Privacy Policy
Last updated January 2026.
The short version
Every calculator on this site runs in your browser. The numbers you type are never sent to a server, never stored, and never shared. We built these tools to be a fast reference, and that means keeping them simple and private.
Information we collect
We do not require accounts and do not collect personal information through the calculators. If you contact us, we receive the name, email, and message you choose to send so we can reply.
Analytics & cookies
We may use privacy-respecting, aggregate analytics to understand which tools are used most. These do not identify you personally. Any essential cookies are limited to keeping the site working.
Third parties
We do not sell or rent your information. Any third-party services we use (such as hosting) are bound by their own privacy terms and only process what is needed to serve the site.
Changes
We may update this policy as the site evolves. Material changes will be reflected in the "last updated" date above.
Contact
Questions about privacy? Reach us through the contact page.