Use this calculator to turn measured wall or ceiling area into a paint quantity based on the product coverage you plan to use.
Inputs
This topic also has a deeper guide and a printable reference pack, so you can move from the live answer into the method, assumptions, and worked examples without leaving the topic cluster.
A stronger finishing guide for paint, tiles, flooring, wallpaper, and sheet coverage, built around practical waste, cuts, pack rounding, and layout reality.
A concise room-measurement sheet covering area take-off, opening adjustments, and the handoff from geometry to coverage products such as paint, tiles, flooring, wallpaper, and sheet goods.
These are the main values the calculator uses. Keep the units consistent and, where relevant, match the assumptions explained in the related guide.
Unit: m^2
Enter the surface area that will actually be painted after subtracting openings if appropriate.
Unit: m^2/L
Use the product coverage rate you expect for the paint and surface condition.
Set the number of coats planned so the total painted area is realistic.
Use this page when you already know the paintable area and the manufacturer coverage rate and want a practical litres estimate.
The main result is the paint quantity in litres. The supporting value shows the total coated area after the selected number of coats is applied.
If the paintable area is 60 square metres, the coverage is 10 square metres per litre, and you plan two coats, the calculator works from 120 square metres of total coated area.
This page depends on the coverage rate you enter. Surface texture, porosity, wastage, and cutting-in can all increase the real amount of paint needed.
Often yes. Many people add a small margin for wastage, touch-ups, absorbent surfaces, or colour changes that need extra coats.
Use the Room Area Calculator to estimate room area from measured dimensions, coverage rates, or material sizes.
Use the Wallpaper Rolls Calculator to estimate wallpaper rolls from measured dimensions, coverage rates, or material sizes.
Estimate the number of tiles needed from the area to cover, the tile coverage, and your waste allowance.
Use the Flooring Boxes Calculator to estimate flooring boxes from measured dimensions, coverage rates, or material sizes.