Contact
Found a bug, have an idea for a calculator, or a question about privacy? Send us an email.
rob@mawing.comOpens your email app
Why there’s no contact form
A contact form would mean collecting your name and email address on this site. We would rather not collect anything at all, so we use plain email instead. You choose what to send and from which address.
Anything you send is used only to reply to you and to improve the site. See our privacy policy for details.
Reporting a wrong answer
If you think the calculator has given a wrong result, it helps to include the exact keys you pressed and the steps shown in your history. A screenshot of the steps panel is ideal.