Free calculator

Paint quantity calculator

Punch in the room, get the gallons and the job cost. Then send it straight into a quote your client can sign off on.

Room details

Length (ft)

Width (ft)

Ceiling height (ft)

Coats

Doors

≈21 sq ft each

Windows

≈15 sq ft each

Paint & labor

Coverage (sq ft / gallon)

Typically 300–400

Price per gallon ($)

Labor hours

Labor rate ($/hr)

Estimate

Wall area352 sq ft

Paintable area301 sq ft

Paint needed2 gal

Paint cost$90.00

Labor cost$400.00

Job total$490.00

Send to quote →

Includes 10% waste factor. Gallons rounded up — you can't buy half a gallon at the counter.

Ballpark, not gospel. This estimates materials from the numbers you punch in — always check against your supplier's specs and your own tape before ordering or quoting.