Painting & Drywall
Quote the right number of gallons — no second trip to the store.
Paint Estimator
Wall area minus doors/windows, ÷ coverage × coats.
Paint needed
1.71 gal
2 coats
Net wall area
299 ft²
gross 320 ft²
Buy to the next whole gallon; keep a little for touch-ups. Primer counts as a coat on bare/patched drywall.
Painting Quick Reference
- Coverage: ~350–400 ft² per gallon on smooth walls; drop to ~250–300 on rough/porous.
- Wall area: perimeter(ft) × height(ft), then subtract doors (~21 ft²) and windows (~15 ft²).
- Two coats is the norm over primer; deep color changes may need three.
- Ceilings: length × width ÷ coverage. Add ~10% for texture (popcorn/knockdown).
