Cost Per Square Foot Calculator
Cost per square foot turns lump-sum bids into numbers you can actually compare. Enter the total project cost and the finished area to get $/ft² plus the metric equivalent, a 10% contingency figure, and where the number lands against 2026 US planning bands. The bands are labeled estimates — local labor markets move them a lot — and land cost is excluded throughout.
All-in cost: materials, labor, permits, design, appliances.
Finished area, excluding land.
Context for the comparison band only — it does not change the math.
Cost per square foot
100$/ft²
- Cost per square meter
- 1,076.39$/m²
- Planning budget (10% contingency)Rule-of-thumb cushion for overruns and change orders.
- 220,000
How it was calculated
- $200000 ÷ 2000 ft² = $100.00/ft²
- $100.00/ft² × 10.7639 = $1076.39/m²
- At $100.00/ft² this sits below the $150 budget threshold for new residential (2026 US planning estimates).
How it works
Cost per square foot = total project cost ÷ total area. A $250,000 build on 2,000 ft² is $125/ft² — one division, but it turns lump sums into comparable unit costs.
Cost per square meter = $/ft² × 10.7639, the exact square-foot to square-meter conversion.
The comparison bands — budget under $150, mid-range $150–$250, high-end above $250 per ft² — are 2026 US planning estimates for new residential construction. They are context, not quotes: region, finishes, and market conditions swing them substantially.
The contingency row adds 10%, a rule-of-thumb planning cushion for overruns, change orders, and price drift between estimate and build.
Worked examples
New home budget check
$250,000 ÷ 2,000 ft² = $125.00/ft² ($1,345.49/m²), below the $150 budget threshold — realistic for modest finishes or lower-cost regions. A 10% contingency brings the planning budget to $275,000.
Kitchen renovation bid
A $48,000 bid for a 240 ft² kitchen works out to $200.00/ft² — squarely mid-range for renovations, which run higher per foot than whole-house builds because kitchens concentrate plumbing, electrical, and cabinetry into a small area.
How to measure
- Use the same area definition everywhere: gross living area for homes, finished area for renovations.
- Include everything in total cost: materials, labor, permits, design fees, and appliances.
- Exclude land, financing costs, and furniture — they distort bid-to-bid comparisons.
- Get at least three bids and compare their $/ft², not just the bottom-line totals.
- Re-run the number after scope changes; $/ft² drifts fast when finishes get upgraded.
Assumptions & limitations
Planning estimate
- Land purchase price is excluded; this is construction/renovation cost only.
- The $150/$250 per ft² bands are 2026 US planning estimates for new residential — clearly estimates, and regional labor markets shift them substantially.
- Renovation, new-home, and commercial figures are not directly comparable; the band context is calibrated to new residential.
- The 10% contingency is a rule of thumb; complex renovations often need 15–20%.
- Currency is displayed in dollars; the math works identically for any currency you enter.
Frequently asked questions
Everything it takes to deliver the finished project: materials, labor, subcontractors, permits, design and engineering fees, and appliances or fixtures in the contract. The most common mistake is comparing a materials-only number against an all-in bid — keep the definition consistent.
Land prices vary wildly by location and have nothing to do with construction efficiency. Including a $400,000 lot would make an identical house look twice as expensive per square foot as the same house on a $100,000 lot. Compare construction to construction.
It is a good sanity check, not a complete budget. Two homes at $200/ft² can differ enormously in kitchens, baths, and finishes per square foot. Use $/ft² to flag bids that are outliers, then dig into line items for the real comparison.
Renovations concentrate expensive work — demolition, tying into old systems, custom fitting — into a small footprint, with no economies of scale. A kitchen or bath remodel at $250–$400/ft² can be perfectly normal next to a $175/ft² whole-house build.
A lot. Labor rates, code requirements, and material delivery costs differ sharply between, say, the rural Midwest and coastal California. Treat the $150/$250 bands as national planning estimates and calibrate with local builder quotes for your market.