": "Tank Volume Calculator (Litres and Gallons at Any Depth)", "description": "Capacity and contents of a cylinder, rectangular, oval or cone-bottom tank, full or at a measured depth, in litres, cubic metres, US and imperial gallons.", "url": "https://craftquantities.com/calculators/materials-quantities/tank-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/tank-volume-calculator.json", "inputCount": 25, "testCaseCount": 14, "sourceCount": 6, "lastVerified": "2026-10-05" }, { "slug": "tankless-water-heater-calculator", "category": "plumbing-hvac", "title": "Tankless Water Heater Sizing Calculator", "description": "Size an instantaneous water heater from simultaneous flow and the temperature rise your incoming water actually needs.", "url": "https://craftquantities.com/calculators/plumbing-hvac/tankless-water-heater-calculator/", "json": "https://craftquantities.com/api/v1/calculators/tankless-water-heater-calculator.json", "inputCount": 3, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-08-27" }, { "slug": "tapered-insulation-slope-calculator", "category": "materials-quantities", "title": "Tapered Roof Insulation Slope Calculator", "description": "Calculate the insulation thickness rise across a roof run needed to achieve a target drainage slope.", "url": "https://craftquantities.com/calculators/materials-quantities/tapered-insulation-slope-calculator/", "json": "https://craftquantities.com/api/v1/calculators/tapered-insulation-slope-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-09-06" }, { "slug": "temp-fence-panel-count-calculator", "category": "materials-quantities", "title": "Temporary Construction Fence Panel Count Calculator", "description": "Calculate the number of standard temporary fence panels needed to enclose a site perimeter.", "url": "https://craftquantities.com/calculators/materials-quantities/temp-fence-panel-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/temp-fence-panel-count-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "temp-fence-wind-ballast-calculator", "category": "materials-quantities", "title": "Temporary Fence Wind Load Overturning Ballast Calculator", "description": "Calculate the ballast mass needed to resist wind-induced overturning of a free-standing temporary fence panel.", "url": "https://craftquantities.com/calculators/materials-quantities/temp-fence-wind-ballast-calculator/", "json": "https://craftquantities.com/api/v1/calculators/temp-fence-wind-ballast-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "temp-ramp-slope-calculator", "category": "materials-quantities", "title": "Temporary Access Ramp Slope Compliance Calculator", "description": "Check a temporary construction access ramp's slope against the standard 1:12 maximum accessibility ratio.", "url": "https://craftquantities.com/calculators/materials-quantities/temp-ramp-slope-calculator/", "json": "https://craftquantities.com/api/v1/calculators/temp-ramp-slope-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "temperature-conversion-calculator", "category": "measurements-conversions", "title": "Temperature Conversion Calculator", "description": "Convert between Fahrenheit and Celsius for HVAC, concrete curing, and paint application specs.", "url": "https://craftquantities.com/calculators/measurements-conversions/temperature-conversion-calculator/", "json": "https://craftquantities.com/api/v1/calculators/temperature-conversion-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "temporary-needle-prop-load-calculator", "category": "materials-quantities", "title": "Needle and Prop Load Calculator (Temporary Masonry Support)", "description": "What each needle and prop holds while a wall is supported over a new opening, and the sole plate area each prop needs for the floor beneath to take it.", "url": "https://craftquantities.com/calculators/materials-quantities/temporary-needle-prop-load-calculator/", "json": "https://craftquantities.com/api/v1/calculators/temporary-needle-prop-load-calculator.json", "inputCount": 8, "testCaseCount": 3, "sourceCount": 4, "lastVerified": "2026-08-30" }, { "slug": "termination-bar-fastener-calculator", "category": "materials-quantities", "title": "Roof Membrane Termination Bar Fastener Calculator", "description": "Calculate the fasteners needed along a single-ply membrane termination bar.", "url": "https://craftquantities.com/calculators/materials-quantities/termination-bar-fastener-calculator/", "json": "https://craftquantities.com/api/v1/calculators/termination-bar-fastener-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "terrazzo-divider-strip-calculator", "category": "materials-quantities", "title": "Terrazzo Divider Strip Linear Footage Calculator", "description": "Calculate the total brass or zinc divider strip length needed for a terrazzo floor's pattern layout, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/terrazzo-divider-strip-calculator/", "json": "https://craftquantities.com/api/v1/calculators/terrazzo-divider-strip-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "terrazzo-resin-aggregate-mix-calculator", "category": "materials-quantities", "title": "Epoxy Terrazzo Resin-to-Aggregate Mix Calculator", "description": "Calculate the resin and aggregate mass needed for an epoxy terrazzo floor pour, from a target resin:aggregate ratio.", "url": "https://craftquantities.com/calculators/materials-quantities/terrazzo-resin-aggregate-mix-calculator/", "json": "https://craftquantities.com/api/v1/calculators/terrazzo-resin-aggregate-mix-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "terzaghi-bearing-capacity-calculator", "category": "materials-quantities", "title": "Shallow Foundation Bearing Capacity Calculator (Vesic Factors)", "description": "Estimate a shallow strip footing's ultimate bearing capacity from the general equation, with the Prandtl-Reissner and Vesic factors used today.", "url": "https://craftquantities.com/calculators/materials-quantities/terzaghi-bearing-capacity-calculator/", "json": "https://craftquantities.com/api/v1/calculators/terzaghi-bearing-capacity-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-06" }, { "slug": "theater-sightline-riser-calculator", "category": "materials-quantities", "title": "Theater/Auditorium Sightline Riser Height Calculator", "description": "Calculate the riser height needed for one row of raked seating so patrons can see over the row in front, using the standard C-value sightline method.", "url": "https://craftquantities.com/calculators/materials-quantities/theater-sightline-riser-calculator/", "json": "https://craftquantities.com/api/v1/calculators/theater-sightline-riser-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "thermal-break-clip-calculator", "category": "materials-quantities", "title": "Thermal Break Clip Spacing Calculator", "description": "Calculate the total number of thermal break clips needed for a continuous insulation attachment grid.", "url": "https://craftquantities.com/calculators/materials-quantities/thermal-break-clip-calculator/", "json": "https://craftquantities.com/api/v1/calculators/thermal-break-clip-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "thermal-bridge-heat-loss-calculator", "category": "insulation-efficiency", "title": "Thermal Bridge Heat Loss Calculator (ψ and χ Values)", "description": "The heat lost