Gravel Driveway Calculator
Calculate cubic yards, tons, and cost for your gravel driveway project.
Breakdown
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How to Use This Gravel Driveway Calculator
Enter your driveway's length, width, and desired gravel depth using your preferred units (feet, meters, or yards for length/width; inches, centimeters, or feet for depth). Select your gravel type, add a price per ton if you want a cost estimate, and set a wastage percentage to account for compaction and spillage. Click Calculate to instantly see cubic yards, cubic feet, tons, and total cost.
Why This Matters
Buying too little gravel means a second trip to the quarry — often with a minimum delivery fee of $50–$150. Buying too much wastes money and leaves you with an annoying pile to dispose of. A standard 50 ft × 12 ft driveway at 4 inches deep requires roughly 7.4 cubic yards or about 10 tons of crushed stone. At a typical price of $40–$60 per ton delivered, that's $400–$600 just in material.
Depth matters enormously. Going from 3 inches to 6 inches doubles your material cost. For a new driveway, most contractors recommend a 4–6 inch base layer plus a 2-inch top dressing. For an existing driveway top-up, 2 inches is usually enough. This calculator helps you price out each scenario before committing.
Homeowners, landscapers, and contractors all rely on accurate material estimates to write bids, plan deliveries, and avoid costly overages. Getting the math right upfront is the single biggest way to control project costs.
How It's Calculated
The core formula converts your driveway dimensions into cubic yards, then converts to tons:
Volume (ft³) = Length (ft) × Width (ft) × Depth (ft)
Volume (yd³) = Volume (ft³) ÷ 27
Tons = Volume (yd³) × Density (tons/yd³) × (1 + Wastage%)
All input units are converted to feet first. The wastage multiplier (default 10%) accounts for material that compacts, spreads beyond the edge, or is lost during spreading. Density varies by gravel type — crushed stone averages 1.35 tons per cubic yard, while denser limestone runs about 1.5 tons/yd³.
Tips & Common Mistakes
- Measure twice. A 5-foot error on a 50-foot driveway is a 10% material error — that's nearly a full ton of gravel.
- Don't skip wastage. At minimum, add 5–10% for compaction. For rough or sloped ground, use 15%.
- New vs. top-up driveways: New installs need 4–6 inches. Refreshing an existing driveway usually only needs 1.5–2 inches.
- Order by the ton, not by the bag. Bulk delivery is dramatically cheaper once you need more than 0.5 cubic yards (~half a ton).
- Check local delivery minimums. Most quarries have a 1–2 ton minimum order. Confirm before you calculate a very small project.
Frequently Asked Questions
How deep should a gravel driveway be?
For a new driveway, a depth of 4–6 inches is standard for the base layer, topped with 1–2 inches of smaller decorative gravel. For topping up an existing driveway, 1.5–2 inches is typically sufficient. Heavier vehicles like trucks or RVs benefit from a 6-inch base.
How many tons of gravel are in a cubic yard?
It depends on the gravel type. Crushed stone averages about 1.35 tons per cubic yard, pea gravel around 1.4 tons, and limestone closer to 1.5 tons. When in doubt, use 1.4 as a safe middle estimate. This calculator lets you select the specific type for accuracy.
What's the difference between cubic yards and tons?
Cubic yards measure volume — the space the gravel takes up. Tons measure weight. Suppliers sell and deliver by the ton, so you need to convert from volume to weight using the material's density. This calculator handles that conversion automatically based on the gravel type you select.
How much does a gravel driveway cost?
Material costs typically run $30–$65 per ton depending on gravel type and your location. A 50×12 ft driveway at 4 inches deep needs roughly 10 tons, putting material cost at $300–$650. Add $100–$300 for delivery and $200–$600 for installation labor if you're hiring out.