Paint calculator

Litres and cans of paint for walls and ceilings.

  • Free, no sign-up
  • Runs in your browser
How it is calculated

Wall area = perimeter × height − openings (+ ceiling). Paint = area × coats ÷ coverage per litre, plus wastage. Cans = paint ÷ can size, rounded up.

Check locally: Coverage differs by product and surface; use the figure on the tin.

Questions

What coverage should I use?

Typical emulsion covers about 10–12 m² per litre per coat. Use the figure on the product.

Is anything I enter saved or sent?

No. The calculation runs in your browser. Nothing you type is sent anywhere. You can copy the result, print it or download it as a CSV.