Contact us

We read every message. The fastest way to reach us is email:

[email protected]

What to contact us about

• Report an error — if you believe a conversion factor, formula or explanation is wrong, tell us the page and what you expected. Corrections are our top priority.
• Request a conversion — missing a unit pair you need? We add new conversions regularly based on requests.
• Feedback — ideas to make the site faster or clearer are always welcome.

We usually reply within a few business days.