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Sourced and private. ENERGY STAR sizing · manufacturer bag yields. Nothing you enter leaves your device.
Depth
Cu yd
Tons (≈1.4 t/yd³)
2″
3.95
5.53
3″
5.93
8.30
4″
7.90
11.06
6″
11.85
16.59
8″
15.80
22.12
Worked example
16 × 40 = 640 sq ft; × 4 in ÷ 12 = 213.3 cu ft; ÷ 27 = 7.90 yd³ ≈ 11.06 tons. Density varies by stone type and moisture, so confirm with your supplier.