Privacy policy

Last updated: October 19, 2026.

Your calculations

The calculator runs in your browser. The numbers you type are not sent to our servers. When you copy a link to a result, the numbers are stored in that link, so anyone you share it with can see them.

Analytics

We may use privacy-friendly analytics that do not use cookies and do not identify you, to count visits and see which pages are useful.

Advertising

This site may show ads from Google and its partners. Google uses cookies to serve ads based on your visits to this and other websites. You can opt out of personalized advertising at Google Ads Settings, and learn more at How Google uses information from sites that use its services. Visitors from the European Economic Area, the UK and Switzerland will be asked for consent before personalized ads are shown.

Contact

Questions about privacy: contact@otdmath.com.