Privacy policy

Last updated: 29 September 2026

What we collect

The calculators run entirely in your browser. The numbers you enter are never sent to our servers or stored by us. If you email us, we keep your message only as long as needed to reply.

Cookies and advertising

This site uses Google AdSense to show ads. Third party vendors, including Google, use cookies to serve ads based on your previous visits to this and other websites. Google's use of advertising cookies enables it and its partners to serve ads to you based on your visits to this site and other sites on the internet.

You can opt out of personalised advertising by visiting Google Ads Settings, or opt out of some third party vendors' use of cookies at aboutads.info. Learn more about how Google uses data from partner sites.

Analytics

We may use privacy friendly analytics to count page views. This data is aggregated and does not identify you personally.

Contact

Questions about this policy can be sent to [email protected].