Math CentralQuandaries & Queries


Question from Carol:

How many bags of portland cement will I need for an area that is 18' x 31' with a thickness of 4".
The bags weigh 94 lbs if that is necessary. Thank you for any help.

Hi Carol,

You can use our volume calculator to find the volume of concrete you need. The number of bags of cement you need will depend of the aggregate you mix with the cement and the ratio of cement to aggregate in your mix. Ask the merchant who is selling the bags of cement, you may get help there.


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