Paint Calculator (Gallons for Walls)
calc_paintRead-only
Gallons of wall paint from room perimeter and height, minus doors and windows, for any number of coats. Formula: Paintable area = perimeter × height − 20 sq ft per door − 15 sq ft per window. Gallons = area × coats ÷ label coverage.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| coats | No | Coats; default 2 | |
| doors | No | Doors; default 1 | |
| windows | No | Windows; default 2 | |
| wall_height_ft | No | Wall height (ft); default 8 | |
| wall_perimeter_ft | No | Room perimeter (ft); default 48 | |
| coverage_sqft_per_gal | No | Coverage (from your can label) (sq ft/gal); default 350 |