Paint Calculator
Calculate gallons of paint needed for walls, ceilings, and trim. Accounts for doors, windows, number of coats, and surface texture.
Length of the room in feet
Width of the room in feet
Standard ceiling height is 8 ft. Measure floor to ceiling if yours differs.
Standard door = 21 sq ft deduction (3' x 7')
Standard window = 15 sq ft deduction (3' x 5')
Two coats is standard. One coat for same-color touch-ups.
Check the paint can label. 350 for smooth walls, 250 for textured.
Ceiling paint is usually flat/matte — may be a different product than your wall paint
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