Home Improvement

Gravel Calculator

Calculate how much gravel you need, in volume and weight.

Enter the length, width, and desired depth of your driveway or path to calculate the cubic yards and estimated weight of gravel needed.

Enter a valid length.
Enter a valid width.
Enter a valid depth.

Gravel Needed

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Estimated Weight

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How to Use This Tool

  1. Measure the length and width of the area in feet.
  2. Enter the desired depth of gravel in inches.
  3. Click Calculate to see the volume needed in cubic yards.

The Volume Formula

Cubic Yards = (Length × Width × Depth in inches) ÷ 324

This formula converts your area (length × width, in square feet) and depth (in inches) into cubic yards — the standard unit gravel is sold by. The constant 324 comes from converting cubic feet to cubic yards (÷27) combined with converting inches to feet (÷12).

Recommended Gravel Depth

Driveways typically need 4-6 inches of compacted gravel base, while walking paths often only need 2-3 inches.

Always Buy a Little Extra

Suppliers commonly recommend ordering 5-10% more than your calculated amount to account for settling, uneven ground, and spillage during placement.

Frequently Asked Questions

Why is gravel measured in cubic yards?

Cubic yards is the standard bulk measurement unit for gravel and similar bulk materials in the US, since it conveniently represents the volume typically delivered by truck.

Should I order extra material?

Yes, most suppliers and contractors recommend ordering 5-10% more than your calculated volume to account for uneven surfaces, settling, and waste during installation.

This calculator is provided for general informational and estimation purposes only. Results should not be treated as professional financial, tax, legal, medical, or engineering advice. Always verify critical calculations with a qualified professional or official source before making decisions.