Room Paint Calculator

Stop guessing how many cans to buy. Enter your room dimensions and get the exact gallons needed for walls and ceiling, accounting for doors, windows, and number of coats.

Room Length (ft)

Room Width (ft)

Ceiling Height (ft)

Doors

Windows

Coats

Paint Ceiling?

Coverage (sq ft/gal)

Wall area (all 4 walls)	—
Minus doors (21 sq ft each)	—
Minus windows (15 sq ft each)	—
Net wall area	—
Ceiling area	—
Total paintable area	—
Coverage per gallon	—
Number of coats	—