Contact us
Questions, calculator requests, or feedback — we read every message.
The fastest way to reach us is by email. We typically reply within two business days.
What to include
- The calculator or page you're writing about
- What you expected versus what happened, if you're reporting an issue
- For new tools, the project type and the units you work in
Calculator requests
We prioritize new calculators based on reader demand. If there's an estimate you wish we had, tell us — many of our tools started as a single email.
Business & press
For partnership or media inquiries, use the same address with "Partnership" or "Press" in the subject line and we'll route it to the right person.