Contact Us
We welcome questions about our calculators, corrections to our content, and ideas for new tools.
The fastest way to reach us is by email:
We aim to reply within a few days. If you are reporting an error in a calculator, please include the numbers you entered and the result you expected — it helps us fix things quickly.
Before You Write
If you have a question about a specific material quantity, try the relevant calculator first — most pages include the full formula, a worked example and a FAQ section that answers the most common questions. You may find your answer immediately.
Privacy Note
Our calculators run entirely in your browser and collect no personal data. If you email us, we will use your address only to reply to your message. See our Privacy Policy for details.