Measuring for cement is not difficult once you know the dimensions of the area where you will put it. For instance, if you are using the concrete area for a patio, then four inches deep will be sufficient. If you are using it for a carport, you may want to go six inches deep. In any case, measuring for how much cement you will need involves just a little math once you know the measurements.
Things You'll Need
 Paper
 Tape measure
 Pencil

Measure the length and width of the area you will be covering. Determine how thick the concrete pad must be. For most applications 4 inches is fine, but you should consider making it thicker if it will serve as a carport or something similar.

Calculate your figures. For an example, we will use 25 feet long by 15 feet wide and 4 inches deep as the area. In this case, you would multiply 25 x 12 inches and 15 x 12 inches, which will be 300 x 180 inches.

Multiply 300 x 180 x 4 and you will see that the answer is 216,000 cubic inches. Divide 216,000 cubic inches by 46, 656 (number of cubic inches in a yard) and round the answer off to 4.63 yards, which is the amount of concrete you will need. When you order from the concrete company, that is how much you will order.
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