Enter your project dimensions to instantly calculate the gravel needed.
How the Gravel Calculator Works
Enter Length, Width & Depth
Calculate Cubic Yards Needed
Select Your Material Type
Convert to Tons for Ordering
What is a Gravel Calculator?
A Gravel Calculator estimates how much gravel, crushed stone, or sand you need for a driveway, walkway, drainage bed, or landscaping project, based on the area's length, width, and desired depth. Since gravel and similar materials are typically sold by weight (tons) or bulk volume (cubic yards) rather than by area, this calculator converts your project dimensions into an accurate ordering quantity, helping you avoid running short mid-project or over-ordering and wasting money.
The Gravel Calculation Formula
Cubic Yards = (Length × Width × Depth in feet) ÷ 27
Tons Needed = Cubic Yards × Material Density
Since depth is usually measured in inches, this calculator automatically converts it to feet (dividing by 12) before calculating volume. Different materials have different densities — gravel and crushed stone typically weigh around 1.4 to 1.6 tons per cubic yard, while sand is slightly lighter at around 1.35 tons per cubic yard.
Recommended Gravel Depth by Project Type
| Project | Recommended Depth |
|---|---|
| Driveway base layer | 4 – 6 inches |
| Driveway top/finish layer | 2 – 3 inches |
| Walkway or garden path | 2 – 3 inches |
| Drainage bed | 4 – 6 inches |
| Decorative landscaping | 2 inches |
Choosing the Right Material
- Crushed stone/gravel: Excellent for driveways and drainage due to good compaction and water flow.
- Pea gravel: Smooth, rounded stones popular for pathways and decorative areas, though less stable underfoot than angular crushed stone.
- Crushed limestone: A durable, cost-effective option that compacts well for driveway base layers.
- Sand: Used as a leveling layer under pavers, or mixed with gravel for certain drainage applications.
Tips for Ordering Gravel
- Order 10% extra: Uneven ground and compaction can require slightly more material than the flat calculation suggests.
- Consider a two-layer approach for driveways: A coarser base layer topped with a finer finish layer often performs better long-term than a single layer.
- Check delivery minimums: Many suppliers have minimum order quantities for bulk delivery, so confirm before finalizing your order.
- Plan for proper drainage: Slight grading beneath the gravel layer helps prevent water pooling and erosion over time.
Frequently Asked Questions
How much gravel do I need for a driveway?
This depends entirely on your driveway's length, width, and desired depth — enter your specific dimensions into the calculator above for an accurate tonnage estimate.
What's the difference between gravel and crushed stone?
Gravel typically refers to naturally rounded stones, while crushed stone is mechanically crushed into angular pieces that interlock and compact more effectively, making it often preferred for driveways.
Should I add a fabric layer under gravel?
Landscape fabric or geotextile is commonly recommended under gravel driveways and paths to prevent weed growth and reduce gravel sinking into the soil over time.
How is this different from the Topsoil Calculator?
Gravel and topsoil have very different densities and uses — use our dedicated Topsoil Calculator if you're estimating soil for gardening or lawn projects instead.