Contact us
We read every message. A precise bug report or a suggestion for a new calculator is always welcome.
What to include
- For a wrong answer: the calculator name, the exact values you entered and what you expected. That lets us reproduce it quickly.
- For a suggestion: what you were trying to work out and what was missing.
- For a display problem: your device, browser and the page address.
What we cannot do
We are unable to help with individual homework questions, offer tutoring or confirm exam answers. The calculators and guides are the best starting point, and your teacher is the right person to ask about your particular course.
We aim to reply within a few working days.