Last updated 2026-09-29.
What you type stays on your device
The calculators run in your browser. What you pick or type is not sent to us or stored.
Visit counts (Google Analytics)
We use Google Analytics to count visits and see which pages people read, so we know what to improve. It uses cookies and records things like the pages you view, how you arrived, your general location (city level), and your device type. It does not record what you pick or type in a calculator. You can block it with the Google Analytics opt-out add-on or your browser's cookie settings. Learn more at how Google uses data from sites that use its services.
Ads
When ads are turned on, they are served by Google AdSense. Google and its partners may use cookies to show ads based on your visits to this and other sites. You can turn off personalized ads at Google Ad Settings, and learn more at how Google uses cookies in advertising.
Hosting
The site is hosted on Cloudflare, which keeps standard server logs (such as IP addresses) to run and protect the service.