From this site

One project, every trade

Each calculator adds its lines to a single estimate — consolidated BOM, schedule and cash-flow included.

Open My Project →

Temperature Conversion Calculator

Convert between Fahrenheit and Celsius for HVAC, concrete curing, and paint application specs.

Computed in your browser — nothing you enter is uploaded. Figures are presented for United States against IRC 2024, and every formula is cited under regulatory standards below.

Last verified 2026-08-25 · v1.0.0

Market
Imperial · sales tax

Converted temperature

70 °F

High confidence

For the dimensions entered, expect a converted temperature of 21.1 °C. Set for United States against IRC 2024. The market selector changes both the units and the code cited.

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 — confirmed fixes become pinned regression tests.

[Schema Verified] Computed in alignment with American Concrete Institute (ACI 318-19) formulas and International Residential Code (IRC 2024) spatial boundaries.

Regulatory standards & verification citations

  • °C = (°F - 32) x 5/9; °F = °C x 9/5 + 32

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.

Frequently asked questions

Why does construction work need temperature conversion?
Many product specs (paint, concrete curing, adhesives, spray foam) list a minimum and maximum application temperature — often in whichever unit the manufacturer's home market uses, which may not match your local weather forecast's unit.
What's a typical minimum temperature for pouring concrete?
Most concrete shouldn't be poured below about 40°F (4°C) without cold-weather precautions (insulated blankets, heated water/aggregate), since freezing before it cures weakens the final strength significantly.
Is there a temperature range where exterior paint shouldn't be applied?
Yes — most exterior paints specify a minimum application temperature (often 35-50°F / 2-10°C depending on the product) and can also fail to cure properly in excessive heat, so check your specific product's label.