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how to estimate yards of concrete needed. Mark your area that needs concrete and divide it into smaller areas. That means a 80-pound bag of concrete mix will yield 06 cubic feet of concrete a 60-pound bag will yield 045 cubic feet and a 40-pound bag yields 03 cubic feet.
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The formula for cubic yards is this. Steps to Calculate Cubic Yards of Concrete Measure the length width and height of the slab footing or column. All calculations are rounded up to the next highest whole bag.
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The depth is somewhat trickier so well use a standard thickness of four inches for this slab. Not all concrete forms are created the same. Concrete weighs about 4000 pounds per cubic yard 2400 kg per cubic meter. Calculate the volume of the area after determining the shape of the area see the chart below by multiplying in the.
