Calculator
Paint Calculator
One gallon covers ~350 sq ft per coat. Most interiors need two coats.
Calculate Paint
Common projects
You need
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gallon
- Area
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- With 10% overage
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- Or in gallon
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- Estimated cost (US avg)
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How this calculator works
Enter your shape and dimensions in feet. The calculator multiplies them out and converts to gallon, then adds 10% overage for waste — the industry standard for paint.
Cost shown is a US national average ($42 per gallon). Regional pricing pages are coming soon.