Materio

How much paint for a room

Wall and ceiling area, openings deducted, converted into whole tins with an allowance for the second coat.

Step by step

  1. Measure the room: length, width and height. Perimeter times height gives the wall area, length times width gives the ceiling.
  2. Deduct windows and doors. A typical window is about 1.5 m², a typical door about 1.8 m².
  3. Divide by the coverage printed on the tin and multiply by the number of coats. Round up to whole tins.

Calculators used in this guide

Paint, plaster, primer
Tip

The coverage on the label assumes a smooth, primed surface. Absorbent plaster drinks more paint, so allow extra or prime first.

All guides

The same formula in the app Materio for Android uses the same engine offline — with the material catalogue and results saved into a project. Download