Maker Tools
Paint Calculator
Litres and tins from wall area, coats and YOUR tin’s coverage.
✓ Free
✓ No account
◉ Runs on this device
Maker Tools
Powering up the tool…
TOOL PAINT-CALCUL
What this tool does
About the paint calculator
Opening subtraction, contingency, and coverage as an input not a guess.
How to use it
- Measure walls (width×height), sum the area.
- Subtract doors/windows.
- Enter coats and the m²/L from your chosen tin.
- Read litres with contingency and tins to buy.
Useful for
- Buy the right number of tins first trip.
- Budget paint for a whole flat.
- Compare brands honestly via their coverage figures.
Straight answers
Paint Calculator FAQ
Why do I always need a second coat?
Coverage figures assume ideal application on sealed surfaces; colour changes and fresh plaster drink more. Two coats is the realistic default, and dark-to-light can want three — the calculator makes coats explicit instead of optimistic.
Where does the coverage number come from?
YOUR tin’s label (typically 10–14 m²/L for emulsion) — brands genuinely differ, which is why it is an input here rather than a hidden average.