Privacy
These calculators run entirely in your browser. Nothing you type into them is sent to us, stored, or logged.
What we do not collect
- No accounts, no sign-up. There is nothing to register for.
- No form data leaves the page. The purchase price you type is used by JavaScript in your browser and then forgotten when you close the tab.
- No advertising cookies from us. This site sets no cookies of its own.
What the host sees
Like any website, the server that delivers these pages receives a standard request: your IP address, the page you asked for, and your browser's user agent. That is how the page reaches you. We do not use it to build a profile of you.
If you email us, we hold that email so we can reply and, if you have reported a wrong figure, so we can correct the page. We do not add you to a list and we do not pass the address to anyone else.
Changes
If this policy changes, the date at the foot of the page changes with it.
Last updated 22 October 2026.