Privacy Policy

Last updated November 4, 2026.

Information you enter

All calculations run in your browser. We do not collect, send or store the numbers you type into the calculators, and we do not offer accounts.

Server logs

Our hosting provider may keep standard server logs (such as IP address, browser type, referring page and pages visited) for security and performance.

Amazon Associates

Material Math HQ is a participant in the Amazon Services LLC Associates Program. Links to Amazon are affiliate links. If you click one, Amazon may set cookies and collect information under its own privacy policy.

Advertising and cookies

We may show ads from third-party vendors, including Google AdSense. Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this website or other websites. Google’s use of advertising cookies enables it and its partners to serve ads to you based on your visits to this and/or other sites on the Internet. You may opt out of personalized advertising by visiting Google Ads Settings, or opt out of some third-party vendors’ use of cookies for personalized advertising at www.aboutads.info. Learn more about how Google uses information from sites that use its services. We may also use privacy-friendly analytics to understand which pages are useful. You can block or delete cookies in your browser settings.

Children

This site is intended for a general audience and is not directed to children under 13.

Changes and contact

We will update this page if our practices change. Questions: email {{CONTACT_EMAIL}} or see our contact page.