through an element's thermal bridges, junctions as ψ times length and point bridges as χ times count, and what they add to its U-value.", "url": "https://craftquantities.com/calculators/insulation-efficiency/thermal-bridge-heat-loss-calculator/", "json": "https://craftquantities.com/api/v1/calculators/thermal-bridge-heat-loss-calculator.json", "inputCount": 14, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-22" }, { "slug": "thermal-bridging-calculator", "category": "insulation-efficiency", "title": "Thermal Bridging Effective R-Value Calculator", "description": "Calculate a wall assembly's true effective R-value accounting for heat loss through framing (thermal bridging).", "url": "https://craftquantities.com/calculators/insulation-efficiency/thermal-bridging-calculator/", "json": "https://craftquantities.com/api/v1/calculators/thermal-bridging-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "therms-to-kwh-calculator", "category": "measurements-conversions", "title": "Therms to kWh Calculator", "description": "Convert gas billed in therms into kilowatt-hours, for comparing gas and electric running costs on the same scale.", "url": "https://craftquantities.com/calculators/measurements-conversions/therms-to-kwh-calculator/", "json": "https://craftquantities.com/api/v1/calculators/therms-to-kwh-calculator.json", "inputCount": 1, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-12" }, { "slug": "thinset-mortar-calculator", "category": "renovation-construction", "title": "Thinset & Tile Adhesive Calculator", "description": "Work out the adhesive a tiling job needs from the trowel notch, which is what actually sets the coverage.", "url": "https://craftquantities.com/calculators/renovation-construction/thinset-mortar-calculator/", "json": "https://craftquantities.com/api/v1/calculators/thinset-mortar-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 3, "lastVerified": "2026-09-05" }, { "slug": "three-phase-power-calculator", "category": "electrical", "title": "Three-Phase Power Calculator", "description": "Calculate real power (kW) for a three-phase electrical load from voltage, current, and power factor.", "url": "https://craftquantities.com/calculators/electrical/three-phase-power-calculator/", "json": "https://craftquantities.com/api/v1/calculators/three-phase-power-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "tile-adhesive-calculator", "category": "renovation-construction", "title": "Tile Adhesive Calculator", "description": "Work out how much tile adhesive an area needs from the trowel notch size and the bedding method, and how many bags that is.", "url": "https://craftquantities.com/calculators/renovation-construction/tile-adhesive-calculator/", "json": "https://craftquantities.com/api/v1/calculators/tile-adhesive-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 4, "lastVerified": "2026-09-26" }, { "slug": "tile-edge-profile-calculator", "category": "materials-quantities", "title": "Tile Edge Profile (Trim Strip) Linear Footage Calculator", "description": "Calculate the metal or plastic edge profile trim needed for exposed tile edges, with waste allowance.", "url": "https://craftquantities.com/calculators/materials-quantities/tile-edge-profile-calculator/", "json": "https://craftquantities.com/api/v1/calculators/tile-edge-profile-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "tile-grout-calculator", "category": "renovation-construction", "title": "Tile & Grout Calculator", "description": "Count the square tiles a floor or wall takes from its length, width and tile size, with a rough grout bag figure from the area alone.", "url": "https://craftquantities.com/calculators/renovation-construction/tile-grout-calculator/", "json": "https://craftquantities.com/api/v1/calculators/tile-grout-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-17" }, { "slug": "tile-layout-calculator", "category": "renovation-construction", "title": "Tile Layout Calculator", "description": "Estimate how many individual tiles you need for a floor or wall based on tile size and area.", "url": "https://craftquantities.com/calculators/renovation-construction/tile-layout-calculator/", "json": "https://craftquantities.com/api/v1/calculators/tile-layout-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "tile-levelling-clip-calculator", "category": "renovation-construction", "title": "Tile Levelling Clip and Wedge Calculator", "description": "How many levelling clips a floor or wall takes, from the joint length rather than the tile count — and why the wedge number is far smaller.", "url": "https://craftquantities.com/calculators/renovation-construction/tile-levelling-clip-calculator/", "json": "https://craftquantities.com/api/v1/calculators/tile-levelling-clip-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-23" }, { "slug": "tile-spacer-count-calculator", "category": "materials-quantities", "title": "Ceramic/Porcelain Tile Spacer Count Calculator", "description": "Calculate how many tile spacers are needed for a floor or wall tile installation, based on tile count and a spacers-per-tile factor.", "url": "https://craftquantities.com/calculators/materials-quantities/tile-spacer-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/tile-spacer-count-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "tiled-stair-calculator", "category": "renovation-construction", "title": "Tiled Stair Calculator", "description": "Tile for the treads and risers of a flight, the nosings in whole stock lengths, and the piece count that decides how long it takes.", "url": "https://craftquantities.com/calculators/renovation-construction/tiled-stair-calculator/", "json": "https://craftquantities.com/api/v1/calculators/tiled-stair-calculator.json", "inputCount": 6, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-23" }, { "slug": "timber-beam-bending-stress-calculator", "category": "materials-quantities", "title": "Timber Beam Bending Stress Calculator", "description": "Calculate actual bending stress in a rectangular timber beam from applied moment and section dimensions.", "url": "https://craftquantities.com/calculators/materials-quantities/timber-beam-bending-stress-calculator/", "json": "https://craftquantities.com/api/v1/calculators/timber-beam-bending-stress-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-22" }, { "slug": "timber-char-depth-calculator", "category": "materials-quantities", "title": "Mass Timber Char Depth & Residual Section Calculator", "description": "What a fire period takes off an exposed timber member, notional char plus the zero-strength layer, and the residual section and sanding margin it leaves.", "url": "https://craftquantities.com/calculators/materials-quantities/timber-char-depth-calculator/", "json": "https://craftquantities.com/api/v1/calculators/timber-char-depth-calculator.json", "inputCount": 6, "testCaseCount": 2, "sourceCount": 3, "lastVerified": "2026-08-30" }, { "slug": "timber-column-buckling-calculator", "category": "materials-quantities", "title": "Timber Column Euler Buckling Calculator", "description": "Calculate the critical Euler buckling load for a slender timber column.", "url": "https://craftquantities.com/calculators/materials-quantities/timber-column-buckling-calculator/", "json": "https://craftquantities.com/api/v1/calculators/timber-column-buckling-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "timber-cross-grain-shrinkage-calculator", "category": "materials-quantities", "title": "Timber