Calculator inputs
Dates, grade group and calculator choices are processed in your browser. The current version does not require a user account.
Technical hosting data
The hosting provider may process ordinary request information such as IP address and request metadata for security and service operation.
Cookies and advertising
The calculator itself does not need non-essential cookies. If advertising or analytics technologies requiring consent are enabled, this policy and the consent flow must reflect them.
If you contact us, the message is used to respond or review a correction. Do not send student records or sensitive information.
Last updated: 27 September 2026.