Paint Calculator

Estimate how many gallons and quarts of paint and primer a room or a set of rooms needs. Results are planning figures, not a quote.

This calculator needs JavaScript. Wall area is twice the length plus the width, times the ceiling height, minus 21 square feet per door and 16 square feet per window. Divide that area by the coverage on the can (often 350 to 400 square feet per gallon), multiply by the number of coats, and round up to the next quart.