⭐ Three tools are free — the whole thing, no email, no account. Try one now, no download →
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Paint Calculator

“How much paint do I need for this room?”

Everyone does this the same way: guess, buy too much, and leave half a tin in the garage forever. Three measurements and this tells you exactly which tins to put in the trolley — including when two gallons and a quart beats three gallons.

  • Exact tins to buy, not just a number of litres
  • Mixes tin sizes to find the cheapest combination
  • Takes off the doors and windows you are not painting
  • Feet and gallons or metres and litres, your choice
  • A printable shopping list with the cost on it
Builtgoing on sale shortly
Tell me when I can buy it
  • This one is finished and tested — not on the build list
  • It will be $9, same as every other tool
  • One email when it goes up, no list, no spam
How it works

Three steps, then you're done

Measure the room

Length, width, height. Round up — it need not be exact.

Pick the paint

Coats, coverage off the tin, and the price.

Take the list to the shop

Exactly what to buy, and what it costs.

Nothing you type ever leaves your computer. There is no account, no login and no server. Switch your wi-fi off and it still works — that's not a promise about our policy, it's just how the tool is built.

Questions

Do I need to install anything?

No. Each tool is a single file. Double-click it and it opens in Chrome, Edge, Safari or Firefox — whichever you already have. No account, no password, no software.

Does anything get uploaded?

No. Your numbers and files never leave your computer — the tools have no way to send them and no internet connection is needed to run them. You can switch your wi-fi off and they still work.

I'm not good with computers. Is this too hard?

The first thing every tool does is walk you through it in five short screens with pictures. Then there's a button that fills it with example numbers so you can watch it work before touching anything.

Will it work on my phone?

Yes. Email yourself the file and open the attachment, or drop the files in iCloud Drive, Dropbox or Google Drive and open them from there — then they're on every device you own.

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