Cross-Grain Shrinkage Calculator", "description": "How far timber moves across the grain between its moisture at fixing and in service, for one member and stacked up a platform-framed building.", "url": "https://craftquantities.com/calculators/materials-quantities/timber-cross-grain-shrinkage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/timber-cross-grain-shrinkage-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 4, "lastVerified": "2026-08-30" }, { "slug": "timber-fastener-withdrawal-calculator", "category": "materials-quantities", "title": "Timber Fastener Withdrawal Capacity Calculator", "description": "What a nail, screw or lag (coach) screw holds in axial withdrawal, one fastener and the group, with the end-grain rule applied rather than argued about.", "url": "https://craftquantities.com/calculators/materials-quantities/timber-fastener-withdrawal-calculator/", "json": "https://craftquantities.com/api/v1/calculators/timber-fastener-withdrawal-calculator.json", "inputCount": 7, "testCaseCount": 5, "sourceCount": 4, "lastVerified": "2026-08-30" }, { "slug": "timber-louver-shading-calculator", "category": "materials-quantities", "title": "Exterior Timber Louver Solar Shading Angle Calculator", "description": "Calculate the louver spacing needed to achieve a target solar cutoff (shading) angle.", "url": "https://craftquantities.com/calculators/materials-quantities/timber-louver-shading-calculator/", "json": "https://craftquantities.com/api/v1/calculators/timber-louver-shading-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "timber-notch-reduction-calculator", "category": "materials-quantities", "title": "Timber Beam Notch Reduction Factor Calculator", "description": "Calculate the shear stress amplification factor for a timber beam notched at its end, per NDS 3.4.3.", "url": "https://craftquantities.com/calculators/materials-quantities/timber-notch-reduction-calculator/", "json": "https://craftquantities.com/api/v1/calculators/timber-notch-reduction-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "timber-shear-connector-count-calculator", "category": "materials-quantities", "title": "Timber Shear Connector Count Calculator", "description": "How many split-ring or shear-plate connector units a joint needs: its design load divided by one unit's rated capacity from the NDS tables or maker's data.", "url": "https://craftquantities.com/calculators/materials-quantities/timber-shear-connector-count-calculator/", "json": "https://craftquantities.com/api/v1/calculators/timber-shear-connector-count-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "toe-board-compliance-calculator", "category": "materials-quantities", "title": "Guardrail Toe Board Height and Quantity Calculator", "description": "Check a platform toe board's height and gap against OSHA's fixed requirements, and calculate the linear board stock needed.", "url": "https://craftquantities.com/calculators/materials-quantities/toe-board-compliance-calculator/", "json": "https://craftquantities.com/api/v1/calculators/toe-board-compliance-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "toilet-water-usage-calculator", "category": "plumbing-hvac", "title": "Low-Flow Toilet Savings Calculator", "description": "Estimate the annual water cost savings from upgrading to a low-flow (WaterSense) toilet.", "url": "https://craftquantities.com/calculators/plumbing-hvac/toilet-water-usage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/toilet-water-usage-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "tonnes-to-tons-calculator", "category": "measurements-conversions", "title": "Metric Tonnes to Short Tons Calculator", "description": "Convert metric tonnes to US short tons for American suppliers, scales and weight limits.", "url": "https://craftquantities.com/calculators/measurements-conversions/tonnes-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/tonnes-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "tons-btu-kw-conversion-calculator", "category": "plumbing-hvac", "title": "Refrigeration Tons, BTU/h and kW Converter", "description": "Convert an air conditioner or heat pump's capacity between refrigeration tons, BTU per hour and kilowatts: a ton is 12,000 BTU/h, which is 3.517 kW.", "url": "https://craftquantities.com/calculators/plumbing-hvac/tons-btu-kw-conversion-calculator/", "json": "https://craftquantities.com/api/v1/calculators/tons-btu-kw-conversion-calculator.json", "inputCount": 3, "testCaseCount": 5, "sourceCount": 2, "lastVerified": "2026-10-05" }, { "slug": "tons-to-tonnes-calculator", "category": "measurements-conversions", "title": "Short Tons to Metric Tonnes Calculator", "description": "Convert US short tons to metric tonnes for international quotes and haulage limits.", "url": "https://craftquantities.com/calculators/measurements-conversions/tons-to-tonnes-calculator/", "json": "https://craftquantities.com/api/v1/calculators/tons-to-tonnes-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "topsoil-calculator", "category": "landscaping-outdoor", "title": "Topsoil Calculator", "description": "Estimate the topsoil needed for a garden bed or lawn area at a given fill depth, in cubic yards or cubic metres.", "url": "https://craftquantities.com/calculators/landscaping-outdoor/topsoil-calculator/", "json": "https://craftquantities.com/api/v1/calculators/topsoil-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "topsoil-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Topsoil Cubic Yards to Tons Calculator", "description": "Convert a topsoil volume in cubic yards into short tons for suppliers who price by weight.", "url": "https://craftquantities.com/calculators/materials-quantities/topsoil-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/topsoil-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "topsoil-screened-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Screened Topsoil Cubic Yards to Tons Calculator", "description": "Convert a screened topsoil volume into short tons for weight limits, haulage and disposal pricing.", "url": "https://craftquantities.com/calculators/materials-quantities/topsoil-screened-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/topsoil-screened-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "topsoil-screened-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Screened Topsoil Tons to Cubic Yards Calculator", "description": "Convert a screened topsoil tonnage into cubic yards to check capacity, coverage and storage.", "url": "https://craftquantities.com/calculators/materials-quantities/topsoil-screened-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/topsoil-screened-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "topsoil-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Topsoil Tons to Cubic Yards Calculator", "description": "Convert a quoted topsoil tonnage into cubic yards to check it covers your area.", "url": "https://craftquantities.com/calculators/materials-quantities/topsoil-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/topsoil-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "torque-wrench-conversion-calculator", "category": "measurements-conversions", "title": "Torque