Paint Coverage Calculator
Find out how much paint a job needs from the area, the number of coats and the paint's coverage rate.
Quick answer: enter your details below and click Calculate — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
P
Calculators
Enter your details below.
How to use
- Enter the total area to paint in square metres.
- Enter the number of coats and the coverage per litre from the paint tin.
- Press Calculate to see the exact litres and the whole litres to buy.
About this tool
Multiply the area to paint by the number of coats, then divide by the coverage per litre stated on the tin. The result is the exact amount needed, and the calculator also rounds it up to whole litres, since paint is sold in full tins and running short mid-wall is no fun.
Frequently asked questions
Should I subtract doors and windows from the area?
Yes, measure only the surfaces you will actually paint. Subtracting large unpainted areas gives a more accurate result.
Why round up to whole litres?
Paint is sold in whole tins, and a small surplus covers touch-ups, so buying the rounded-up amount is the practical choice.