Privacy

What is collected. Nothing, unless you use the contact form. The calculator runs entirely in your browser: what you enter is not sent to this site, and it is not stored anywhere.

Contact form. The email address and message you enter go to Formspree, a third-party form processor, which forwards them to the publisher by email. They are used only to answer you and are deleted once the exchange is complete.

Hosting and analytics. The site is served by Cloudflare, which processes request data, including IP addresses, to deliver pages and protect the service, and which adds a cookie-less Web Analytics beacon that counts page loads without identifying you. This site does not track you across other sites and does not respond to Do Not Track signals, because there is nothing to switch off.

Cookies. This site sets no cookies. Following a link to a provider takes you to its site, which may set its own cookies under its own privacy policy.

Your rights. To ask what is held about you, or to have it deleted, use the contact form. Unless you have written in, nothing about you is held. Whether any provider link earns this site a fee is on the disclosure page, and the terms cover what this site is not.

Last reviewed: September 2026