Privacy policy

Calculations run in your browser. The numbers you enter are not sent to or stored on our servers. When you use “Copy link”, your inputs are placed in the page URL so you can share them — anyone with the link can see those inputs.

Our hosting provider (Cloudflare) may process standard request data such as IP address and user agent for security and performance. We may use privacy-friendly aggregate analytics and, in future, advertising; if so this page will be updated to list the providers and any cookies they set.

Last updated September 24, 2026.