Privacy policy
Last updated September 30, 2026.
What we collect
Calculators run in your browser. The numbers you type are not sent to us. They are kept only in the page address, so you can share a link if you choose.
We use Cloudflare Web Analytics to count visits. It does not use cookies or track you across sites. Your browser may store your light or dark theme choice on your device.
If you email us, we use your message and address only to reply.
Changes
If we add advertising or other services later, we'll update this page and ask for consent where the law requires it.