Privacy policy
Short version: the calculators run in your browser, nothing you type is sent to us, and the site sets no cookies.
Calculator inputs
Values you enter are processed by JavaScript on your device. When you copy a link "with these numbers", the values are stored after the # in the address. Browsers do not send that part of a URL to the server, so the numbers stay with whoever has the link.
Cookies and analytics
The site sets no cookies and runs no analytics or advertising scripts. If that changes, this page will say so first, and any cookie that is not strictly needed will wait for your consent.
Hosting
Pages are served by Cloudflare. Like any web host, Cloudflare processes your IP address and request details to deliver the page and block attacks; see Cloudflare's own privacy policy for how long it keeps them. We do not receive or store those logs.
If you write to us, we keep your message and address only to reply and, for error reports, to track the fix. We do not add you to any list. Ask at [email protected] and we will delete your messages.
Last updated 2026-11-05.