Contact Us
Questions, corrections or a calculator request? Get in touch.
The fastest way to reach us is by email:
We read every message and usually reply within 2–3 days. Email is especially welcome for:
- Corrections — if any calculator gives a wrong result, tell us the inputs you used and we will investigate and fix it.
- Book and tool requests — a calculator or converter you wish existed? Suggest it; the most-requested tools get built first.
- Feedback — anything confusing, slow or broken on the site.
Please do not send personal or financial documents — the calculators never need them, and email is not a secure channel for sensitive information.