Paint Calculator
Work out how much paint you need from the wall area and number of coats.
Buying the right amount of paint
Buying paint is a balance — too little and you are back at the shop mid-job with a slightly different batch, too much and you have wasted money and tins to store. This works out how much you need from your wall area and the number of coats, so you buy about the right amount in one trip.
Enter the area and coats to see the paint required.
Coats, coverage and the things you don't paint
A few real-world factors shape the figure. Most walls need two coats for an even finish, and a strong colour change or a fresh, unpainted surface can need more. Paint coverage per litre varies by product and by how porous the surface is — bare plaster drinks the first coat. And you can subtract large windows and doors from the area, though it is wise to keep a little margin for touch-ups.
Frequently asked questions
How many coats should I plan for?
Usually two for an even finish. A big colour change or a fresh, porous surface can need more.
Why does coverage vary?
It depends on the paint and the surface — bare plaster absorbs more, so the first coat covers less area than a sealed wall.
Is anything uploaded?
No. The calculation happens in your browser.