Privacy policy

Last updated 25 October 2026.

The calculator

Everything you type is worked out in your browser. Your figures aren't sent to us or stored anywhere. If you copy a share link, the figures are in that link, so anyone you send it to can see them.

Cookies and analytics

The site sets no cookies. The site is hosted on Cloudflare, which processes basic request data such as IP addresses to deliver pages and protect against abuse. See Cloudflare's privacy policy.

If we add advertising or analytics later, this page will be updated first and you'll be asked for consent where the law requires it.

Your rights

Under UK GDPR you can ask what personal data we hold about you. We don't hold any from the calculator. You can also complain to the Information Commissioner's Office.