- Instant answersResults update as you type.
- Private by designRuns in your browser. Nothing is sent.
- Share, print or citeCopy a link with your numbers.
| Depth | Cu yd | Tons (≈1.4 t/yd³) |
|---|---|---|
| 2″ | 4.94 | 6.91 |
| 3″ | 7.41 | 10.37 |
| 4″ | 9.88 | 13.83 |
| 6″ | 14.81 | 20.74 |
| 8″ | 19.75 | 27.65 |
Worked example
20 × 40 = 800 sq ft; × 4 in ÷ 12 = 266.7 cu ft; ÷ 27 = 9.88 yd³ ≈ 13.83 tons. Density varies by stone type and moisture, so confirm with your supplier.
Frequently asked questions
How many tons of gravel for 20×40?
About 13.83 tons at 4 inches.