Contact us
We read every message, and a clear bug report or a suggestion for a new calculator is always welcome.
What to include
- For a wrong answer, tell us which calculator, the exact numbers you entered and what you expected. That lets us reproduce it quickly.
- For a suggestion, tell us what you were trying to work out.
- For a problem with a page, tell us your device and browser.
What we cannot do
We are not able to help with individual homework questions, give tutoring or confirm exam answers. Our guides and calculators are the best place to start, and your teacher is the best person to ask about what a particular course requires.
We aim to reply within a few working days.