Privacy

Your calculations

The calculator runs in your browser. Form entries and results remain in page memory and are not submitted to us. There is no account or registration.

Usage measurement

Google Analytics measures page visits, interface interactions and successful calculations. We do not send your form entries or calculated results. A local activity timestamp and completion flag help avoid counting repeated results. After 30 minutes without activity, the next use starts a new counting session and replaces the flag; it is not automatically deleted at 30 minutes. Google Analytics may use cookies and process device and approximate location information. Do Not Track and Global Privacy Control disable this measurement. You can also add ?qa=1 to the address to disable analytics.

Website requests

The hosting provider may process ordinary request information, such as an IP address and browser details, to serve the website. This is separate from the information you enter into the calculator.

External links and email

Other websites have their own privacy practices. If you email us, your email provider and ours process that message. Privacy questions: jhtgwij@gmail.com.