Paint Cost Per Square Foot Calculator

Paint cost per square foot calculator: estimate paint price per sq ft and cost to paint a room from area, coats, and paint price. Free, runs in your browser.

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Calculation details
Every figure above is calculated locally in your browser from the assumptions shown. No inputs are sent anywhere. See the methodology section below for the formulas used.
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Planning estimate only, not financial, tax, or legal advice. Verify assumptions and current rules before making decisions.

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What does this calculator estimate?

Paint cost per square foot calculator: estimate paint price per sq ft and cost to paint a room from area, coats, and paint price. Free, runs in your browser.

Bar chart of paint cost per square foot by coat count
Two coats turn a $0.10 per sq ft gallon into $0.20.
Transparent methodology

How this calculator works

Formula

Materials cost per sq ft = area x coats x rate / area = coats x rate; total = materials + labor.

Worked example

800 sq ft with 2 coats at $1.75 per coat per sq ft and $300 labor: $3.50 per sq ft in materials, $3,100 all-in.

Sources

Frequently asked questions

What is a paint cost per square foot calculator?

A paint cost per square foot calculator estimates the total cost of painting a surface by factoring in its square footage, paint price per gallon, and average coverage rate. Our tool runs entirely in your browser with no signup required.

Do I need to create an account or provide any personal data to use this tool?

No. This paint cost per square foot calculator is completely no-signup and browser-based. All calculations happen locally on your device and no data is ever collected or sent to a server.

How accurate are the cost estimates from this calculator?

The paint cost per square foot calculator provides a reliable estimate based on the square footage you input and standard paint coverage averages. Actual costs may vary depending on wall condition, number of coats needed, and your local paint prices.

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Cite this tool

BoringToolsKit. “Paint Cost Per Square Foot Calculator.” boringtoolskit.com/paint-cost-per-square-foot/. Free to reference in articles, syllabi, and answer posts with a link.

Privacy: Inputs and results stay in this browser. Any future sponsored recommendation or advertisement will be clearly labeled and kept separate from the calculation.

A worked example: 800 sq ft, two coats

Say a gallon of paint covers 350 sq ft and costs $35, so one coat costs $35 / 350 = $0.10 per sq ft. Enter 0.10 as the rate, 2 as coats, 800 as area, and $250 as hired labor. The calculator multiplies rate by coats: $0.10 x 2 = $0.20 per sq ft for materials.

Then it multiplies by area: 800 x $0.20 = $160 in paint. Adding the $250 labor line gives 800 x $0.20 + $250 = $410 total. That means paint itself is 39% of the bill and labor is 61%. If you paint it yourself, the labor field is your tool and supply budget instead, and the same math tells you the DIY floor: $160 plus rollers, tape, and drop cloths.

The reverse check matters when shopping: a $60 gallon covering 350 sq ft is $0.17 per sq ft per coat, or $0.34 over two coats, which is $272 in paint for the same 800 sq ft. Paying $25 more per gallon only makes sense if it saves a third coat, which would otherwise add 800 x $0.17 = $136.

Where the estimate drifts from the receipt

Coverage assumptions are optimistic. Manufacturer figures near 400 sq ft per gallon assume smooth primed walls; rough stucco or bare drywall can drop that to 250 to 300 sq ft, pushing a real rate from $0.09 to $0.13 per sq ft per coat and inflating a 1,200 sq ft job by roughly $50 to $100. Dark colors over light walls often need a tinted primer plus two finish coats, which behaves like three coats in the math, not two.

Waste and trim are invisible to the per-sq-ft figure. Cutting in around doors, windows, and outlets typically adds 10 to 15% to paint use, so a 400 sq ft room really consumes paint for about 450 sq ft. On an exterior job, ladder time can push labor from $1.00 to $2.00 per sq ft, dwarfing the paint cost entirely.

Finally, the output is materials plus a single labor number, not a schedule. It cannot price surface repair: filling nail holes, sanding gloss, or scrubbing mildew adds prep hours that pros quote separately, often 25 to 40% of the total invoice.