Paint Calculator
Enter your room dimensions, wall height, number of coats and the paint's coverage to find how many litres you need — with an option to subtract doors and windows.
How to use
Enter the room width, length and wall height to get the wall area, then the number of coats and the paint's coverage (litres per m², shown on the can).
Subtract the area of large doors and windows if you like. The result is the litres needed; buy about 10% extra for touch-ups.
FAQ
What coverage should I use?
It's printed on the paint can — usually 8–12 m² per litre per coat. The default is 10; adjust it to your paint.
How many coats do I need?
Two is typical for good, even color. Dark or drastic color changes may need three.
Should I subtract doors and windows?
For accuracy you can, but leaving them in gives a safety margin. Either way, buy a little extra.
Is anything uploaded?
No — the calculation runs in your browser.