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Renovation & Construction

Countertop Area Calculator

Calculate total countertop area, including an optional backsplash, for quoting or material ordering.

Countertop is worktop in the UK, benchtop in Australia.

  • Answers as you type
  • Every formula cited
  • Calculated in your browser
SettingsSettings for this calculationUS
Market
Imperial · sales tax
The total length of counter along the wall(s), including corners.

Add up each straight run if the counter wraps around an L-shape or U-shape.

Tools needed: Tape measure

Standard kitchen counter depth is about 25-26 in (64-66 cm).

Islands and bathroom vanities are often shallower; check your specific cabinet depth plus overhang.

4 in (10 cm) is a standard minimal splash; set higher for a full backsplash to the cabinets, or 0 for none.

A full backsplash typically runs 16-18 in (40-46 cm) up to the underside of the upper cabinets.

Estimated countertop area needed

31.96 sq ft (total)

High confidence
Countertop surface
27.63 sq ft
Backsplash
4.33 sq ft
Then change the inputs to see how far the answer moves.

Show calculation logic

How this was calculated

Formula source(s)

  • Standard kitchen countertop depth is about 25-26 in including a 1-1.5 in overhang; backsplash height is commonly 4 in for a standard splash or full-height to the cabinets

Inputs used

Total Counter Length
13 ft
Counter Depth
25.5 in
Backsplash Height
4 in

Intermediate steps

Countertop surface
27.63 sq ft
Backsplash
4.33 sq ft
Final result31.96 sq ft (total)

What this calculation does not cover

  • This is GROSS area, with nothing deducted for the sink, the hob, tap holes or drainer grooves — which is how a fabricator quotes at the enquiry stage, because the slab has to be bought whole and the cut-outs are labour rather than savings.
  • It is not a template. Stone and engineered stone are cut to a template taken in the finished room once the base units are in and levelled, and that measurement, not this one, is what gets cut.
  • Seams, edge profiles and the extra material a book-matched or heavily veined slab needs are priced separately and can move the slab count without moving this area.

Estimated cost — your price

This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.

13 ft3.96 m25.5 in64.77 cm27.63 sq ft2.57 m²3 ft1 m

Part of bigger jobs

This trade is one line of several job takeoffs. Run the whole job and every other trade comes back with it, off the same measurements.

Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.

Sources checked 2026-08-25 · in the site-wide review of 2026-09-06 · v1.0.0

Regulatory standards & verification citations1
  1. Standard kitchen countertop depth is about 25-26 in including a 1-1.5 in overhang; backsplash height is commonly 4 in for a standard splash or full-height to the cabinets
Cite this page

Your workspace

Most jobs need more than one number. Add the calculators you need next and they open right here, underneath this one — your figures stay on screen and nothing is lost to a page change.

Tools and safety for this job

To cut and fit the worktop. Generic types, no brands, no prices.

Protection this work requires

  • Hardwood dust is a recognised carcinogen: extract at the tool and wear a P2/N95 respirator when cutting or sanding indoors.
  • Saws, grinders and breakers run above 85 dB, where hearing damage accumulates and does not recover: defenders or plugs for every cut, not just the long ones.
  • Boards, blocks and bagged material cause most lasting back injuries on small sites: two people or a lifter for full sheets, and never a bag on one shoulder up a ladder.
Show the 6 tools this job needs

Essential

  • Circular saw

  • Combination or framing square

  • Jigsaw

  • Tape measure

Recommended

  • Caulking gun

  • Dust extractor or vacuum with a fine filter

Also needed as materials: caulk and sealant cartridges, circular saw blades, jigsaw blades.

what each carpentry tool is for, and the spec that decides which to buy where one does.

Now that you have the number

These guides cover the work this quantity is for — the first ones run this calculator inside the section that raises the question.

  • Costing a Kitchen: Runs, Worktops and What Is Behind Themuses this calculator

    A kitchen supplier prices the part that unscrews. Here is how to cost the circuits, the waste run and the floor that the doors will outlive.

  • Jointing a Laminate Worktopuses this calculator

    One 3 m length, a hired jig and two cuts that cannot be taken back: choosing male and female, placing the bolts, and sealing a joint that stays shut.

  • Levelling and Scribing Kitchen Unitsuses this calculator

    The set-out left one line on the wall. This is the day eleven carcases have to meet it, and the floor, the wall and the doors all disagree about where it is.

Called something else where you work? Worktop / countertop / benchtop — the term in each market, how close the equivalence really is, and the standard that governs it.

The data behind it: Production rates by operation

How to calculate countertop area in 4 steps

  1. Total Counter LengthThe total length of counter along the wall(s), including corners.
  2. Counter DepthStandard kitchen counter depth is about 25-26 in (64-66 cm).
  3. Backsplash Height4 in (10 cm) is a standard minimal splash; set higher for a full backsplash to the cabinets, or 0 for none.
  4. Read the resultThe tool computes the result from those figures and shows the formula, its sources, and a confidence rating alongside it.

Estimated countertop area needed by total counter length

Page defaults, not your figures above.

Total Counter Lengthsq ft (total)
10 ft24.6
15 ft36.9
20 ft49.2
25 ft61.5

Frequently asked questions

Does this account for a sink or cooktop cutout?
No — this calculates gross area before cutouts. Fabricators typically still charge for the full slab area since the cutout piece usually can't be reused elsewhere.
How is this different from the Square Footage Calculator?
This one is purpose-built for counters: it derives the area from a linear counter run and standard depth, and adds a separate backsplash calculation, rather than requiring you to already know the full rectangle dimensions.
Does slab size affect how many slabs I need?
Yes, but that depends on your fabricator's specific slab sizes and seam placement — this calculator estimates total area only, which you'd then discuss with your fabricator for slab yield and seam planning.
Preliminary estimate, not certified engineering. This tool produces an indicative quantity calculation for planning purposes only — it is not a certified structural analysis, a guaranteed material takeoff, or a substitute for building department approval. Always verify measurements on-site and have a licensed contractor or structural engineer review any load-bearing, code-sensitive, or safety-critical work before purchasing materials or starting construction. Spotted an arithmetic or standards error? Report it to contact@craftquantities.com with your inputs — a confirmed fix gets a permanent check of its own, so the same mistake cannot come back.