Privacy

The short version: your numbers stay in your browser, we don’t use cookies, and we don’t sell or share personal data.

Your calculations

Every calculation runs in your browser. The numbers you type are not sent to our server. When you copy a link, the numbers are placed after the “#” in the address, a part browsers never send to servers.

Stored on your device

Your recent calculations and your decimal-places setting are saved in your browser’s local storage, so they are there next time. They never leave your device. Clear them from the History option in the ⋯ menu, or by clearing your browser’s site data.

Visit statistics

We count visits with Cloudflare Web Analytics, which does not use cookies or fingerprinting and only reports aggregated numbers such as page views and countries.

Ratings

If you rate a calculator, we store only the page and the number of stars. We don’t store who sent it.

Contact

Questions about privacy: [email protected].

Updated October 2026