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Cost Per Square Foot Calculator

Calculate the cost per square foot from a total project price and area — useful for comparing contractor quotes on an apples-to-apples basis.

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

Cost per square foot

15 USD / sq ft

High confidence
Total cost
15000 USD
Area
1000 sq ft

At the values currently entered, the cost per square foot works out to 15 USD / sq ft. Note that total cost (usd) and area (sq ft) sit at the edge of the range this calculator was checked against, so treat the output as indicative rather than settled. Figures are shown for United States, where IRC 2024 is the governing residential reference; switch the market above if you are building elsewhere.

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

  • Pure arithmetic: cost per square foot = total cost / total area

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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 do contractor quotes vary so much in $/sq ft?
Cost per square foot varies with material quality, region, project complexity, and exactly what's included (permits, demolition, finishes) — always confirm what's included before comparing two quotes' $/sq ft figures directly.
Is this the same for every room type?
No — kitchens and bathrooms cost far more per square foot than open living space due to plumbing, electrical, and fixture density. Compare like-for-like room types when possible.
Does this tell me if a quote is a good deal?
No — it's a comparison tool, not an assessment of fair pricing. Use it alongside multiple quotes and your own research into local rates.