Calculators

Paint Calculator

Plan wall and ceiling paint by coats and product coverage.

Your inputs

Room: perimeter × height for walls; length × width for the ceiling
Measurement units

BEHR lists 250–400 ft²/US gal for some interior products. Replace with your label and surface conditions.

Rooms

Enter each room once. Its perimeter determines wall area.

Room 1
Openings & exclusions
Material settings & waste

Editable planning allowance, not an optimized cutting plan.

Complete the required inputs to calculate. Check material settings for additional fields.

Results

Enter dimensions and check the material settings to calculate.

Use this calculator as a guide. Independently verify all calculations for accuracy before starting your project.

“Measure twice. Cut once”
-- dad