Conversion Calculator (ft-lb ↔ Nm)", "description": "Convert torque specs between foot-pounds and newton-meters for bolts, fasteners, and hardware.", "url": "https://craftquantities.com/calculators/measurements-conversions/torque-wrench-conversion-calculator/", "json": "https://craftquantities.com/api/v1/calculators/torque-wrench-conversion-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "trailer-ramp-length-calculator", "category": "auto-utility", "title": "Trailer Ramp Length Calculator", "description": "Find the ramp length needed to keep a load-and-unload slope at or below a target maximum grade.", "url": "https://craftquantities.com/calculators/auto-utility/trailer-ramp-length-calculator/", "json": "https://craftquantities.com/api/v1/calculators/trailer-ramp-length-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-05" }, { "slug": "transformer-sizing-calculator", "category": "electrical", "title": "Transformer Sizing Calculator", "description": "Estimate the minimum transformer kVA rating needed for a given connected electrical load.", "url": "https://craftquantities.com/calculators/electrical/transformer-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/transformer-sizing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "trap-primer-flow-calculator", "category": "materials-quantities", "title": "Trap Primer Flow Rate Calculator", "description": "Calculate the total water flow needed for a trap primer system serving multiple floor drain traps.", "url": "https://craftquantities.com/calculators/materials-quantities/trap-primer-flow-calculator/", "json": "https://craftquantities.com/api/v1/calculators/trap-primer-flow-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "trapeze-hanger-rod-sizing-calculator", "category": "materials-quantities", "title": "Cable Tray Trapeze Hanger Rod Sizing Calculator", "description": "Size the threaded hanger rod under a cable tray trapeze from the loaded tray and the trapeze spacing, and see how hard your chosen rod works in tension.", "url": "https://craftquantities.com/calculators/materials-quantities/trapeze-hanger-rod-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/trapeze-hanger-rod-sizing-calculator.json", "inputCount": 6, "testCaseCount": 2, "sourceCount": 4, "lastVerified": "2026-08-30" }, { "slug": "tree-root-protection-area-calculator", "category": "materials-quantities", "title": "Tree Root Protection Area Calculator (BS 5837 RPA and AS 4970 Notional Root Zone)", "description": "The root protection area BS 5837 sets from a tree's stem diameter, or AS 4970's root zones, for one stem or several, and how far works sit from its edge.", "url": "https://craftquantities.com/calculators/materials-quantities/tree-root-protection-area-calculator/", "json": "https://craftquantities.com/api/v1/calculators/tree-root-protection-area-calculator.json", "inputCount": 11, "testCaseCount": 8, "sourceCount": 2, "lastVerified": "2026-09-22" }, { "slug": "tremie-concrete-displacement-calculator", "category": "heavy-civil", "title": "Tremie Pipe Safe Withdrawal & Embedment Calculator", "description": "Check how far a tremie pipe can safely be raised during an underwater or drilled-shaft concrete pour without breaking the required embedment seal.", "url": "https://craftquantities.com/calculators/heavy-civil/tremie-concrete-displacement-calculator/", "json": "https://craftquantities.com/api/v1/calculators/tremie-concrete-displacement-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "trench-excavation-backfill-calculator", "category": "materials-quantities", "title": "Trench Excavation & Backfill Volume Calculator", "description": "Estimate the total excavated volume and the loose backfill material needed to fill a pipe trench.", "url": "https://craftquantities.com/calculators/materials-quantities/trench-excavation-backfill-calculator/", "json": "https://craftquantities.com/api/v1/calculators/trench-excavation-backfill-calculator.json", "inputCount": 7, "testCaseCount": 5, "sourceCount": 1, "lastVerified": "2026-09-26" }, { "slug": "trench-safety-slope-calculator", "category": "heavy-civil", "title": "Trench Sloping & Excavation Width Calculator", "description": "Top width and spoil volume for a sloped excavation, at the maximum allowable slope for a soil type a competent person has classified.", "url": "https://craftquantities.com/calculators/heavy-civil/trench-safety-slope-calculator/", "json": "https://craftquantities.com/api/v1/calculators/trench-safety-slope-calculator.json", "inputCount": 4, "testCaseCount": 5, "sourceCount": 3, "lastVerified": "2026-08-27" }, { "slug": "trial-batch-yield-adjustment-calculator", "category": "materials-quantities", "title": "Concrete Trial Batch Yield Adjustment Calculator", "description": "Correct a mix design's ingredient quantities after a trial batch's measured yield differs from the design volume (ASTM C138).", "url": "https://craftquantities.com/calculators/materials-quantities/trial-batch-yield-adjustment-calculator/", "json": "https://craftquantities.com/api/v1/calculators/trial-batch-yield-adjustment-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "triangle-calculator", "category": "measurements-conversions", "title": "Triangle Calculator — Right Triangle and Any Triangle Solver", "description": "Solve a right triangle from any two of rise, run, slope length and angle, or any triangle from three known parts: every side, every angle and the area.", "url": "https://craftquantities.com/calculators/measurements-conversions/triangle-calculator/", "json": "https://craftquantities.com/api/v1/calculators/triangle-calculator.json", "inputCount": 28, "testCaseCount": 14, "sourceCount": 4, "lastVerified": "2026-10-05" }, { "slug": "truck-load-calculator", "category": "materials-quantities", "title": "Dump Truck Load Calculator", "description": "Find how many dump truck loads it takes to deliver or haul away a given volume of material.", "url": "https://craftquantities.com/calculators/materials-quantities/truck-load-calculator/", "json": "https://craftquantities.com/api/v1/calculators/truck-load-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "truncated-pyramid-development-calculator", "category": "materials-quantities", "title": "Truncated Pyramid Flat Pattern Calculator", "description": "Develop the flat pattern for a rectangular tapered transition: the true corner edge, both face heights and the blank to cut.", "url": "https://craftquantities.com/calculators/materials-quantities/truncated-pyramid-development-calculator/", "json": "https://craftquantities.com/api/v1/calculators/truncated-pyramid-development-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-24" }, { "slug": "truss-bottom-chord-deflection-calculator", "category": "materials-quantities", "title": "Truss Bottom Chord Deflection Calculator", "description": "Check a truss bottom chord's calculated deflection (acting as a ceiling joist) against the standard L/240 ceiling limit.", "url": "https://craftquantities.com/calculators/materials-quantities/truss-bottom-chord-deflection-calculator/", "json": "https://craftquantities.com/api/v1/calculators/truss-bottom-chord-deflection-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "truss-camber-calculator", "category": "materials-quantities", "title": "Wood