Crushed Stone Calculator
Estimate the volume in cubic yards and total weight in tons of crushed stone or gravel required for driveways, pathways, or drainage yards.
Calculation Results
Total cubic yards of crushed stone needed, including waste.
Total weight of crushed stone needed in short tons (2,000 lbs).
How This Calculator Works
To use the Crushed Stone Calculator:
- Enter the length and width of the area to cover.
- Specify the depth of the stone layer (e.g. 2 to 3 inches for pedestrian pathways; 4 to 6 inches for driveways or patio subgrade bases).
- Enter the density of the specific crushed stone type. 1.4 tons/cu yd is standard for limestone gravel; use 1.3 for lighter volcanic stone.
- Add a waste allowance. 10% is recommended because stone compacts when rolled or tamped.
Formula & Calculations
Crushed stone volume is calculated by multiplying length, width, and depth together, converting to cubic yards, and adding a waste factor:
Volume (Cubic Yards) = ((Length × Width × Depth) / 27) × (1 + Waste / 100)
Weight is calculated by multiplying the cubic yard volume by the density of the material (expressed in tons per cubic yard):
Weight (Tons) = Volume (Cubic Yards) × Density
For standard crushed limestone or gravel, the industry average density is 1.4 tons per cubic yard.
Step-by-Step Calculation Examples
Typical Stone Pathway
A pathway measuring 30ft long by 10ft wide, filled with a 4-inch layer of crushed stone, assuming standard density (1.4 tons/cu yd) and 10% waste.
- length: 30
- width: 10
- depth: 4
- density: 1.4
- waste: 10
- volume_cu_yd: 4.07 cu yd
- tons_needed: 5.70 tons
Frequently Asked Questions
How much does a cubic yard of crushed stone weigh?
On average, one cubic yard of clean crushed stone weighs approximately 2,700 to 2,900 pounds, which is roughly 1.35 to 1.45 tons.
Why does crushed stone require a waste/compaction factor?
Crushed stone contains air gaps. When it is rolled, walked on, or compacted with a plate compactor, the pieces lock together and compress, reducing the volume by about 10% to 15%. Adding waste/compaction allowance ensures you don't run short.
What size crushed stone is best for a driveway?
For driveways, a combination of sizes is best. The base layer should be 3-to-4 inches of coarse 2-to-3 inch stone (like #3 stone), followed by a middle layer of 3 inches of 3/4-inch stone (like #57 stone), topped with a layer of fines/dust for packing.
What is the difference between crushed stone and gravel?
Crushed stone is man-made by breaking up large ledge rocks in crushing machines, resulting in sharp, jagged edges that lock together. Gravel occurs naturally and features rounded, smooth edges shaped by water erosion.
How deep should stone be for a patio base?
For standard residential brick or paver patios, a minimum sub-base of 4 inches of crushed run gravel (like QP or Item 4) is recommended, plus a 1-inch sand setting bed.