contact
real human, slow but reliable replies
The fastest way to reach us is by email. Please include the calculator name, your browser, and an example of what you typed if you're reporting a wrong result — that lets us reproduce the issue on the first try.
› what to send
- Bug report — which calculator, what you entered, what you expected, what you got.
- Feature request — what calculation you're trying to do and how you'd want it to work.
- Compliance / legal / DMCA — please put the type in the subject line so it gets routed correctly.
- Press / interview — happy to help; please include a deadline.
› what not to send
Cold outreach, link-exchange offers, "guest post" pitches, and SEO services will be ignored. Sorry — it's nothing personal, the volume is just too high.