Truss Camber Calculator", "description": "Estimate the recommended manufactured upward camber for a wood truss from its calculated dead-load deflection.", "url": "https://craftquantities.com/calculators/materials-quantities/truss-camber-calculator/", "json": "https://craftquantities.com/api/v1/calculators/truss-camber-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "truss-heel-height-calculator", "category": "materials-quantities", "title": "Roof Truss Raised-Heel Height Calculator", "description": "Calculate the raised heel height needed on a roof truss to fit full-depth insulation at the eave.", "url": "https://craftquantities.com/calculators/materials-quantities/truss-heel-height-calculator/", "json": "https://craftquantities.com/api/v1/calculators/truss-heel-height-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "truss-plate-connector-calculator", "category": "materials-quantities", "title": "Truss Plate (MPC) Connector Sizing Calculator", "description": "Estimate required metal connector plate area per truss joint from joint load and rated tooth capacity.", "url": "https://craftquantities.com/calculators/materials-quantities/truss-plate-connector-calculator/", "json": "https://craftquantities.com/api/v1/calculators/truss-plate-connector-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "tuckpointing-repair-volume-calculator", "category": "materials-quantities", "title": "Tuckpointing Mortar Repair Volume Calculator", "description": "Estimate the mortar volume needed to repoint deteriorated masonry joints.", "url": "https://craftquantities.com/calculators/materials-quantities/tuckpointing-repair-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/tuckpointing-repair-volume-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "two-pack-paint-mixing-calculator", "category": "materials-quantities", "title": "Two-Pack Paint and Coating Mixing Calculator — Pot Life and Batch Size", "description": "How much base and hardener to mix, and how much you dare mix at once — because a two-pack's limit is the pot life rather than the size of the job.", "url": "https://craftquantities.com/calculators/materials-quantities/two-pack-paint-mixing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/two-pack-paint-mixing-calculator.json", "inputCount": 7, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-15" }, { "slug": "u-value-imperial-to-si-calculator", "category": "insulation-efficiency", "title": "U-Factor Converter (BTU/hr·ft²·°F to W/m²K)", "description": "Convert a US U-factor, from an NFRC label or an IECC or ASHRAE 90.1 table, into the metric U-value UK and European documents use, with R-value and RSI.", "url": "https://craftquantities.com/calculators/insulation-efficiency/u-value-imperial-to-si-calculator/", "json": "https://craftquantities.com/api/v1/calculators/u-value-imperial-to-si-calculator.json", "inputCount": 1, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-22" }, { "slug": "u-value-si-to-imperial-calculator", "category": "insulation-efficiency", "title": "U-Value Converter (W/m²K to BTU/hr·ft²·°F)", "description": "Convert a metric U-value, as UK and European documents state it, into the US U-factor — and see the thermal resistance in both systems beside it.", "url": "https://craftquantities.com/calculators/insulation-efficiency/u-value-si-to-imperial-calculator/", "json": "https://craftquantities.com/api/v1/calculators/u-value-si-to-imperial-calculator.json", "inputCount": 1, "testCaseCount": 3, "sourceCount": 2, "lastVerified": "2026-09-22" }, { "slug": "u-value-to-r-value-calculator", "category": "insulation-efficiency", "title": "U-Value to R-Value Calculator", "description": "Convert a U-value from a specification or datasheet into the R-value used on insulation labelling.", "url": "https://craftquantities.com/calculators/insulation-efficiency/u-value-to-r-value-calculator/", "json": "https://craftquantities.com/api/v1/calculators/u-value-to-r-value-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "uk-stamp-duty-calculator", "category": "financial-adjacent", "title": "UK Stamp Duty (SDLT) Calculator", "description": "Stamp Duty Land Tax on a residential purchase in England or Northern Ireland, with first-time buyer relief and the additional-property surcharge.", "url": "https://craftquantities.com/calculators/financial-adjacent/uk-stamp-duty-calculator/", "json": "https://craftquantities.com/api/v1/calculators/uk-stamp-duty-calculator.json", "inputCount": 2, "testCaseCount": 6, "sourceCount": 3, "lastVerified": "2026-09-06" }, { "slug": "under-slab-perimeter-foam-calculator", "category": "materials-quantities", "title": "Under-Slab Perimeter Rigid Foam Board Calculator", "description": "Calculate the rigid foam board pieces needed for a slab-edge/under-slab perimeter insulation strip.", "url": "https://craftquantities.com/calculators/materials-quantities/under-slab-perimeter-foam-calculator/", "json": "https://craftquantities.com/api/v1/calculators/under-slab-perimeter-foam-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "under-slab-seam-tape-calculator", "category": "materials-quantities", "title": "Under-Slab Vapor Barrier Seam Tape Calculator", "description": "Calculate the seam tape needed to seal overlapping vapor barrier sheets beneath a concrete slab.", "url": "https://craftquantities.com/calculators/materials-quantities/under-slab-seam-tape-calculator/", "json": "https://craftquantities.com/api/v1/calculators/under-slab-seam-tape-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "underfloor-heating-mat-calculator", "category": "insulation-efficiency", "title": "Electric Underfloor Heating Mat Area Calculator", "description": "The floor area an electric heating mat can cover, room area less fixtures and the wall setback, and the largest standard mat size that fits it.", "url": "https://craftquantities.com/calculators/insulation-efficiency/underfloor-heating-mat-calculator/", "json": "https://craftquantities.com/api/v1/calculators/underfloor-heating-mat-calculator.json", "inputCount": 4, "testCaseCount": 4, "sourceCount": 4, "lastVerified": "2026-09-26" }, { "slug": "underpinning-pit-volume-calculator", "category": "materials-quantities", "title": "Underpinning Pit Excavation Volume Calculator", "description": "Estimate the total excavation volume for a sequential (alternating) underpinning pit program.", "url": "https://craftquantities.com/calculators/materials-quantities/underpinning-pit-volume-calculator/", "json": "https://craftquantities.com/api/v1/calculators/underpinning-pit-volume-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "us-gallons-to-liters-calculator", "category": "measurements-conversions", "title": "US Gallons to Litres Calculator", "description": "Convert US gallons to litres for paint, adhesive and tank capacities in metric units.", "url": "https://craftquantities.com/calculators/measurements-conversions/us-gallons-to-liters-calculator/", "json": "https://craftquantities.com/api/v1/calculators/us-gallons-to-liters-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "vapor-barrier-calculator", "category": "insulation-efficiency", "title": "Vapor Barrier Calculator", "description": "Estimate how many rolls of 6-mil poly vapor barrier you need for a crawlspace or