Paint Calculator: How Many Gallons Do I Need?

Your numbers

Room length

ft

Room width

ft

Ceiling height

ft

Number of identical rooms

Doors

Each ≈ 21 sq ft

Windows

Each ≈ 15 sq ft

Coats of paint

Coverage per gallon

sq ft

Most paints: 300–400 sq ft/gal. Rough walls: 250–300.

Also paint the ceiling

Also paint trim, baseboards and door frames

Add one coat of primer on walls

Price per gallon

$

Result

Calculator by Yards And Bags Calculator · Formulas, examples and FAQ