CalculaThor - Online toolbox

Open any of CalculaThor's free calculators and everyday tools in one click, right from your browser toolbar.

CalculaThor gives you access to more than 40 free calculators and tools without leaving the page you are on. Click the ⚡ icon in your toolbar, type a few letters, and the tool you need opens on www.calculathor.fr. No more searching for the right website every time you need to work something out. ✨ What the extension does • It shows the full list of CalculaThor tools, sorted and easy to browse. • It finds a tool from just a few letters. • It keeps your favorite tools at the top of the list and syncs them across your Chrome browsers. • It comes in a dark or a light theme, whichever you prefer. • It automatically follows your browser's language (English, French, Spanish, Polish or Portuguese). 🧭 A few examples You are writing an invoice and need to add VAT to a price. You want to know how many working days are left before your holiday. You need a QR code for a poster, or a lighter image for your website. Each time, the right tool is one click away. 🔒 Privacy The extension collects no data and shows no ads. It asks for a single permission, storage, to remember your favorites and your theme. Free, no account, no sign-up.