Room Paint Estimation
Painting a room means calculating two separate surfaces: walls and ceiling. Wall area is the perimeter x height minus doors and windows. Ceiling area is length x width. Use wall paint for walls and ceiling paint for ceilings -- they're formulated differently (ceiling paint is thicker and more drip-resistant).
Quick EstimatesSmall bedroom (10x12): ~1.5 gal walls, ~1 gal ceiling (2 coats)
Master bedroom (14x16): ~2.5 gal walls, ~1.5 gal ceiling
Living room (16x20): ~3 gal walls, ~2 gal ceiling
Bathroom (8x10): ~1 gal walls (2 coats)
Master bedroom (14x16): ~2.5 gal walls, ~1.5 gal ceiling
Living room (16x20): ~3 gal walls, ~2 gal ceiling
Bathroom (8x10): ~1 gal walls (2 coats)
Two coats is standard for color changes. Same-color refreshes can sometimes get away with one coat if the existing surface is in good condition. New drywall always needs primer (1 coat) plus 2 coats of finish paint -- plan for 3 coats total.