Worldwide paint coverage calculator
Estimate paint or render quantities from surface area, coats and coverage rate - with a real colour palette bar and a tin recommendation for every colour in the job, not just one combined total.
The colourful Calculator tab, the Coverage Guide reference table, and dark mode.
Light mode - a whole-house job across ten paint colours
The Coverage Guide tab - every paint/render type at a glance
Dark mode - the same colour palette bar and tin totals
Pick an actual colour swatch for every surface, not just a paint type - the whole app reflects your real palette back at you, not a generic accent colour.
The job total renders as a proportional bar, one segment per colour, filled with your actual chosen swatches - see the whole job's palette at a glance.
Each colour gets its own tin combination from four standard sizes (1L to 10L) - because in practice you buy tins per colour, not one pile for the whole job.
Matt and silk emulsion, undercoat, gloss, masonry paint, render and primer - each with its own typical coverage rate, browsable in a dedicated Coverage Guide tab.
Enter areas in m² or ft² and read totals in litres or gallons - the whole job recalculates instantly when you switch.
An editable wastage percentage covers offcuts and spillage. Copy a plain-text summary or export the whole job as a standalone HTML file. Light/dark theme remembers your choice.
Dulux Trade Paint Expert is a well-known free app UK decorators already have on their phone. It's tied to Dulux's own product range - here's how a manufacturer-neutral, offline desktop tool compares.
| Feature | Paint Coverage Calculator | Dulux Trade Paint Expert |
|---|---|---|
| Pricing model | One-off purchase after a free trial | Free app |
| Works fully offline | ✓ | ~ |
| Any paint or render brand/type, not one manufacturer | ✓ | ✕ |
| Tin recommendation per individual surface colour | ✓ | ~ |
| Colour matching via camera/AR | ✕ | ✓ |
| Product datasheets & stockist finder | ✕ | ✓ |
| Seven paint/render types, including render not just paint | ✓ | ✕ |
| Requires an account/sign-in | ✕ | ✓ |
Comparison based on Dulux Trade Paint Expert's publicly listed features as of August 2026 (apps.apple.com, play.google.com, duluxdecoratorcentre.co.uk) - features change over time, so check duluxtradepaintexpert.co.uk for current details. Dulux is a trademark of its respective owner; this comparison is for informational purposes and isn't sponsored by or affiliated with Dulux or AkzoNobel.
Ten surfaces across inside and out, each with its own colour and paint type, so the answer comes back as tins to buy per colour rather than one meaningless total.
Coverage rates differ by paint type (masonry paint on render goes a lot less far than emulsion on a smooth wall), so the paint-type column matters as much as the area. The app rounds each colour up into the tin sizes actually sold instead of leaving you with "4.77 litres". Open the browser edition to try it with your own figures.
No - use it straight from your browser, on a phone, tablet or PC, with no sign-up. It works offline once it has loaded, and you can add it to your home screen or desktop like an app. There is also a Windows desktop version in the Microsoft Store if you prefer an installed app.
Yes - there's a single Metre2 account behind Paint Coverage Calculator, Vector, Forma and the rest of Keystone. Sign in once, use it everywhere.
No - it's an approximate sizing guide based on commonly-used paint and render coverage rates, not a guarantee of exact quantities. Actual coverage varies by surface texture, porosity, application method and product batch - always check the manufacturer's stated coverage rate on the tin before buying.
Yes - every surface gets its own colour swatch, and the app breaks the total down colour by colour, with its own tin recommendation for each one, since in practice you buy tins per colour rather than one combined pile for the whole job.