Tons, yards, and truckloads for #57 stone, dense grade, and driveway limestone. Driveways usually run 4 inches of dense-grade base with 2 to 3 inches of #57 on top.
Pro habit: Order about 2.7 yd³; dense grade locks in tight when compacted, and #57 scatters into low spots as it is spread.
Quarries usually sell limestone by the ton, so use the tons figure when you call and confirm their conversion since screenings weigh more than clean stone. Weights are common industry approximations; confirm with your supplier before ordering.
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Multiply length by width by depth in feet, then divide by 27 to get cubic yards. This limestone calculator does it for you: enter length and width in feet and depth in inches, and it returns cubic yards, estimated tons, and truckloads. Add about 10 percent for compaction, spillage, and uneven grade.
Limestone runs roughly 1.32 tons per cubic yard as a common industry approximation (#57 stone (clean, 3/4") at about 2,650 lb/yd³). Moisture and material change this, so confirm the exact conversion with your supplier.
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