How many cubic yards of gravel do I need for a driveway?

A typical 2-car driveway (20×40 ft) with 4" depth needs: 20×40×(4/12)/27 = about 9.9 cubic yards (≈14 tons). Plan for delivery in 1-yard increments.

How many bags of gravel make a cubic yard?

1 cubic yard = 27 cubic feet. A 0.5 cubic foot bag = 54 bags per yard. Most stores sell 50-lb bags covering about 0.5 cubic feet at 2" depth.

Gravel Calculator — Cubic Yards & Tons

Quick answer: Enter length, width, and depth to calculate gravel in cubic yards and tons.

Calculate the amount of gravel, crushed stone, or rock needed for any project. Enter the area dimensions and desired depth to get cubic feet, cubic yards, and approximate tons.

Last reviewed: April 2026Report an error

Length (ft)

Width (ft)

Depth (in)

Cubic Yards

2.47 yd³

2.47 cubic yards — approximately 3.46 tons.

Cubic Feet

66.70

Cubic Yards

2.47

Tons

3.46

How to Use This Gravel Calculator

1Enter the area length and width in feet.
2Enter the desired depth in inches.
3Read cubic feet, cubic yards, and estimated tons.

Frequently Asked Questions

: A typical 2-car driveway (20×40 ft) with 4" depth needs: 20×40×(4/12)/27 = about 9.9 cubic yards (≈14 tons). Plan for delivery in 1-yard increments.
: 1 cubic yard = 27 cubic feet. A 0.5 cubic foot bag = 54 bags per yard. Most stores sell 50-lb bags covering about 0.5 cubic feet at 2" depth.

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Gravel Calculator — Cubic Yards & Tons

How to Use This Gravel Calculator

Frequently Asked Questions

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