About 2.47 cubic yards without considering the waste factor, and 2.72 cubic yards with a waste factor of 10%. That's 3.7 and 4.1 US tons, respectively.
To calculate crushed stone in yards:
Multiply the together the length, width, and depth measured in feet.
Multiply by 27 to convert cubic feet into cubic yards.
Multiply by 1.5 to calculate the weight of the crushed stone in tons.
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