Calculate Your Project
Project Diagram
Total Volume
—Cubic Yards
Enter dimensions above
Estimated Weight
—Tons
Based on Gravel & River Rock density (1.4 t/yd³)
Free Gravel & River Rock Calculator
Calculate your stone project precisely.
Gravel is sold by the ton but measured in yards. Our calculator does both conversions instantly — so you order exactly the right amount from your quarry.
Gravel & River Rock Reference Guide
Gravel & River Rock Density & Weight Reference
| Measurement System | Total Volume | Estimated Weight |
|---|---|---|
| Imperial (US) | 1 Cubic Yards | 1.4 Tons (2,800 lbs) |
| Metric (EU) | 1 m³ | 1.83 Tonnes (1,831 kg) |
* Note: Exact weight can vary based on moisture content and compaction.
Recommended Depths for Gravel & River Rock
| Project / Use Case | Recommended Depth |
|---|---|
| Driveway Base Layer | 4–6 inches |
| Driveway Top Layer | 2–3 inches |
| Walkway / Path | 2–3 inches |
| French Drain / Drainage | 12+ inches |
How to Calculate Gravel & River Rock Volume
Most landscaping suppliers sell gravel & river rock by the cubic yard. To convert your project area to cubic yards, use this formula:
Volume (cu yd) = (Length × Width × Depth) ÷ 27
Our calculator also multiplies your cubic yard result by 1.4 tons/yd³ (the standard density for gravel & river rock) to show estimated weight — essential if you are hauling the material yourself or need delivery pricing.
Pro Tips & Insights
1
For driveways, use angular crushed stone (not round river rock) — the jagged edges lock together and resist shifting under vehicle weight.
2
Compact each 3-inch lift of gravel with a plate compactor before adding more layers.
3
Use landscape fabric under decorative gravel to block weeds and prevent the stone from sinking into the soil over time.
Frequently Asked Questions
How much gravel do I need for a driveway?▼
A standard residential driveway (20ft × 40ft) needs 4–6 inches of gravel base. At 4 inches deep: 9.9 cubic yards or ~13.8 tons. At 6 inches deep: 14.8 cubic yards or ~20.7 tons. Use our calculator for your exact driveway dimensions.
Do I order gravel by the yard or the ton?▼
Quarries typically sell gravel by the ton, but volume is measured in cubic yards. 1 cubic yard of gravel ≈ 1.4 tons. Enter your dimensions above and we automatically show you both measurements.
What is the best gravel for a driveway?▼
#57 crushed limestone or granite is the most popular driveway gravel. It is angular, compacts well, and provides excellent drainage. Pea gravel is attractive but shifts under vehicle tires and is better for decorative paths.
How deep should river rock be for landscaping?▼
For decorative landscape river rock, a depth of 2 to 3 inches is sufficient for weed suppression and aesthetics. For a drainage application (like a dry creek bed), you need 6 to 12 inches of river rock.