Privacy

We do not ask who you are, we do not use cookies, and we do not track you.

Last updated 13 November 2026.

Who is responsible

Youell Systems Ltd publishes DIY Calculators and is responsible for this notice. Contact us at max@youellsystems.co.uk, or write to 18 Albert Road, Clayton West, Huddersfield HD8 9NL.

What you type into a calculator

The calculators work in your browser. The numbers you enter are not sent to us.

Your answers are added to the address in your browser's address bar, so you can bookmark a result or send it to someone. Anyone you share that link with will see the numbers in it.

Cookies

We do not set cookies. We do not use advertising scripts. Our typefaces are served from our own site, not from another company's.

Our host

The site is served by Cloudflare. Like any website host, Cloudflare handles your IP address and the details of each request to deliver pages and protect the site from attacks. Cloudflare explains this in its privacy policy.

If you email us

We use what you send only to reply and, if you report a mistake, to fix it. We keep emails no longer than we need to.

Your rights

You can ask what information we hold about you, and ask us to correct or delete it. Email us to do that. If you are unhappy with how we handle your information, you can complain to the Information Commissioner's Office.

Changes

If we start doing anything new with information, we will change this page first and update the date at the top.