About Tantoo

Tantoo is a free set of tools for the everyday numbers that come up around a house, a kitchen and a trip. Conversions, sizes, material quantities, running costs and the practical details of a country you are visiting. It is made by Third Coffee Studio Ltd, a small independent UK company registered in England and Wales, company number 17517422.

It exists because these answers are scattered. Each one lives on its own single-purpose site, usually heavy with pop-ups and consent boxes, and the number you actually wanted is buried somewhere under an article you did not ask for. You wanted to know what a cup of flour weighs, and instead you got the history of baking. Tantoo gathers the common ones in one place, gives the answer first, and puts the explanation underneath for the times you want it.

Three things shape how it is built. The answer comes first, at the top of the screen, before any reading. Everything is worked out in your browser, and anything you save stays on your own device, where you can export it or delete it whenever you like. And the tools are meant to be used in the moment, in a shop or a kitchen, so the site works offline after your first visit and is available in eight languages.

Tantoo is paid for by advertising rather than subscriptions. There is no account, no paid tier and nothing held back, and we would rather keep it that way than charge for a conversion. If you run a site of your own, the converters can be embedded in your pages. We also make Codeshed at codeshed.app, a free tool for QR codes and barcodes.

If a figure looks wrong or a tool is missing something, please tell us at tantoo@thirdcoffeestudio.com. Privacy questions go to privacy@thirdcoffeestudio.com.

Tantoo is a trading name of Third Coffee Studio Ltd, registered in England and Wales, company number 17517422.