Paint Calculator
Gallons or liters needed for any room
Area
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Gallons
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Liters
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📚 Learn more — how it works, FAQ & guide Click to expand
Learn more — how it works, FAQ & guide
Click to expand
Free paint calculator
Calculate paint needed for any room. Factor in windows, doors, ceiling, coats.
How to use this tool
- 1
Enter room dimensions
Length, width, ceiling height.
- 2
Subtract openings
Doors + windows (standard sizes or custom).
- 3
Coats + coverage
Most paints: 350-400 sq ft/gallon. Two coats recommended.
Frequently Asked Questions
Coverage per gallon
Typical latex paint: 350-400 sq ft per gallon per coat. Primer: 200-300 sq ft. Darker colors often need more coats.
Include ceiling?
Toggle ceiling option. If painting ceiling, add its area.
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