Work out how much paint you need for a room. Enter your wall measurements, the number of coats and the paint coverage to get the litres required.
Coverage figures are printed on the paint tin. Rough or textured walls may need up to 20% more paint.
How to Use
- Enter the length and height of one wall in metres.
- Enter how many walls you are painting.
- Set the number of coats and the coverage from your paint tin (m2 per litre).
- Press Calculate paint.
- Read the litres needed and the suggested number of 5-litre tins.
Key Features
- Any room size — works from a single feature wall to a whole house.
- Coats included — totals primer and top coats together.
- Real tin guidance — converts litres into 5-litre tins to buy.
- Custom coverage — use the exact figure from your paint brand.
- 100% private — runs entirely in your browser; nothing is sent or stored.
FAQs
Where do I find the coverage figure?
It is printed on the paint tin or the manufacturer’s website, usually stated as m2 per litre per coat.
Should I buy extra paint?
It is wise to round up and keep a little spare for touch-ups. Rough, textured or unpainted plaster walls can need up to 20% more.
Does this include ceilings?
No — measure ceilings separately and run the calculation again, or add the ceiling area to your wall total first.
What about doors and windows?
For a closer estimate, subtract roughly 2 m2 per door and 1.5 m2 per window from your wall area before calculating.
Is my data sent anywhere?
No. The calculation runs entirely in your browser and never transmits or saves your entries.
Related Tools
Try these related tools: Area Calculator, Volume Calculator and Unit Converter.