Calculate how much paint you need for a wall or room, based on the area to be painted, number of coats, and the paint's coverage rate.
How to Use the Paint Calculator
Enter the "Wall Area (m²)" you plan to paint - use the Wall Area Calculator if you need to work this out from room dimensions.
Enter the "Number of Coats" you plan to apply.
Enter the paint's "Coverage (m² per liter)" per coat - check the paint can's label, as this varies by brand and surface.
Click "Calculate Paint Required" to see how many liters of paint you'll need.
Frequently Asked Questions
Paint Required (liters) = (Wall Area × Number of Coats) ÷ Coverage Per Liter. Each additional coat effectively multiplies the area you need to cover.
Coverage rate is usually printed on the paint can label, often expressed as sq.ft or sq.m per liter. It varies by paint type (emulsion, enamel, primer) and surface texture - rougher surfaces absorb more paint and reduce effective coverage.
It's a good idea to round up to the nearest available can size and keep a small surplus for touch-ups later, since matching the exact paint batch/shade later can be difficult.
Yes, it's completely free and requires no sign-up.