Cookies

Cookies right now

This site sets no advertising cookies, and on an ordinary visit no cookie of its own — with one exception, described below rather than passed over in silence: the gr_int flag, which is written only if you deliberately open a page with ?internal=1 appended. It does load Google Analytics 4 (measurement id G-HJJ2HZ9W3H) to count visits. Consent for analytics storage is denied by default for every visitor, in every country, and there is no banner that can change that — so the tag never writes an analytics cookie and never stores an identifier on your device.

What Google receives

With analytics storage denied the measurement runs cookieless: Google receives aggregated pings carrying the page address, the referring page, an approximate location derived from your IP address, and your device and browser type. Nothing you type into the calculator is part of that — it runs in your browser and is never sent anywhere.

Excluding our own visits

One exception, named here rather than passed over in silence: on every page view the measurement code checks whether the gr_int flag is present in your browser. That is our own exclusion for internal visits, so that our test traffic does not end up in the figures. It is written only when a page is opened with ?internal=1 appended — as a cookie with a lifetime of one year, and additionally in local storage. Without that, nothing is written, and nothing on this site links to it. It holds a single flag and nothing about you. You delete it by clearing this site’s data in your browser.

Your choices

You can block or clear anything Google stores through your browser settings, and browser-level tracking protection or an ad blocker stops the tag loading at all. If advertising is ever introduced, this page will list each cookie, its purpose and its lifetime before it is set.

Last updated: aug 2026.