Contact

Get in touch.

Have a question, found a bug, or want to suggest a new calculator? Send us a message and we'll get back to you.

Frequently asked questions

How quickly will you reply?

We aim to respond within 2 business days. For bug reports we often fix the issue the same day.

Can I suggest a new calculator?

Absolutely. Tell us what calculation you need and we'll consider adding it to the site.

I found a calculation error — what should I do?

Please use the bug report subject and describe the inputs you used and what result you expected. We take accuracy seriously.