Pea Gravel Calculator
Calculate pea gravel needed in cubic yards.
Last updated 2026-08-21
What Is a Pea Gravel Calculator?
The pea gravel calculator estimates how much smooth, rounded pea gravel you need for a path, play area, or drainage bed. Enter the length, width, and depth of the area to get the volume in cubic yards and the weight in tons.
How It Works
Volume = Length × Width × (Depth ÷ 12). Weight ≈ Cubic yards × 1.3 tons.
Example
A 10 ft × 10 ft area at 2 in deep: 16.7 cu ft ≈ 0.62 cu yd → ~0.8 tons.
How to Calculate
- Measure the length and width of the area in feet. A 10 ft by 10 ft play area is 100 sq ft.
- Choose a depth. About 2 to 3 in works well for paths and play areas.
- Enter the dimensions. At 100 sq ft and 2 in deep, the volume is 16.7 cu ft, about 0.62 cubic yards.
- Read the weight. Pea gravel runs about 1.3 tons per cubic yard, so you need about 0.8 tons.
- Lay landscape fabric first to keep the stones from sinking into the soil and to slow weed growth.
Pea Gravel Coverage by Depth
| Depth | Coverage (sq ft per cubic yard) | Tons per Cubic Yard |
|---|---|---|
| 2 in | 162 sq ft | 1.3 tons |
| 3 in | 108 sq ft | 1.3 tons |
| 4 in | 81 sq ft | 1.3 tons |
| 5 in | 65 sq ft | 1.3 tons |
| 6 in | 54 sq ft | 1.3 tons |
Sources
Frequently Asked Questions
Where is pea gravel used?
Paths, play areas, drainage beds, and around plants. Its smooth stones are easy on feet and pets.
Why is pea gravel lighter than crushed stone?
Round stones pack with more air space, so a cubic yard weighs a bit less.
Do I need a weed barrier?
Landscape fabric under pea gravel greatly reduces weed growth and keeps stones from sinking into soil.
Estimate the cost with the Landscaping Cost Calculator or browse Landscaping Calculators