Stone Calculator
Different stone types vary wildly in weight, so ordering the right amount means knowing both the volume you need and the density of your chosen material. Enter your project area, depth, and stone type to get accurate estimates in cubic yards, tons, and dollars.
How the Stone Calculator Works
The math starts with basic volume: Length x Width x Depth = Cubic Feet. Divide by 27 to get cubic yards. Then the calculator multiplies by the density of your chosen stone type to convert to weight in tons, since most suppliers sell stone by the ton.
Stone Density by Type
| Stone Type | Weight per yd3 | Weight per Ton Coverage (2" deep) |
|---|---|---|
| Crushed Stone | ~2,800 lbs | ~80 ft2 |
| River Rock | ~2,700 lbs | ~83 ft2 |
| Lava Rock | ~1,500 lbs | ~150 ft2 |
| Limestone | ~2,700 lbs | ~83 ft2 |
| Granite | ~2,900 lbs | ~77 ft2 |
Lava rock is dramatically lighter than other options, which means you get more coverage per ton but may need a deeper layer for full ground coverage since the pieces are more porous.
Recommended Depths
- Ground cover and decorative beds: 2-4 inches
- Walkways and pathways: 3-4 inches
- Drainage areas: 6-12 inches
- Driveway base: 4-8 inches
Ordering Tips
Always order 5-10% more than calculated to account for uneven terrain and settling. Stone doesn't compact as much as soil or mulch, but irregular ground still eats up material faster than flat areas.