Gravel Driveway Calculator: How Much Gravel?
Estimate driveway gravel in cubic yards and tons from length, width, depth, density, and waste allowance before ordering material.
Written by Calzivo Editorial Team
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Quick answer
In short
- Formula: Cubic yards = length in feet x width in feet x depth in inches / 324.
- Tons: Estimated tons = cubic yards x supplier tons-per-cubic-yard density.
- Use the tool: Enter dimensions, depth, density, overage, and optional price in the Gravel Calculator.Open calculator
Calculate it faster: Use the Gravel Calculator, check volume with the Cubic Yard Calculator, or convert known square feet with the Square Feet to Cubic Yards Calculator.
Browse more helpers in Construction Calculators.
Planning estimate only: Gravel needs vary by measurement accuracy, depth, density, compaction, stone type, drainage, delivery, supplier specs, and local site conditions. Confirm final quantities with your supplier or contractor.
Quick answer
Measure driveway length and width in feet, choose the gravel depth in inches, calculate cubic yards, then convert to tons if your supplier sells by weight. Add overage for compaction, spreading loss, low spots, and irregular edges.
Gravel driveway calculator formula
Cubic yards = length ft x width ft x depth in / 324 Tons = cubic yards x tons per cubic yard Order amount = estimate x (1 + waste percent)
Worked example
A 40 ft by 12 ft driveway at 4 inches deep:
40 x 12 x 4 / 324 = 5.93 cubic yards 5.93 x 1.5 tons/yd3 = 8.9 tons With 10% overage: about 6.5 yd3 or 9.8 tons
Driveway depth and waste allowance
| Project | Planning depth | Note |
|---|---|---|
| Light refresh | 2 inches | Top-up over a firm existing surface. |
| Surface refresh | 3-4 inches | Common planning range for resurfacing. |
| New or weak base | 4-6 inches or layered base | Soil, traffic, and drainage matter. |
Read the Gravel Driveway Depth and Overage Guide before choosing a depth.
Cubic yards vs tons
Cubic yards measure volume. Tons measure weight. Gravel density varies by stone type, moisture, gradation, and compaction, so supplier density should override generic online examples. See Cubic Yards to Tons for the conversion workflow.
Cost planning
Once you know cubic yards or tons, compare material price, delivery, labor, base prep, drainage, and spreading/compaction. For budget factors, use the Gravel Driveway Cost Guide.
Common mistakes
- Using square feet without depth.
- Forgetting overage for compaction and uneven spots.
- Using one density for every gravel product.
- Measuring a flared driveway as one simple rectangle.
- Ignoring drainage and base prep.
FAQs
How many tons of gravel do I need for a driveway?
Calculate cubic yards first, then multiply by the supplier density in tons per cubic yard.
How many cubic yards of gravel do I need?
Use length x width x depth in inches / 324, then add overage.
How deep should driveway gravel be?
A refresh may use 2-4 inches, while new or weak-base projects may need a deeper layered base.
What size gravel is best for a driveway?
Angular crushed stone usually locks together better than rounded gravel, but local supplier recommendations matter.
For driveway gravel, measure area, choose realistic depth, convert to cubic yards, convert to tons with supplier density, and add a practical overage allowance.
Use the tool instead
Use the matching calculator when you want to plug in your own numbers and get a result faster.
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