Paint gallon calculator

Estimate how many gallons of paint you need based on your room’s size, number of coats, and coverage.

Length (ft)

Width (ft)

Height (ft)

Coats

Coverage per gallon (sq ft)

Include ceiling

Doors (each ~21 sq ft)

Windows (each ~15 sq ft)

Extra subtract area (sq ft)

Area

Wall area352 sq ft

Doors and windows− 51 sq ft

Extra subtract− 0 sq ft

Paintable area301 sq ft

Exact gallons1.72 gal

Recommended purchase2 gallons