The site

Privacy

What this site knows about you, and what it does not do with it.

This site asks for no account and collects no personal data directly. The calculators run entirely in your browser: the dimensions you type are sent nowhere.

Audience measurement

With your consent, Google Analytics 4 measures page traffic. Without consent, no measurement cookie is set; Google only receives cookieless signals used to estimate traffic. Your choice is kept for 6 months and can be changed at any time with the “Cookie settings” link at the bottom of the page. We sell no data.

Clicks to merchants

When you click a link to a merchant, our server records the page, the merchant and the position of the link, with no cookie, no IP address and no identifier: these anonymous counts tell us which content is useful. They are kept for 13 months.

Outbound links

When you follow a link to Amazon, Amazon applies its own tracking and cookie rules, which we do not control. Its privacy policy applies from the moment you leave this site.