About this calculator
Paint gallons from wall size minus doors/windows, times coats at 350 ft²/gal.
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Gallons from wall size and coats.
Input Parameters
Calculation Summary
Paint gallons from wall size minus doors/windows, times coats at 350 ft²/gal.
350 ft² per gallon per coat is the standard estimate.
Doors count 21 ft², windows 15 ft² each.
Count it as an extra coat on bare surfaces.