Gravel & Stone Calculator
Gravel is sold by the ton for bulk delivery and by 50-lb bags for small projects. This calculator converts area and depth to cubic yards, then multiplies by the material density to get tons. Crushed stone #57 (the most common driveway stone) weighs about 1.4 tons per cubic yard.
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Top PickPea Gravel 50lb Bag — Home Depot~$5.48/bag* Affiliate links — we may earn a commission at no cost to you.
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How to Use This Calculator
- 1Enter your measurements in the fields above. Use the units shown next to each field (ft, in, etc.).
- 2Click Calculate to get your material estimate instantly.
- 3Review the highlighted result — it shows the key quantity you need to order.
- 4Use Copy Results to save your estimate, or bookmark the URL — your inputs are encoded in the link.
Pro tip: Always add 10% to your material order to account for waste, cuts, and defects.
Frequently Asked Questions
How much gravel do I need for a 20×20 ft driveway?
A 20×20 driveway (400 sq ft) at 4 inches deep requires about 4.9 cubic yards, or roughly 7 tons of crushed stone. At $40/ton delivered, expect to pay about $280 for the gravel plus a delivery fee.
How deep should gravel be for a driveway?
Residential driveways typically need 4 inches of gravel over a well-compacted base. For areas with heavy truck traffic or soft soil, use 6 inches. Apply in 2–3 inch layers and compact each layer before adding the next.