The short version
Square feet × depth in inches ÷ 324 = cubic yards. Multiply cubic yards by the material's weight per yard to get tons, since rock is sold by the ton. A 10 × 50 ft driveway (500 sq ft) at 4 inches is 6.17 cubic yards, which comes to about 9.3 tons of crushed limestone, or 10.4 tons with 12% overage.
Tons per 100 sq ft, by material and depth
| Material | Tons per cubic yard | 2 in | 3 in | 4 in |
|---|---|---|---|---|
| Pea Gravel | 1.4 | 0.86 | 1.30 | 1.73 |
| River Rock | 1.4 | 0.86 | 1.30 | 1.73 |
| Crushed Limestone | 1.5 | 0.93 | 1.39 | 1.85 |
| Decomposed Granite | 1.4 | 0.86 | 1.30 | 1.73 |
| Masonry Sand | 1.35 | 0.83 | 1.25 | 1.67 |
| Utility Rock (3/4") | 1.45 | 0.90 | 1.34 | 1.79 |
These weights lean to the high side so the load you order is enough. Bigger stone weighs more per yard, which is why the calculator asks which material you want.
How deep to lay it
- Driveway base: 4 inches over a packed sub-base.
- Decorative path: 2 to 3 inches.
- Drainage rock: 4 to 6 inches.
- French drain: enough to bury the pipe by 2 inches.
Order it
Order by 10 AM for same-day delivery across south DFW on in-stock material. Details are in the delivery policy.
- Pea Gravel, 5/16"
- Utility Rock, 3/4"
- 1" Crushed Limestone
- Decomposed Granite
- Texas Blush Granite
- Infield Clay
- Sabine River Rock, 2"–4"
- Sabine River Rock, 4"–8"
See all rock & gravel prices and stock · Rock & Gravel material guide