Privacy Policy

Last updated: 30 June 2026

Calculator data

Numbers you enter into any calculator on this site stay in your browser. They are not sent to or stored on our servers.

Cookies and advertising

This site uses Google AdSense to display advertising. On your first visit, you'll see a banner asking whether you're happy for us to use advertising and analytics cookies. Nothing is set until you choose, and you can change your mind at any time by clearing your browser's cookies for this site and reloading the page.

If you accept, Google and its partners may use cookies or similar technologies to serve ads based on your visits to this and other websites. You can also opt out of personalised advertising generally by visiting Google's Ads Settings at adssettings.google.com.

Analytics

We use Google Analytics to understand how visitors use this site in aggregate. This data is anonymised and not used to identify individual visitors.

Contact

Questions about this policy can be sent via the contact details on the About page.