How do I calculate tons of gravel?

Multiply length × width × depth in feet to get cubic feet, divide by 27 for cubic yards, then multiply by the material's density — about 1.4 tons per cubic yard for crushed stone.

How deep should a gravel driveway be?

Typically 4–6 inches of surface gravel over a compacted base; new driveways on soft soil often need 8–12 inches total in layers.

Free tool

Gravel calculator

Cubic yards, tons, and bags of gravel from area and depth.

Inputs

Length (ft)Width (ft)Depth (in)Density (tons/CY)Waste %

Estimated materials

Tons: 7.3 tons
Cubic yards: 5.19
Cubic feet: 140
0.5 CF bags: 280

Density varies by material — about 1.4 tons/CY for crushed stone and pea gravel, up to ~1.5 for crusher run. Compacted base may need 10–15% more. Estimate — verify before ordering.

Frequently asked

How do I calculate tons of gravel?: Multiply length × width × depth in feet to get cubic feet, divide by 27 for cubic yards, then multiply by the material's density — about 1.4 tons per cubic yard for crushed stone.
How deep should a gravel driveway be?: Typically 4–6 inches of surface gravel over a compacted base; new driveways on soft soil often need 8–12 inches total in layers.

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