Privacy policy

Last updated November 8, 2026.

The calculator runs entirely in your browser; we do not collect what you type into it.

We may use privacy-friendly analytics to count page visits. We may show ads from Google and its partners. Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this and other websites. Google's use of advertising cookies enables it and its partners to serve ads based on your visits. You can opt out of personalized advertising at Google Ads Settings or aboutads.info.

Some links may be affiliate links; if you buy through them we may earn a commission at no extra cost to you.

Questions: see our contact page.