Privacy Policy

Last updated: October 21, 2026.

Calculator data

The calculator runs entirely in your browser. The amounts you enter are never transmitted to us or stored.

Email alerts

If you sign up for an email alert, we use your email address only to send that alert series. We do not sell email addresses. You can unsubscribe at any time.

Advertising and cookies

This site may display advertising served by Google AdSense. Google and its partners may use cookies to serve ads based on your visits to this and other sites. You can opt out of personalized advertising at Google's Ads Settings. We also use privacy-respecting, aggregate analytics to understand which pages are useful.

Contact

Questions about this policy: see our contact page.