Privacy

This site is a set of static pages. The calculators run entirely in the browser: the numbers entered are not sent to a server, stored or logged.

What is collected

• Google Analytics 4 counts visits: pages viewed, approximate location, device and browser type, how the visitor arrived, and clicks on links to other sites. It sets its own cookies, and IP addresses are anonymized. The numbers typed into the calculators are never sent to it. Google's browser add-on at tools.google.com/dlpage/gaoptout turns it off.
• No accounts, forms or advertising.
• One optional browser setting: choosing a light or dark theme stores that choice in the browser's local storage on the device. It never leaves the device and can be cleared at any time.
• The hosting provider may keep standard server logs (such as IP address, time and page requested) for security and reliability, as nearly all web hosts do. Those logs are not used to profile visitors.

Fonts and third parties

Fonts are served from this site. The only third-party script is Google Analytics, described above.

Changes

If anything else is collected later, this page will be updated before it goes live and will say exactly what is collected.