Interior walls
Paint Calculator
Calculate paint from the full room perimeter, wall height, openings, number of coats, and the real coverage printed on your can.
Preparing calculator...
How to calculate it
- Enter room dimensions and wall height.
- Subtract the combined area of large doors and windows.
- Use the manufacturer coverage rate and planned number of coats.
Frequently asked questions
How accurate is the coverage on a paint can?+
It is a planning figure under ideal conditions. Rough walls, spraying, absorbent surfaces, and dramatic color changes can reduce real coverage.
Should primer be included?+
Calculate primer separately using its own coverage rate. Primer and finish paint usually have different spread rates and package sizes.