Paint Calculator

How much paint does a room actually need? Put in the size of the room, take off the doors and windows, choose how many coats you want, and this works out the litres — then rounds up to whole tins with a little in hand. It all happens in your browser; nothing is sent or stored.

Fine-tune the coverage

Most emulsions cover 10–13 m² per litre per coat. Check the tin.

litres of paint

Wall area
Less doors & windows
To paint, all coats

Includes a 5% allowance for touch-ups and roller loss. A gallery guess, not a quote — always check the tin's own coverage before you buy.

The figure is a planning estimate, not a promise. Coverage varies with the paint, the colour you’re covering and how the surface has been prepared, so always check the coverage printed on the tin before you buy. A fresh, porous or strongly coloured wall can drink far more on the first coat.

Looking for something to paint? Start with the kitchens & interiors guides.