Privacy Policy

What we collect: the calculators run entirely in your browser — the numbers you enter are never sent to our servers or stored anywhere.

Analytics: we use privacy-respecting aggregate analytics to see which pages are useful. No personal profiles are built.

Advertising: this site displays ads served by Google AdSense. Google and its partners may use cookies to serve ads based on prior visits to this or other websites. You can opt out of personalized advertising at Google Ads Settings. Third-party vendors' use of advertising cookies enables ad serving based on your visits to this and other sites.

Contact: privacy questions go to the address on our contact page.

Last updated: October 2026.