Design beautiful river rock landscapes.
River rock is heavy and expensive. Calculate the exact cubic yards and tons needed for your project before you order — and never overspend on stone again.
Enter Project Dimensions
Project Diagram
Total Volume
Enter dimensions above
Estimated Weight
Based on River Rock density (1.35 t/yd³)
Recommended Depths for River Rock
| Project / Use Case | Recommended Depth |
|---|---|
| Decorative Ground Cover | 2–3 inches |
| Dry Creek Bed | 4–6 inches |
| Garden Border / Edging | 3–4 inches |
| Drainage / French Drain | 12 inches |
How to Calculate River Rock Volume
Most landscaping suppliers sell river rock by the cubic yard. To convert your project area to cubic yards, use this formula:
Our calculator also multiplies your cubic yard result by 1.35 tons/yd³ (the standard density for river rock) to show estimated weight — essential if you are hauling the material yourself or need delivery pricing.
Pro Tips for River Rock Projects
Install a weed barrier (landscape fabric) beneath all river rock to prevent weeds from growing up through the stones.
River rock does not decompose, so it is a zero-maintenance alternative to wood mulch in hot climates.
For dry creek beds, mix small (1-3 inch) and large (3-5 inch) rocks for a natural, realistic appearance.