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Contact

Found a bug, have an idea for a new tool, or just want to say something? We love hearing from the people who use the site.

Write to us

We reply to the address you leave. We do not use it for anything else.

Tell us which calculator, what you entered and what you expected.

If you are reporting a bug

Include the calculator, the numbers you entered and the result you expected. With that we can reproduce the problem in minutes; without it, rarely.

If the bug involves an official rate or fee that changed, tell us where you got the new figure. Every official number on this site carries its source and its date, so that is how we update one properly.

Tool suggestions

The best tools on the site come from real needs. If there is a calculation you repeat every week and can't find a good place to do it, tell us and we will consider it for a future phase.