Privacy Policy

This policy explains what information is collected when you use CalcTools and how it is used. Last updated: 5 October 2026.

Calculations stay on your device

Every calculator runs in your web browser. The numbers you enter are processed on your own device and are not sent to us or stored by us.

Information collected automatically

Like most websites, our hosting provider records standard technical information such as your IP address, browser type, the pages you visit and the time of the visit. We use this information only to keep the site secure and working, and to understand which pages are useful.

Cookies and advertising

We may show advertising provided by Google AdSense to keep the site free. 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 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.
• You can learn more about how Google uses information from sites that use its services at policies.google.com/technologies/partner-sites.
• Visitors in the European Economic Area, the United Kingdom and Switzerland are asked for consent before personalised ads are shown.

You can also block or delete cookies in your browser settings. The calculators keep working without cookies.

Children

This site is intended for a general audience and does not knowingly collect personal information from children.

Links to other websites

Pages may link to sources such as health organisations or standards bodies. We are not responsible for the privacy practices of those sites.

Changes and contact

We may update this policy and will change the date above when we do. Questions about privacy can be sent to [email protected].