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Paint needed for a room

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Paint needed for a room diagram
calc
The amount of paint required to decorate a room is calculated by adding the areas of the walls and subtracting area for the doors and windows (assuming an average door and window area of 2 m²).
Length
Width
Height
No. doors & windows
No. coats
Coverage

Wall paint area
Wall paint
Ceiling paint area
Ceiling paint
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notes
If you have particularly small or large doors of windows, adjust the door/window parameter accordingly. An average paint has a coverage of 12 m² per liter, but paints vary considerably, so it is best to check the can.
Use the unit menus to find the measurement units you are used to.