Contact us
We'd like to hear from you. Whether you found a bug, think a result looks wrong or want a calculator we don't have yet, send us a note.
To report a calculation problem
Please include:
- The page address (URL) of the calculator.
- The values you entered. The Copy link button under each calculator saves them in a link you can paste into your email.
- The result you expected and, if possible, where that figure comes from.
Advertising and partnerships
We do not accept paid placements inside calculators or sponsored results. For other enquiries, email us with "Partnership" in the subject line.
Privacy
We use your email address only to reply to you. See our privacy policy for details.