Paint Calculator

Estimate gallons of paint from room dimensions, openings, coats, ceiling area, coverage, and an extra-material allowance.

PAINT

LOCAL NO DATA SENT

PAINT COVERAGE BENCHWALLS / CEILING / COATS / GALLONS

ROOMENTER DIMENSIONS AND COVERAGE

ROOM LENGTH — FT ROOM WIDTH — FT WALL HEIGHT — FT DOOR + WINDOW AREA — FT² COATS COVERAGE PER GALLON — FT² EXTRA / WASTE % PAINT CEILING?

Coverage varies by paint, color change, texture, primer, application method, and surface condition. Use the coverage printed on your paint can when available.

BUY—Rounded up to whole gallons for a simple purchase estimate.

WALL AREA—

CEILING AREA—

COATED AREA—

EXACT GALLONS—

HOW IT WORKSAREA × COATS + EXTRA ÷ COVERAGE

READYEnter room dimensions and paint coverage.

LOCAL TOOL: Project dimensions stay in your browser. This is a material estimate; product labels and manufacturer instructions should control actual coverage and application.

FIELD NOTE / 063

Paint quantity starts with surface area, then multiplies by coats and divides by coverage.

Wall area for a rectangular room is 2 × (length + width) × height. Subtract doors and windows, optionally add the ceiling, multiply by the number of coats, add a practical allowance, and divide by the paint's stated square-foot coverage.

Paint quantity starts with surface area, then multiplies by coats and divides by coverage.

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