Wall Paint Calculator

Calculate paint needed for walls minus windows and doors.

Room Length (ft)

Room Width (ft)

Wall Height (ft)

Number of Doors

Number of Windows

Coats

Coverage (ft²/gallon)

Total Wall Area

486 ft²

Minus Openings

-72 ft²

Paintable Area

414 ft²

Paint Needed

3 gal

(2.4 exact)

Tip: Standard paint coverage is ~350 ft²/gallon. Add 10% extra for textured walls. Door area ≈ 21 ft², window ≈ 15 ft².