Privacy policy

Last updated 5 October 2026.

Your calculator inputs

Every calculation happens in your web browser. The numbers you type into our calculators are never sent to our servers or stored by us.

Hosting and analytics

The site is hosted by Cloudflare, which processes standard technical data such as IP addresses to deliver pages and protect against abuse. We may use privacy-friendly, cookie-free analytics to count page views. These do not track you across other websites.

Advertising and affiliate links

We may show adverts served by Google AdSense. Google and its partners may use cookies to serve ads based on your previous visits to this and other websites. You can opt out of personalised advertising at Google Ads Settings. Where required, we will ask for your consent before any non-essential cookies are set.

Some links on this site are affiliate links. If you click one, the destination site may set a cookie so it can credit us if you sign up or buy something. Their own privacy policies apply.

Your rights

Because we do not collect personal information through our calculators, we generally hold no personal data about you. If you have questions about privacy, you can contact the relevant third party (Cloudflare or Google) or the UK Information Commissioner's Office at ico.org.uk.