Privacy policy

Calculator inputs are processed in your browser and are not submitted to our server. We do not include analytics or advertising trackers in this site package.

The hosting provider may keep standard server access logs, including IP address, request path and browser information. Administrator sign-in uses an essential session cookie and stores hashed passwords. Failed administrator sign-in attempts are rate-limited using a hashed IP address. Public calculator users do not need an account.

External websites have their own privacy policies. If analytics, advertising or other integrations are added, this policy must be updated before those services are enabled.