basement.", "url": "https://craftquantities.com/calculators/insulation-efficiency/vapor-barrier-calculator/", "json": "https://craftquantities.com/api/v1/calculators/vapor-barrier-calculator.json", "inputCount": 2, "testCaseCount": 3, "sourceCount": 1, "lastVerified": "2026-09-17" }, { "slug": "vapor-barrier-dewpoint-calculator", "category": "materials-quantities", "title": "Vapor Barrier Dew-Point Condensation Risk Calculator", "description": "Check whether the temperature at a vapor barrier's location within a wall assembly stays above the interior dew point.", "url": "https://craftquantities.com/calculators/materials-quantities/vapor-barrier-dewpoint-calculator/", "json": "https://craftquantities.com/api/v1/calculators/vapor-barrier-dewpoint-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "vav-reheat-coil-capacity-calculator", "category": "materials-quantities", "title": "VAV Terminal Reheat Coil Sensible Heat Capacity Calculator", "description": "Calculate the sensible heating capacity a VAV terminal's reheat coil must provide for a given airflow and target temperature rise.", "url": "https://craftquantities.com/calculators/materials-quantities/vav-reheat-coil-capacity-calculator/", "json": "https://craftquantities.com/api/v1/calculators/vav-reheat-coil-capacity-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "vegetative-roof-drainage-layer-calculator", "category": "sustainability-compliance", "title": "Vegetative (Green) Roof Drainage Layer Calculator", "description": "Calculate how many rolls of drainage/water-retention mat are needed beneath a green roof's growing medium.", "url": "https://craftquantities.com/calculators/sustainability-compliance/vegetative-roof-drainage-layer-calculator/", "json": "https://craftquantities.com/api/v1/calculators/vegetative-roof-drainage-layer-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "veneer-shelf-angle-load-calculator", "category": "materials-quantities", "title": "Masonry Veneer Shelf Angle Load Calculator", "description": "Estimate the linear load a steel shelf angle must support from the brick veneer resting on it.", "url": "https://craftquantities.com/calculators/materials-quantities/veneer-shelf-angle-load-calculator/", "json": "https://craftquantities.com/api/v1/calculators/veneer-shelf-angle-load-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "vibration-isolator-deflection-calculator", "category": "materials-quantities", "title": "HVAC Vibration Isolation Spring Static Deflection Calculator", "description": "Calculate a spring vibration isolator's static deflection under equipment load.", "url": "https://craftquantities.com/calculators/materials-quantities/vibration-isolator-deflection-calculator/", "json": "https://craftquantities.com/api/v1/calculators/vibration-isolator-deflection-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "vinyl-sheet-seam-calculator", "category": "materials-quantities", "title": "Vinyl Sheet Flooring Roll Seam Calculator", "description": "Calculate how many seams are needed when a room's width exceeds the standard vinyl sheet roll width.", "url": "https://craftquantities.com/calculators/materials-quantities/vinyl-sheet-seam-calculator/", "json": "https://craftquantities.com/api/v1/calculators/vinyl-sheet-seam-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "wall-formwork-pressure-calculator", "category": "materials-quantities", "title": "ACI 347 Wall Formwork Rate-of-Placement Pressure Calculator", "description": "Calculate the maximum lateral pressure on wall formwork from ordinary (non-SCC) concrete, using the ACI 347R rate-of-placement formula.", "url": "https://craftquantities.com/calculators/materials-quantities/wall-formwork-pressure-calculator/", "json": "https://craftquantities.com/api/v1/calculators/wall-formwork-pressure-calculator.json", "inputCount": 5, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "wall-niche-framing-calculator", "category": "materials-quantities", "title": "Decorative Wall Niche/Display Alcove Framing Calculator", "description": "Calculate the perimeter framing length needed to build a decorative wall niche or display alcove opening.", "url": "https://craftquantities.com/calculators/materials-quantities/wall-niche-framing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/wall-niche-framing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "wall-tie-density-calculator", "category": "materials-quantities", "title": "Brick Veneer Wall Tie Density Calculator", "description": "Estimate the number of wall ties needed for a brick veneer or cavity wall, per standard code coverage limits.", "url": "https://craftquantities.com/calculators/materials-quantities/wall-tie-density-calculator/", "json": "https://craftquantities.com/api/v1/calculators/wall-tie-density-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-05" }, { "slug": "wallpaper-calculator", "category": "renovation-construction", "title": "Wallpaper Calculator", "description": "Rolls of wallpaper for a room: US double rolls by wall area, or any roll counted in drops from its length and width, the wall height and pattern repeat.", "url": "https://craftquantities.com/calculators/renovation-construction/wallpaper-calculator/", "json": "https://craftquantities.com/api/v1/calculators/wallpaper-calculator.json", "inputCount": 10, "testCaseCount": 6, "sourceCount": 10, "lastVerified": "2026-10-05" }, { "slug": "wallpaper-paste-calculator", "category": "renovation-construction", "title": "Wallpaper Paste Calculator", "description": "Sachets of wallpaper paste for a number of rolls, and the water that goes with them — counted the way paste is actually sold.", "url": "https://craftquantities.com/calculators/renovation-construction/wallpaper-paste-calculator/", "json": "https://craftquantities.com/api/v1/calculators/wallpaper-paste-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-23" }, { "slug": "water-cement-ratio-strength-calculator", "category": "materials-quantities", "title": "Water-Cement Ratio and Concrete Strength Calculator (Abrams' Law)", "description": "The compressive strength a water-cement ratio is likely to give, and the ratio a target strength needs, from Abrams' empirical law.", "url": "https://craftquantities.com/calculators/materials-quantities/water-cement-ratio-strength-calculator/", "json": "https://craftquantities.com/api/v1/calculators/water-cement-ratio-strength-calculator.json", "inputCount": 4, "testCaseCount": 3, "sourceCount": 4, "lastVerified": "2026-09-15" }, { "slug": "water-feature-pump-flow-calculator", "category": "materials-quantities", "title": "Decorative Water Feature Pump Flow & Turnover Calculator", "description": "Calculate the pump flow rate needed to turn over a decorative fountain or water feature basin within a target time.", "url": "https://craftquantities.com/calculators/materials-quantities/water-feature-pump-flow-calculator/", "json": "https://craftquantities.com/api/v1/calculators/water-feature-pump-flow-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "water-hammer-surge-calculator", "category": "materials-quantities", "title": "Closed-Loop Hydronic Water Hammer Surge Pressure Calculator", "description": "Calculate the pressure surge from a sudden valve closure in a hydronic piping system, using the Joukowsky