Privacy policy

Last updated: 26 October 2026.

What you type

All calculators run in your browser. The numbers you enter are not sent to us or to anyone else.

Stored on your device

The site remembers whether you prefer inches or centimetres, using your browser’s local storage. This stays on your device and you can clear it at any time in your browser settings.

Hosting

The site is hosted on Cloudflare. Like any web host, Cloudflare processes technical data such as IP addresses to deliver pages and protect against abuse. See Cloudflare’s privacy policy.

Cookies, analytics and advertising

The site currently sets no cookies and uses no analytics or advertising. If that changes, for example by adding ads from a third-party network, this policy will be updated before they go live and will explain what those services collect and how to opt out.