ffee
All tools
Paint Calculator
Work out the painted area of a room and the litres and cans of paint your coats will need.
Paint calculator
Wall area: — · Painted area: —
Paint per coat: — · Total paint: —
Cans needed: —
—
How to use the Paint Calculator
- Enter the room length, width and wall height in metres.
- Set the coats, coverage per litre, can size, doors and windows.
- Tick the ceiling and trim boxes, then read the litres and cans needed.
Features
- Wall area less doors and windows
- Coverage, coats and litres needed
- Ceiling and trim options
- Number of cans at your can size
Advertisement
Frequently Asked Questions
Common questions about the free online paint calculator.
Work out the wall area, take off doors and windows, then divide by the coverage on the tin
and multiply by the number of coats.
Add the room length and width, double it to get the perimeter, then multiply that by the wall
height.
This calculator deducts 1.8 square metres for each door and 1.5 square metres for each
window.
Two coats suit most walls. One coat may do when you are refreshing the same colour over a
sound surface.
Most emulsion covers 10 to 14 square metres per litre, so check the tin because thick or
textured paint covers less.
Ceilings are usually painted in a flat white, and including the ceiling in the estimate adds
the floor area to your total.
Trim takes far less paint than walls. This tool estimates skirting from the perimeter and
adds a little for the frames.
A spare tin keeps the colour consistent for touch ups, and paint keeps for years if the tin
is sealed well.
No. The paint estimate is calculated in your browser and nothing you enter is sent to a
server.
Yes. It is completely free, needs no account and you can price up as many rooms as you like.
Last updated: October 10, 2026