Privacy Policy

Last updated: 23 August 2026

What we collect

The calculators on this site run in your browser. The numbers you type into them are not sent to our servers, stored, or shared — calculations happen entirely on your device.

Like most websites, our server keeps standard access logs (IP address, browser type, pages requested) for security and operations, retained for a limited period.

Analytics

We use privacy-respecting, aggregate analytics to understand which tools are used. When you interact with a calculator we record only which tool was used, when, and the country the request came from (derived from network headers) — never the values you typed, your IP address, or anything that identifies you. Analytics data is not used to identify individuals.

Advertising and cookies

This site may display advertising, including Google AdSense. Third-party vendors, including Google, use cookies to serve ads based on prior visits to this or other websites. Google's use of advertising cookies enables it and its partners to serve ads based on your visits to this and other sites. You may opt out of personalised advertising at Google Ads Settings, and learn how Google uses data at policies.google.com/technologies/partner-sites. Visitors in the EEA/UK are shown a consent notice before any advertising cookies are set.

Affiliate links

Some pages contain affiliate links, marked as such. Clicking one may set a cookie from the partner so they can attribute a signup; we receive no personal information about you from partners.

Your rights

You may request access to or deletion of any personal data we hold (in practice: server logs) by contacting us. EEA/UK visitors have the rights set out in the GDPR, including complaint to a supervisory authority.