06 · Paint

Room paint calculator

Four walls, minus doors and windows, times coats. 350 sq ft per gallon. Optional ceiling. Primer is a separate trip.

Length (ft)Width (ft)Height (ft)DoorsWindowsCoats

Include the ceiling. Same 350 sq ft per gallon.

Wall area = 2 × (L + W) × H, minus 20 sq ft per door and 15 sq ft per window. Coverage is 350 sq ft/gal — a typical interior latex on a sealed wall. Dark-over-light or raw drywall needs primer; this tool does not add a primer gallon automatically.