Paint Calculator

Estimate gallons of paint needed for four walls in a rectangular room.

Room length (feet)

Room width (feet)

Wall height (feet)

Number of coats

Doors

Windows

Estimated paint

0 gallons

Paintable wall area0 ft²

Paint coverage estimate

This calculator assumes about 350 square feet of coverage per gallon per coat and subtracts a standard allowance for doors and windows. Check the paint label for the manufacturer’s stated coverage.