Paint & Wall Calculators
These paint and wall calculators work out what to buy for your walls at your sizes and your prices.
In this section
- Wall Area Calculator for Paint & WallpaperWork out the wall area of a room from its width, length and height, less doors, windows and other openings, in m² and sq ft.
- Paint CalculatorWork out how many litres or gallons of paint you need from room size, coats and coverage per litre, with wastage and cost at your price.
- Wallpaper CalculatorWork out how many rolls of wallpaper you need from your wall area, roll size and pattern repeat, with a wastage allowance and cost.
- Plaster CalculatorWork out how many bags of plaster you need for your walls from the wall area, plaster thickness and coverage per bag, with a wastage allowance and cost.
How they work
Enter your room sizes, the product figures and your prices. Every quantity is an estimate; the product data sheet wins.
Plan for a little extra
Add 10% to every order to cover offcuts, pattern matching, touch-ups and the odd mistake. A rough surface or a colour change may need more. It is cheaper to buy one extra item than to make a second trip to the shop.
Calculators
- Wall area calculatorWall area from room dimensions, less doors and windows, in m² and sq ft.
- Paint calculatorLitres and gallons of paint for your walls, with a wastage allowance.
- Wallpaper calculatorRolls needed, with pattern repeat and a wastage allowance.
- Plaster calculatorBags of plaster for your walls, from area and bag coverage.
Ready to plan your space?
It is free, runs in your browser and needs no account. Projects are saved privately on this device.