Paint Calculator

How paint coverage is calculated

Paint requirements depend on the surface area and the paint's coverage rate, meaning how many square metres one litre covers. Multiply the area by the number of coats and divide by the coverage rate to get the litres you need.

Most surfaces need two coats for an even finish, so plan for roughly double the volume of a single coat.

What the calculator shows

You get an estimate of the paint volume required and the total cost of the job. This makes it easy to see how many tins to buy and where the project lands in your budget.

Who it's for

The calculator is handy for home renovators, landlords and anyone planning to paint walls, ceilings or a facade. It helps you avoid both running out of paint mid-job and buying far too much.

Tips for a sharper estimate

Check the coverage rate printed on your chosen paint tin, as it varies by product and surface. A rough, absorbent or previously unpainted surface uses more paint than a smooth, already-treated one.

Subtract the area of doors and windows from the total if you want a more precise figure.