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Paint calculator

Estimate how many liters of paint a wall needs from its size, door and window openings, coats, and the coverage rate on the can.

Enter the wall to size the tin.

This is one flat wall, not a room: measure each wall you plan to paint and add the results. The estimate is the geometric minimum, so real jobs use more. Rough or fresh plaster drinks paint past the can's figure, dark switchovers need an extra coat, and a litre held back for touch-ups is cheap insurance. The coverage number on the can assumes an even roll on a sealed surface.
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