How Does This Calculator Work?
The calculator converts your area and depth into cubic feet, then divides by 27 to convert to cubic yards — the standard unit gravel suppliers use for bulk delivery.
Gravel is typically sold by the cubic yard or by weight in tons. This calculator estimates the volume you need based on the area you're covering and how deep you want the gravel layer.
Example Calculation
Driveway Base Example
A 300 sq ft driveway area, 4 inches deep.
(300 × (4/12)) ÷ 27 ≈ 3.70 cubic yards.
Tips
A driveway base layer is typically 4–6 inches deep. If your supplier sells gravel by weight instead of volume, ask them for the conversion factor for your specific gravel type, since density varies by material.