Paint calculator

Estimate how much paint a room needs from its dimensions, openings, coats, and coverage rate.

How do you want to measure?

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Deductions use 1.9 m² per door and 1.5 m² per window. Coverage defaults to 10 m²/L — check your can's label. Buying rounds up to whole cans.

How to use

  1. Enter room length, width, and height.
  2. Set doors, windows, coats, and coverage.
  3. Read litres, cans, and optional cost.

What it supports

Walls plus optional ceiling; doors and windows are deducted at fixed typical sizes (1.9 m² and 1.5 m²). Coverage is litres per m² per coat — check the paint can, since textured surfaces and dark-over-light changes can raise real usage.

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