Free Paint Calculator

Enter the room size to see the wall area and how much paint to buy.

UnitsRoom length (m / ft)Room width (m / ft)Wall height (m / ft)DoorsWindowsPaint the ceiling tooCoatsCoverage per litre or gallon (m² / ft²)

Doors and windows are taken off at typical sizes. Buy a little extra for touch-ups.

Results

Area to paint–

Paint needed–

How to make a paint estimate

Choose metric or imperial and enter the room’s length, width and wall height.
Enter the number of doors and windows, the coats and the coverage printed on the tin.
Read the area to paint and the paint you need.

Frequently asked questions

What coverage should I use?: Check the tin. Most wall paints cover about 10–12 m² per litre (350–400 ft² per gallon) per coat; rough or porous walls need more.
Is my data stored?: No. Everything happens in your browser and your inputs are saved only on this device.