BUILDING & HOME IMPROVEMENT
Wall paint calculator
Walls only; the ceiling is excluded. Gallons are U.S. liquid gallons.
01 — 08
Eight calculators.
One clear estimate.
YOUR PROJECT
Wall paint calculator
THE MATH, EXPLAINED
How we calculate
(Room perimeter × wall height − openings) × coats ÷ coverage per coat × (1 + allowance ÷ 100). Divide by container size and round up.
Before you buy
Coverage varies with the product, texture, surface condition, and application method. The starting coverage is an example. Use the coverage and coat count on your paint label. Primer, doors, trim, and ceilings are not included.
More material calculators
Measurement and product references
Estimates use geometry and the product data you enter. Starting values are examples. Check your product label, coverage, and installation instructions before purchasing.