Crushed Stone Calculator
Calculate cubic yards and tons of crushed stone or crusher run for bases, driveways, and drainage.
Results
Visualization
How It Works
Crushed stone (also called crusher run) is mechanically broken rock with angular edges that lock together when compacted. It is the standard base material under concrete slabs, asphalt driveways, patios, and retaining walls.
The Formula
Volume (cu ft) = Length x Width x Depth / 12
Cubic Yards = Volume / 27
Tons = Cubic Yards x 1.5
Cubic Yards = Volume / 27
Tons = Cubic Yards x 1.5
Variables
- L — Length of the area in feet
- W — Width of the area in feet
- D — Desired depth in inches
- 1.5 — Approximate weight of crushed stone in tons per cubic yard
Example
A 20 ft x 10 ft patio base at 4 inches deep needs 66.7 cu ft = 2.47 cubic yards = 3.70 tons. At $45/ton that costs about $167.
Tips
- Crusher run (a mix of stone dust and crushed stone) compacts into an extremely firm base.
- Compact crushed stone in 2-inch lifts with a plate compactor for best results.
- Use #57 stone (3/4 inch) for drainage applications and #411 crusher run for bases.
- Crushed stone settles about 15-20% after compaction, so order extra accordingly.
- For driveways, plan 4-6 inches of crushed stone base topped with 2-3 inches of surface gravel.