Paint Calculator
Tell this paint calculator your wall area, how many coats you plan to apply and the coverage rating from the paint can, and it returns the exact and rounded-up gallons you need. Most interior latex paints cover about 350 ft² per gallon on primed walls.
Your answer
3
Gallons Needed
Rounded up — buy whole cans
- Exact Gallons
- 2.29
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How it works
Formula
Gallons = (Wall Area × Coats) ÷ Coverage per Gallon
Worked example
A 400 ft² wall, 2 coats, 350 ft²/gal coverage → (400 × 2) ÷ 350 = 2.29 gallons. Round up to 3 gallons.
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Frequently asked questions
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