Paint Calculator
A typical gallon covers about 350 square feet of smooth wall per coat. Rough texture, dark colors, and primer needs can raise the amount. Subtract large windows if you have exact openings.
Gallons needed2.29
Buy (rounded up)3
Formula
Gallons = (area × coats) ÷ coverage.
How to use this calculator
- Measure or estimate wall area.
- Choose coats (two is typical).
- Use the coverage printed on the can.
Examples
400 sq ft, 2 coats, 350 sq ft/gal
2.29 gallons, so buy 3 gallons.
FAQ
Do I include ceiling?+
Only if you are painting it. Add that area to wall area.
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