Contact
Help improve the tools.
Calculation corrections, accessibility issues, feature ideas, and educational resource suggestions are all useful feedback.
Have a correction or a question?
I read every message myself and reply directly.
Email gradercalculator@gmail.comWhat to include
Reporting a calculation issue
Include the calculator URL, the exact inputs you used, the result you received, and the result you expected.
Requesting a feature
Briefly describe the task you are trying to solve, and which existing calculator comes closest.
Flagging a content error
Link the specific guide or page, and quote the exact sentence or number you believe is wrong.
General questions
Ask directly. Most replies go out within a few days.
Privacy first. Do not send sensitive student records, account passwords, or personally identifying academic information.