Paint Calculator

Home Improvement

Free paint calculator for any room. Enter dimensions in feet or metres, doors, windows, and number of coats to estimate paint needed — no signup required.

Unit system

Room dimensions

Length

Width

Ceiling height

Standard ceiling is 8 ft (2.4 m)

Doors

Each door deducts ~21 sq ft

Windows

Each window deducts ~15 sq ft

Number of coats

Include ceiling in estimate

Your estimate

Paintable area: 301 sq ft
Gallons needed: 1.7 gallons
Quarts (alternative): 6.9 quarts

How this calculator works

Enter your room length, width, and ceiling height (feet/metres).
Add the number of doors and windows to subtract from total wall area.
Choose whether to include the ceiling and how many coats you plan to apply.
We use 350 sq ft per gallon — a standard coverage rate for interior latex paint.

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