Estimate paint for walls and ceilings from room dimensions. Subtract standard doors and windows, choose the number of coats, enter the coverage from your paint data sheet and add an allowance.
0.9 × 2.1 m each
1.4 × 1.4 m each
check the technical data sheet for your paint
volume of one can
The calculator estimates wall area from the room perimeter and height, optionally adds the ceiling, subtracts openings, then applies the selected number of coats and reserve. The final area is divided by the coverage value you enter.
Coverage is not universal. Porous or textured surfaces, strong colour changes and different application methods can increase consumption. Use the manufacturer’s current technical data sheet or product label as the source for m²/L.