Stone & Gravel Coverage Calculator
We recommend adding 10-15% for compaction and waste, especially for driveways.
How to Calculate Gravel and Stone
Calculating the right amount of gravel or crushed stone for your landscaping project or driveway is crucial to avoid multiple delivery fees or running short. The basic formula to find the volume is:
Length × Width × Depth = Volume
To use this formula, all measurements must be in the same unit (typically feet). Once you have the volume in cubic feet, you divide by 27 to get cubic yards, which is the standard unit used by suppliers.
The Importance of Compaction
When laying a driveway or a solid base, the stone will be compacted (either mechanically or over time). This means the loose volume delivered will shrink. It is highly recommended to add a 10% to 15% waste and compaction factor to your total estimate to ensure you have enough material to achieve your desired final depth.
Converting Cubic Yards to Tons
While volume (cubic yards) tells you how much space the material will fill, suppliers often sell stone by weight (tons). The conversion depends entirely on the density of the specific stone type.
| Stone Type | Estimated Tons per Cubic Yard |
|---|---|
| Crushed Stone (#57, etc.) | 1.35 - 1.40 tons |
| Pea Gravel | 1.30 tons |
| River Rock | 1.40 tons |
| Sand | 1.35 tons |
| Crushed Limestone | 1.20 tons |
Note: Densities can vary based on moisture content and the specific quarry. Always verify with your local supplier.
Popular Types of Landscaping Stone
Small, smooth, rounded stones typically 1/8" to 3/8" in size. Excellent for walkways, dog runs, and decorative landscaping. Not ideal for steep driveways as it tends to shift.
Angular, machine-crushed rock. The #57 size (about 3/4" to 1") is the standard for driveway surfaces and drainage projects because the angular edges lock together well.
Larger, smooth stones ranging from 1" to 3" or more. Primarily used for decorative dry creek beds, edging, and preventing soil erosion.