Page 3 of the Paint Calculators topic archive. Return to page one for the full topic guide.
For a causes-and-fixes approach, use consistent units and real package coverage, yield, rate or vehicle data, keep full precision through the math, and round only when converting to a usable quantity. The goal is to confirm.
For this “what to check first” angle, use consistent units and real package coverage, yield, rate or vehicle data, keep full precision through the math, and round only when converting to a usable quantity. The goal is.
Calculate wall area from room perimeter × wall height, subtract large openings if desired, multiply by the number of coats and divide by the paint label’s square-foot coverage per gallon.