Found a bug, or need a new calculator?

Tell us what's missing, what's broken, or what you'd like calculated next — we read every message.

Email us directly

For anything specific — bug reports, feature requests, or partnership questions.

Response time: this is a small, independently run project, so replies usually land within a few days. Bug reports with the exact calculator page and the inputs you used get fixed fastest.

Send a message

This opens your email app with the details pre-filled — nothing is sent from this page directly.