Calculate how much paint you need for any room. Accounts for doors, windows, coats, and tin sizes.
Paint coverage varies by product, but a typical matt emulsion covers approximately 12-14 square metres per litre on a smooth, sealed surface. The first coat on bare plaster absorbs significantly more — up to 50% more — so a mist coat (diluted emulsion) is recommended first. This calculator uses standard coverage rates for each paint type and adjusts for the number of coats. It deducts doors and windows from the total wall and ceiling area so you do not over-order. When in doubt, round up to the next tin size — having a small amount left over for touch-ups is always useful.
Part of Builder Tools Calculators — free construction tools for UK tradespeople.
What are you working on?
The calculation stays the same. The output changes to suit the job.