Stone and rock estimator
Landscape Rock Calculator
Estimate the cubic yards of decorative rock, river rock, crushed stone, or drainage rock needed for a landscape bed or project area.
Formula: area in square feet × depth in feet ÷ 27 = cubic yards of landscape rock.
Calculate Landscape Rock
Enter length, width, and depth in the gravel calculator. Select rock to estimate volume, weight, and overage.
Rock Coverage by Depth
| Depth | Coverage per cubic yard | Typical use |
|---|---|---|
| 2 inches | 162 sq ft | Light decorative coverage |
| 3 inches | 108 sq ft | Landscape beds and borders |
| 4 inches | 81 sq ft | Heavier beds and pathways |
| 6 inches | 54 sq ft | Drainage and structural base |
Before Ordering Rock
- Confirm the stone type and its approximate weight per cubic yard.
- Measure depth after edging and base preparation are complete.
- Ask whether the supplier sells by cubic yard, ton, or both.
- Check delivery access and minimum order requirements.
FAQ
Multiply the landscape area by the planned depth in feet, then divide by 27.
Many decorative rock beds use 2 to 3 inches. Driveway and drainage applications may need a deeper base.
Rock density varies. A planning estimate is often around 2,500 to 4,500 pounds per cubic yard depending on the stone.
Yes. Add about 10 percent for uneven ground, settling, and small measuring differences.