Contact us

Found a bug, want a new calculator, or have a question about a law? We would love to hear from you.

Email us at contact@diffusioncalculator.com.

When reporting a calculation issue, please include:

  • The calculator page URL. The Copy result button gives a link with all your inputs, which is ideal.
  • The result you expected and where it came from (textbook, paper, software).

We read every message and aim to reply within a few working days.