How much pea gravel for 400 square feet?
At 3 inches deep, 400 square feet needs 3.70 cubic yards of pea gravel, or about 200 bags (0.5 cu ft (50 lb) each).
Pea gravel weighs about 1.4 tons per cubic yard.
| Depth | Cubic yards | 0.5 cu ft (50 lb) bags | Tons |
|---|---|---|---|
| 2 in | 2.47 | 134 | 3.46 |
| 3 in | 3.70 | 200 | 5.19 |
1 cubic yard = 27 cubic feet. Bulk delivery is usually cheaper than bags above about 1 to 2 cubic yards.