Guides / Driveway Gravel Amount
How Much Gravel for a Driveway? Estimate Tons and Cubic Yards
Reviewed by: Rock Calculator Editorial Team
Last updated: July 20, 2026
The amount of gravel for a driveway depends on the measured area, planned depth, base condition, density, compaction, and whether you are refreshing the surface or building a new section.
Driveway Gravel Formula
Use this formula for a rectangular driveway: cubic feet = length x width x depth. Length and width are measured in feet. Depth is measured in inches, then divided by 12 to convert it to feet. Divide cubic feet by 27 to get cubic yards.
After cubic yards are known, multiply by material density to estimate tons. If the supplier gives a density value, use it. If not, a general gravel planning value around 1.35 tons per cubic yard can be used for a rough estimate.
Example Driveway Calculation
For a 60 ft by 12 ft driveway at 4 inches deep:
- Area = 60 x 12 = 720 square feet
- Depth = 4 inches / 12 = 0.333 feet
- Volume = 720 x 0.333 = about 240 cubic feet
- Cubic yards = 240 / 27 = about 8.89 cubic yards
- Tons at 1.35 tons per cubic yard = about 12.0 tons
- With 10% extra = about 13.2 tons
| Driveway Work | Depth to Try First | Important Note |
|---|---|---|
| Top-up on firm base | 2 to 3 inches | Good for refreshing thin or bare areas. |
| General surface layer | 3 to 4 inches | Works when the base is already shaped and stable. |
| New driveway section | 4 to 8 inches or layered | Often needs base stone, grading, and compaction. |
| Heavy vehicle area | Project-specific | Ask a contractor or supplier about base design. |
| Soft or wet ground | Project-specific | Fabric, drainage, and excavation can change quantity. |
Surface Layer vs Base Layer
A driveway surface refresh is not the same as a full driveway build. A surface layer improves coverage and appearance. A base layer supports traffic. If the existing driveway has potholes, pumping, standing water, or soft edges, more surface gravel alone may not solve the problem.
For a new driveway, many installers build in layers: larger base stone, compacted intermediate material, and a smaller top layer. Calculate each layer separately because each layer may use a different material density and depth.
Order Quantity Checklist
- Measure length and width in feet.
- Choose depth based on whether this is a refresh, surface layer, or new build.
- Convert volume to cubic yards and tons.
- Add waste or compaction allowance where needed.
- Confirm density, delivery minimum, and truck access with the supplier.