To make one yard of concrete from 80# bags you will need about 40-45 bags. Each bag is about .67 or 2/3 cubic foot. you will need 27 cubic feet to make 1 cubic yard. Cheaper to have a redimix truck deliver, and a lot less work.
A British pound coin is 22.5 millimetres in diameter (0.89 inches) and is 3.15 millimetres thick (0.124 inches).
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one (1) cubic yard of concrete four inches thick will cover 80 sq. feet. 85 yards x 81 = 6885 sq. feet.
How many square yards in a 20x18 feet 3 inches thick
go to any search. and type in concrete calculater
The concrete typically used for driveway construction is around 4 inches thick.
A concrete driveway should be at least 4 inches thick to ensure durability and longevity.
Concrete driveways are no less than 3.5 inches to 4.5 inches.
To calculate the number of 80-pound bags of concrete needed for a 2x2 slab that is 6 inches thick, first determine the volume of the slab. The volume is 2 feet x 2 feet x 0.5 feet (6 inches) = 2 cubic feet. An 80-pound bag of concrete typically yields about 0.6 cubic feet. Therefore, you would need approximately 4 bags (2 cubic feet ÷ 0.6 cubic feet per bag = about 3.33 bags, rounded up to 4).
4 To 6 inches
A British pound coin is 22.5 millimetres in diameter (0.89 inches) and is 3.15 millimetres thick (0.124 inches).
90 sq yds at 4" thick.
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About 162sf.
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should be at lest 4 inches