Contact

Email us at [email protected]

What to write to us about

• Calculation errors. If a result looks wrong, tell us which calculator, what you entered and what you expected. That lets us reproduce it.
• Corrections. If something on a page is inaccurate, unclear or out of date, let us know, ideally with a source.
• Suggestions. Ideas for new calculators or for improving the existing ones.

Please note

This is a small independent project, so replies may take a while. We can't give project-specific advice, quotes or professional recommendations. For those, check with your supplier or a qualified professional.