Contact
The fastest way to reach us is email:
Good reasons to write
- A correction. Include the page URL and what looks wrong. If you have a source, send it too.
- A calculator idea. Tell us the project and which numbers you wish you had.
- A result that surprised you. Share the calculator link — the inputs are saved in the URL, so we can see exactly what you entered.
What we can't help with
We can't review plans for a specific site, calculate structural loads or give legal, engineering or medical advice. For those, contact your local building department or a licensed professional. See our disclaimer.