Calculate how many liters of paint are required for walls and ceilings. Subtract doors and windows, select the number of coats and enter the product coverage.
Calculate how many liters of paint are required for walls and ceilings after subtracting doors and windows.
No doors or windows have been added. The full surface will be calculated.
Wall area is calculated by multiplying the room perimeter by its height.
The ceiling area is then added when required, and doors and windows are subtracted.
The net surface is multiplied by the number of coats and divided by the coverage in square meters per liter.
General formula
Liters = area × coats ÷ coverage
Calculate the total wall and ceiling area, subtract doors and windows, multiply by the number of coats and divide by the manufacturer's stated coverage.
Many paints cover approximately 8 to 12 square meters per liter per coat, although the exact value depends on the product and surface.
Two coats are commonly applied. Some surfaces, major color changes or specialized products may require a different number.
Yes. An allowance of 5% to 10% helps account for waste, touch-ups, absorption and application differences.