How to Estimate Concrete Amount

Having the ability to estimate the amount of concrete you will need to order is vital to the success of your concrete job.

A four inch slab is probably the most common concrete project example.  Usual jobs include sidewalks, driveways, patios, etc.

Four inches works into a cubic foot equation easily.  Since there is twenty seven cubic feet in a cubic yard then three square feet can be accounted for in each square foot.  Eighty one square feet per cubic yard of concrete can be derived from this formula.

Tom usually figures eighty square feet per cubic yard of concrete. 

Example:  Lets say you want to pour a five foot sidewalk that is one hundred feet long.  You would need five hundred square feet of concrete.  Five hundred times eighty is six and a quarter yards of concrete needed.  Make sure and account for any spillage that may occur and order six and a half yards of concrete.

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