Privacy Policy

We use Google Analytics to understand how visitors find and use this website. It sets cookies that collect non-identifiable information such as your browser type, device, approximate location, referring page, and the pages you visit. We use this only in aggregate to decide which calculators to build and improve.

A cookie is a small text file stored by your browser. You can block or delete cookies through your browser settings at any time. Doing so will not affect any calculator on this site, because all calculations run locally in your browser and do not depend on cookies.

We also store your theme preference and your recent calculation history in your browser's local storage. That data stays on your device, is never transmitted to us, and is cleared when you clear your browser data.

This site is free to use and is funded by advertising. We use Google AdSense to display adverts.

• Third-party vendors, including Google, use cookies to serve adverts based on your prior visits to this website or other websites.
• Google's use of advertising cookies enables it and its partners to serve adverts to you based on your visit to this site and other sites on the internet.
• You may opt out of personalised advertising by visiting Google Ads Settings.
• You can opt out of a third-party vendor's use of cookies for personalised advertising at aboutads.info or Your Online Choices in the EU.
• Advertisers never receive the values you type into any calculator on this site, because those values are never sent off your device.

For more information on how Google uses data when you use our partners' sites, see Google's privacy and terms.

If you are in the European Economic Area or the United Kingdom, the GDPR gives you the right to access, correct, or erase personal data held about you, to object to processing, and to lodge a complaint with your data protection authority. Because we do not operate accounts and do not collect names, email addresses, or calculation data, the only data associated with your visit is the cookie and analytics data described above, which you can remove by clearing your browser data.

If you are a California resident, the CCPA gives you the right to know what personal information is collected and to opt out of its sale. We do not sell personal information. Advertising cookies may be treated as a sale or share under some interpretations, and the opt-out links in the Advertising section above let you disable personalised advertising.

This site is not directed at children under 13, and we do not knowingly collect personal information from them.