Paint Calculator
Work out how much paint you need for your walls.
Paint required
6.67litres
- Total area covered
- 80 m²
Coverage per litre is printed on the tin and typically 10–14 m² for emulsion.
v1.0 · Reviewed September 2026
How this is worked out
Litres are area × number of coats ÷ the coverage per litre printed on the tin.
Worked example
- Area 40 m²
- Coverage 12 m² per litre
- 2 coats
40 × 2 ÷ 12 = 6.67
6.67 litres
Assumptions and limits
- Coverage is taken from the tin, and the default of 12 m² per litre is only a typical emulsion figure.
- Bare plaster, dark colours being covered and textured surfaces all absorb more.
- Paint is sold in fixed tin sizes, so round up when buying.