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| 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.
Frequently asked questions
How many tons of gravel for 16×40?
About 11.06 tons at 4 inches.