Privacy policy

This site has no account, sign-up or form: the calculator runs entirely in your browser, and the figures you type never leave your device. Google Analytics 4 does, however, run on every page of the site. Storage for analytics and advertising is denied by default for every visitor, wherever they connect from, and this site has no banner or other mechanism through which that denial could be changed — which is why no analytics or advertising cookie is written and no identifier is stored on your device. Google nevertheless receives, for each page view, the page address, the referrer, an approximate location derived from your IP address, and your device or browser type. There is one exception, and only if you ask for it: the gr_int flag, our own exclusion for internal visits. It is written only when you deliberately open a page with ?internal=1 appended — as a cookie with a lifetime of one year, and additionally in local storage — and the measurement code reads it on every page view. On an ordinary visit nothing is written. It holds a single flag and nothing about you, and you delete it by clearing this site’s data in your browser.