Privacy Policy

Last updated 2026-10-16

What the calculators do with your numbers

All calculations run in your browser. The values you type are not sent to us or stored anywhere.

Analytics

We use Cloudflare Web Analytics to count visits and see which pages are popular. It does not use cookies, does not track you across sites, and does not collect personal data. Our host, Cloudflare, also keeps standard server logs (such as IP address and browser type) for security, as described in Cloudflare's privacy policy.

Advertising

We may show ads from Google AdSense to keep the tools free. Google and its partners use cookies to serve ads based on your visits to this and other sites. You can opt out of personalised advertising at Google Ads Settings, and learn more in how Google uses data from sites that use its services. Visitors in the EEA, UK and Switzerland are asked for consent before any advertising cookies are set.

Affiliate links

Some pages may link to products we recommend. If you buy through such a link we may earn a commission at no extra cost to you. Affiliate links are labelled.

Your rights

Because we don't collect personal data ourselves, there is usually nothing for us to access or delete. If you have a question about your data, email hello@bookmathtools.com.