Cookies

Cookies we set

None. Nothing on this site sets a cookie of its own, for preferences, for measurement, or for anything else.

Cloudflare Web Analytics

Cloudflare Web Analytics — sets no cookie and writes nothing to your device; counts page views only. There is no page-view counter of our own, no session recording, no heatmap and no A/B test.

Google’s advertising cookies

This site carries advertising served by Google AdSense. Google and its advertising partners use cookies, or similar identifiers, to serve and measure ads, which can include ads based on your previous visits to this or other websites. Google lists the cookies it and its partners use for advertising at business.safety.google/adscookies.

You can turn off personalised advertising at Google Ads Settings, and opt out of participating vendors individually at aboutads.info/choices. Blocking cookies, or using an ad blocker, does not break anything here: every calculator works exactly the same way with the advertising blocked.

What we store on your device

One key, displayscale:unit, holds whether you prefer centimetres or inches. It is not a cookie — it never leaves your browser, is never attached to a network request, and clearing your browser’s site data removes it. The site works exactly the same with storage blocked; it simply asks your preference again next time.

More information

See the privacy policy for the full picture. If this policy changes, the date at the top changes with it.