equation.", "url": "https://craftquantities.com/calculators/materials-quantities/water-hammer-surge-calculator/", "json": "https://craftquantities.com/api/v1/calculators/water-hammer-surge-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "water-heater-recovery-time-calculator", "category": "plumbing-hvac", "title": "Water Heater Recovery Time Calculator", "description": "Estimate how long a storage water heater takes to reheat a full tank after it's been drawn down.", "url": "https://craftquantities.com/calculators/plumbing-hvac/water-heater-recovery-time-calculator/", "json": "https://craftquantities.com/api/v1/calculators/water-heater-recovery-time-calculator.json", "inputCount": 5, "testCaseCount": 4, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "water-heater-sizing-calculator", "category": "plumbing-hvac", "title": "Water Heater Sizing Calculator", "description": "Get a rule-of-thumb recommended tank size, in gallons or litres, based on household size.", "url": "https://craftquantities.com/calculators/plumbing-hvac/water-heater-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/water-heater-sizing-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "water-leak-cost-calculator", "category": "financial-adjacent", "title": "Water Leak Cost Calculator", "description": "Estimate the annual cost of a running toilet or dripping fixture based on its leak rate.", "url": "https://craftquantities.com/calculators/financial-adjacent/water-leak-cost-calculator/", "json": "https://craftquantities.com/api/v1/calculators/water-leak-cost-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "water-meter-sizing-calculator", "category": "materials-quantities", "title": "Water Meter Sizing Calculator (Fixture Units)", "description": "Estimate peak water demand from total water supply fixture units, using a Hunter's curve style approximation, to help select a water meter size.", "url": "https://craftquantities.com/calculators/materials-quantities/water-meter-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/water-meter-sizing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-26" }, { "slug": "water-softener-sizing-calculator", "category": "plumbing-hvac", "title": "Water Softener Sizing Calculator", "description": "Get a recommended softener grain capacity based on household size, water hardness, and regeneration frequency.", "url": "https://craftquantities.com/calculators/plumbing-hvac/water-softener-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/water-softener-sizing-calculator.json", "inputCount": 3, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "waterproofing-membrane-roll-calculator", "category": "materials-quantities", "title": "Below-Grade Waterproofing Membrane Roll Calculator", "description": "Calculate how many rolls of below-grade waterproofing membrane are needed for a foundation wall.", "url": "https://craftquantities.com/calculators/materials-quantities/waterproofing-membrane-roll-calculator/", "json": "https://craftquantities.com/api/v1/calculators/waterproofing-membrane-roll-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "waterproofing-protection-board-calculator", "category": "materials-quantities", "title": "Foundation Waterproofing Protection Board Calculator", "description": "Calculate how many protection board sheets are needed to shield a below-grade waterproofing membrane during backfill.", "url": "https://craftquantities.com/calculators/materials-quantities/waterproofing-protection-board-calculator/", "json": "https://craftquantities.com/api/v1/calculators/waterproofing-protection-board-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "waterstop-linear-footage-calculator", "category": "materials-quantities", "title": "Waterstop Linear Footage Calculator", "description": "Estimate the total linear footage of PVC or rubber waterstop needed across all construction joints in a below-grade pour.", "url": "https://craftquantities.com/calculators/materials-quantities/waterstop-linear-footage-calculator/", "json": "https://craftquantities.com/api/v1/calculators/waterstop-linear-footage-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "watts-amps-kva-calculator", "category": "electrical", "title": "Watts, Amps and kVA Calculator (Any Voltage, AC or DC)", "description": "Convert watts to amps, amps to watts, or kVA to amps at any voltage — DC, single-phase or three-phase AC, with the power factor you enter.", "url": "https://craftquantities.com/calculators/electrical/watts-amps-kva-calculator/", "json": "https://craftquantities.com/api/v1/calculators/watts-amps-kva-calculator.json", "inputCount": 9, "testCaseCount": 15, "sourceCount": 4, "lastVerified": "2026-10-05" }, { "slug": "watts-to-amps-120v-calculator", "category": "electrical", "title": "Watts to Amps Calculator (120 V)", "description": "Convert an appliance wattage into the current it draws on a 120 V circuit, for breaker and cable checks.", "url": "https://craftquantities.com/calculators/electrical/watts-to-amps-120v-calculator/", "json": "https://craftquantities.com/api/v1/calculators/watts-to-amps-120v-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "watts-to-amps-230v-calculator", "category": "electrical", "title": "Watts to Amps Calculator (230 V)", "description": "Convert appliance wattage into current on a 230 V supply for fuse, breaker and cable selection.", "url": "https://craftquantities.com/calculators/electrical/watts-to-amps-230v-calculator/", "json": "https://craftquantities.com/api/v1/calculators/watts-to-amps-230v-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "watts-to-btu-calculator", "category": "plumbing-hvac", "title": "Watts to BTU/hr Calculator", "description": "Convert a wattage figure into BTU per hour — useful for heat-gain totals from lighting, equipment and occupants.", "url": "https://craftquantities.com/calculators/plumbing-hvac/watts-to-btu-calculator/", "json": "https://craftquantities.com/api/v1/calculators/watts-to-btu-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-09-02" }, { "slug": "weatherstripping-calculator", "category": "insulation-efficiency", "title": "Weatherstripping Calculator", "description": "Estimate the linear feet or metres of weatherstripping needed to seal door and window openings.", "url": "https://craftquantities.com/calculators/insulation-efficiency/weatherstripping-calculator/", "json": "https://craftquantities.com/api/v1/calculators/weatherstripping-calculator.json", "inputCount": 4, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "weekly-noise-exposure-calculator", "category": "sustainability-compliance", "title": "Weekly Noise Exposure (LEP,w) Calculator", "description": "Average a week of daily noise exposures into LEP,w, the figure UK and EU rules allow instead of the daily one when exposure varies markedly by day.", "url": "https://craftquantities.com/calculators/sustainability-compliance/weekly-noise-exposure-calculator/", "json": "https://craftquantities.com/api/v1/calculators/weekly-noise-exposure-calculator.json", "inputCount": 7, "testCaseCount": 4, "sourceCount": 2, "lastVerified": "2026-09-21" }, { "slug": "weeping-tile-segment-calculator", "category": "materials-quantities", "title": "Perimeter Weeping Tile Pipe Segment Calculator", "description": "Calculate how many standard-length pipe segments are needed for a foundation perimeter weeping tile (footing