How Many Cubic Feet in an 80 Pound Bag of Concrete?

Answer

An 80 pound bag of concrete will provide about .6 of a cubic foot, so for four cubic feet, you would need seven 80 pound bags of concrete.
Q&A Related to "How Many Cubic Feet in an 80 Pound Bag of Concrete..."
U need 1.63 80lb bags per square ft so 131bags to do 8ft by 8ft.
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Concrete sells in bags
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A 90 lb bag of ready mix will make about 2/3 cu ft. Check the bag for exact volume. If you are using 2x4 for framing the slab, you actually have a 3.5" thick slab, not 4"
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You should calculate the volume of your slab in cubic yards. First get the volume in cubic feet by multiplying your dimensions together (change 4" to 1/3 ft) . This gives; 80
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