Free Gravel and Aggregate Calculator
Use our free calculator to determine exactly how much gravel, stone, sand, or fill material your project requires. Enter your project dimensions below and we will calculate cubic yards, tons, and an estimated cost — including a 10 percent overage buffer to make sure you never run short.
Quantity Calculator
Enter your project dimensions
How to Use This Calculator
- Select your project type from the dropdown to help us recommend the right material depth.
- Enter the length and width of your project area in feet. For irregular shapes, break the area into rectangles and calculate each one separately.
- Enter the depth in inches. Common depths: 2–3 inches for walkways, 3–4 inches for patios, 4–6 inches for driveways, 12–18 inches for French drains.
- Review the results — the calculator shows cubic yards, tons, and estimated cost with a 10% overage built in.
Coverage Chart: How Far Does a Ton Go?
The number of square feet one ton of material covers depends on the density of the material and the depth you apply it. Here is a quick reference:
| Material | 1 Ton Covers (2" deep) | 1 Ton Covers (3" deep) | 1 Ton Covers (4" deep) |
|---|---|---|---|
| Crushed Limestone (#57) | 108 sq ft | 72 sq ft | 54 sq ft |
| Pea Gravel | 116 sq ft | 77 sq ft | 58 sq ft |
| Flex Base | 108 sq ft | 72 sq ft | 54 sq ft |
| River Rock | 120 sq ft | 80 sq ft | 60 sq ft |
| Sand | 120 sq ft | 80 sq ft | 60 sq ft |
| Fill Dirt | 147 sq ft | 98 sq ft | 74 sq ft |
| Topsoil | 162 sq ft | 108 sq ft | 81 sq ft |
| Decomposed Granite | 116 sq ft | 77 sq ft | 58 sq ft |
Why We Include 10% Overage
Our calculator automatically adds a 10 percent overage to your order. This accounts for compaction loss, uneven subgrade, and minor spreading beyond your project boundaries. In our experience, running short is far more expensive than having a small surplus — a second delivery can cost $100 to $150 in fees for just a small top-up load.
If you have leftover material, it is always useful for future maintenance, filling low spots, or sharing with a neighbor.
Recommended Depths by Project
- Decorative landscaping: 2–3 inches
- Walkways and paths: 2–3 inches
- Patios: 3–4 inches (plus 4–6 inch base layer)
- Driveways: 4–6 inches surface (plus 4–6 inch sub-base)
- French drains: 12–18 inches
- Parking areas: 6–8 inches
- Road base: 6–12 inches