Have a question, found a result that looks wrong, or want us to build a new calculator? Send us a message and we will get back to you, usually within a few business days.
Reporting a calculation error
Please tell us which calculator you used, the values you entered and the result you expected. You can use the “Copy link” button under the result and paste the link into your message; it contains your inputs. We check every report and correct confirmed errors.
What we cannot help with
We cannot give project-specific engineering, structural or code-compliance advice. For load-bearing or permitted work, please consult a qualified local professional.
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