Privacy Policy

This policy explains what Calculix collects and what it does not.

What we do not collect

The numbers you type into a calculator are processed to produce your result and are never stored, logged or linked to you. We do not require an account and we do not ask for personal or financial identifiers.

What we do collect

We record anonymous usage statistics: which page was viewed, which calculator was used, device type and browser. Your IP address is never stored — it is converted into a salted hash that rotates daily and cannot be reversed to identify you.

Advertising

This site is funded by advertising. Third-party ad networks, including Google AdSense, may use cookies to serve ads based on your prior visits to this and other websites. Google's use of advertising cookies enables it and its partners to serve ads based on your visits. You can opt out of personalised advertising by visiting Google's Ads Settings.

Cookies

We use a session cookie to keep the site working and a local preference for your light or dark theme choice. Advertising partners set their own cookies under their own policies.

Your rights

Because we hold no personal data tied to you, there is nothing to export or delete. If you believe otherwise, contact us and we will investigate.

Changes

We will update this page if our practices change, and the revision date will change with it.