Questions, corrections and suggestions are welcome. The quickest way to reach Concrete Math Pro is by email.
We read every message and aim to reply within two business days.
Found a wrong number?
If a result looks wrong, please tell us. Include the page, the measurements you entered and the answer you expected. Errors in a formula or a table are checked against the sources on the How We Calculate page and corrected as soon as they are confirmed.
Suggest a calculator
If there is a concrete, gravel or masonry calculation you need and cannot find on the calculators page, send a short description of the job. Requests help decide what gets built next.
What we cannot help with
We cannot give structural or engineering advice, review plans or recommend contractors. Thickness, reinforcement and footing sizes for anything structural should come from your local building department or a licensed engineer.