Contact

The best way to reach us is by email:

Write to us if you:

found a mistake in a calculator or an explanation,
would like a calculator for a project we do not cover yet,
have a question about the site or about our privacy policy.

If you are reporting a calculation problem, include the page and the numbers you entered so we can reproduce it.

We cannot give advice on specific construction projects. For structural work, please speak to a licensed contractor or your local building department.