drain) run.", "url": "https://craftquantities.com/calculators/materials-quantities/weeping-tile-segment-calculator/", "json": "https://craftquantities.com/api/v1/calculators/weeping-tile-segment-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "weight-to-volume-material-calculator", "category": "measurements-conversions", "title": "Weight to Volume Material Calculator", "description": "Find how many cubic yards of gravel, sand, topsoil, or mulch a target delivery weight (in tons) will give you.", "url": "https://craftquantities.com/calculators/measurements-conversions/weight-to-volume-material-calculator/", "json": "https://craftquantities.com/api/v1/calculators/weight-to-volume-material-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "weight-unit-conversion-calculator", "category": "measurements-conversions", "title": "Weight Unit Conversion Calculator", "description": "Convert material or shipping weights between pounds and kilograms.", "url": "https://craftquantities.com/calculators/measurements-conversions/weight-unit-conversion-calculator/", "json": "https://craftquantities.com/api/v1/calculators/weight-unit-conversion-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-08-25" }, { "slug": "welded-wire-mesh-calculator", "category": "materials-quantities", "title": "Welded Wire Mesh Calculator — Reinforcing Mesh Sheets for a Slab", "description": "How many sheets of welded wire mesh (steel fabric) a slab takes at your sheet size and the lap on your drawing, and how many of them need cutting.", "url": "https://craftquantities.com/calculators/materials-quantities/welded-wire-mesh-calculator/", "json": "https://craftquantities.com/api/v1/calculators/welded-wire-mesh-calculator.json", "inputCount": 8, "testCaseCount": 5, "sourceCount": 6, "lastVerified": "2026-10-05" }, { "slug": "well-pressure-tank-sizing-calculator", "category": "plumbing-hvac", "title": "Well Pressure Tank Sizing Calculator", "description": "Get a recommended pressure tank size based on your pump's flow rate and a minimum pump cycle time.", "url": "https://craftquantities.com/calculators/plumbing-hvac/well-pressure-tank-sizing-calculator/", "json": "https://craftquantities.com/api/v1/calculators/well-pressure-tank-sizing-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "wellpoint-radius-influence-calculator", "category": "materials-quantities", "title": "Wellpoint Dewatering Radius of Influence Calculator (Sichardt)", "description": "Estimate the radius of influence for a dewatering wellpoint system using the Sichardt empirical formula.", "url": "https://craftquantities.com/calculators/materials-quantities/wellpoint-radius-influence-calculator/", "json": "https://craftquantities.com/api/v1/calculators/wellpoint-radius-influence-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-02" }, { "slug": "wet-concrete-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Wet Concrete Cubic Yards to Tons Calculator", "description": "Convert a wet concrete volume in cubic yards into short tons for weight-based pricing and haulage.", "url": "https://craftquantities.com/calculators/materials-quantities/wet-concrete-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/wet-concrete-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "wet-concrete-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Wet Concrete Tons to Cubic Yards Calculator", "description": "Convert a wet concrete tonnage into cubic yards to check coverage and storage space.", "url": "https://craftquantities.com/calculators/materials-quantities/wet-concrete-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/wet-concrete-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "wet-plaster-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Wet Plaster Cubic Yards to Tons Calculator", "description": "Convert a wet plaster volume into short tons for ordering, disposal and transport planning.", "url": "https://craftquantities.com/calculators/materials-quantities/wet-plaster-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/wet-plaster-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "wet-plaster-tons-to-cubic-yards-calculator", "category": "materials-quantities", "title": "Wet Plaster Tons to Cubic Yards Calculator", "description": "Convert a wet plaster tonnage into cubic yards to check storage, capacity and coverage.", "url": "https://craftquantities.com/calculators/materials-quantities/wet-plaster-tons-to-cubic-yards-calculator/", "json": "https://craftquantities.com/api/v1/calculators/wet-plaster-tons-to-cubic-yards-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": "wet-room-floor-fall-calculator", "category": "renovation-construction", "title": "Wet Room and Curbless Shower Floor Fall Calculator", "description": "Set out the fall of a wet room or curbless shower floor to its drain: the depth at the walls, the fall on each face, the screed and the area to tank.", "url": "https://craftquantities.com/calculators/renovation-construction/wet-room-floor-fall-calculator/", "json": "https://craftquantities.com/api/v1/calculators/wet-room-floor-fall-calculator.json", "inputCount": 8, "testCaseCount": 5, "sourceCount": 3, "lastVerified": "2026-09-21" }, { "slug": "wet-room-tanking-calculator", "category": "materials-quantities", "title": "Wet Room Tanking and Waterproof Membrane Calculator", "description": "Membrane, primer and reinforcing tape for a wet room — in two coats, and with the junctions counted separately, because that is where tanking fails.", "url": "https://craftquantities.com/calculators/materials-quantities/wet-room-tanking-calculator/", "json": "https://craftquantities.com/api/v1/calculators/wet-room-tanking-calculator.json", "inputCount": 5, "testCaseCount": 3, "sourceCount": 3, "lastVerified": "2026-09-26" }, { "slug": "wheelbarrow-loads-calculator", "category": "materials-quantities", "title": "Wheelbarrow Loads Calculator", "description": "Find how many wheelbarrow loads it takes to move a given volume of material by hand.", "url": "https://craftquantities.com/calculators/materials-quantities/wheelbarrow-loads-calculator/", "json": "https://craftquantities.com/api/v1/calculators/wheelbarrow-loads-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 1, "lastVerified": 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NDS load duration factor (CD) to adjust an allowable wood design value for the governing load type.", "url": "https://craftquantities.com/calculators/materials-quantities/wood-load-duration-factor-calculator/", "json": "https://craftquantities.com/api/v1/calculators/wood-load-duration-factor-calculator.json", "inputCount": 2, "testCaseCount": 2, "sourceCount": 1, "lastVerified": "2026-09-06" }, { "slug": "wood-pellets-cubic-yards-to-tons-calculator", "category": "materials-quantities", "title": "Wood Pellets Cubic Yards to Tons Calculator", "description": "Convert a wood pellets volume into short tons for ordering, disposal and transport planning.", "url": "https://craftquantities.com/calculators/materials-quantities/wood-pellets-cubic-yards-to-tons-calculator/", "json": "https://craftquantities.com/api/v1/calculators/wood-pellets-cubic-yards-to-tons-calculator.json", "inputCount": 1, "testCaseCount": 2, "sourceCount": 2, "lastVerified": "2026-08-26" }, { "slug": 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