Work out how many gallons of paint a room needs. Nothing leaves your browser.
Wall area = 2 × (length + width) × height, minus 20 sq ft per door and 15 sq ft per window. Paint needed = wall area × coats ÷ coverage per gallon. Ceilings are not included.
Wall area times the number of coats, divided by the coverage of one gallon. A 12×14 ft room with 8 ft ceilings, one door and two windows needs about 2.1 gallons for two coats, so buy 3.
Most cans state about 350 sq ft per gallon on a smooth, primed surface. Rough or dark walls may need more, so check your can and change the coverage box.
No. It covers walls only. Measure the ceiling separately (length × width) if you plan to paint it.
A standard door is counted as 20 sq ft and a window as 15 sq ft. These are rough averages, so large windows or double doors will change the result slightly.
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