Paint Calculator

How to work out how much paint you need

1. Choose meters and liters or feet and gallons, and enter the room size.
2. Enter the number of doors and windows and tick the ceiling to include it.
3. Enter the coats and the coverage from the paint tin.

Frequently asked questions

How much does a door or window take off?

About 1.9 m² (21 ft²) per door and 1.4 m² (15 ft²) per window.

What coverage should I use?

The figure on the tin, often about 10 m² per liter or 350 to 400 ft² per gallon. Rough or porous walls need more.