Paint Calculator
Enter your room's length, width and wall height, take off doors and windows, and pick the number of coats to see how much paint to buy.
Room Dimensions (metres)
Calculate paint needed based on wall area and coverage rate — for home decorating and painting projects.
Formula
Paint (liters) = wall area ÷ coverage per liter × number of coats. Typical coverage: 10-12 m² per liter.
Reference Values
- •1 liter covers ≈ 10-12 m² per coat
- •Most walls need 2 coats
- •1 gallon covers ≈ 350-400 sq ft per coat
FAQ
Common questions about Paint Calculator
How we calculate this
We use the standard published formula for this calculation, and we show the working so you can check it.
Spotted a mistake? Tell us and we'll check it within a few days. See how we check our calculators.
DIY disclaimer
Estimates only. Buy a little extra, measure your actual space, and check product labels and local building rules.