Get in touch

The fastest way to reach National Calculators is by email:

[email protected]

Useful things to get in touch about:

• Corrections. If a figure looks wrong, tell us the calculator, your country, and what you expected. Corrections are prioritised.
• Suggestions. A calculator or country you would like to see.
• General questions about how a calculation works.

There is no contact form because the site does not collect personal data. Email keeps it simple and private.