Crushed Stone Calculator
Use this crushed stone calculator to estimate how much stone or gravel you need for a rectangular or circular area. It follows the Omni workflow of converting plan area and depth into cubic yards, then adding waste and converting the result to tons. That makes it helpful for driveways, base layers, garden areas, and general aggregate planning.
Result
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What This Crushed Stone Calculator Helps You Do
Use this crushed stone calculator to estimate how much stone or gravel you need for a rectangular or circular area. It follows the Omni workflow of converting plan area and depth into cubic yards, then adding waste and converting the result to tons. That makes it helpful for driveways, base layers, garden areas, and general aggregate planning.
How to Calculate Crushed Stone Calculator
- Choose the surface shape - Select rectangular or circular so the correct area equation is used.
- Enter the dimensions and depth - Use the plan dimensions and the required stone depth in consistent units.
- Add wastage - A waste allowance helps cover compaction, spillage, and leveling losses.
- Review cubic yards and tons - The calculator shows both the geometric volume and the approximate tonnage.
Crushed Stone Calculator Formula
| Symbol | Definition | Unit |
|---|---|---|
| length | Area length or major dimension | ft |
| width | Area width or minor dimension | ft |
| depth | Stone depth | ft |
| waste | Extra percentage allowance | % |
Worked Examples
- Length: 20 ft
- Width: 12 ft
- Depth: 0.25 ft
- Waste: 10%
Result: The calculator returns cubic yards first and then converts to tons using the Omni factor
That makes it easier to compare the estimate with suppliers that sell by yard or by ton.
How to Interpret Your Results
| Range | Meaning | Action |
|---|---|---|
| Lower yardage | Small area or shallow depth | This can often be delivered as a small loose load or bagged material. |
| Higher yardage | Large area or deeper layer | Verify whether your supplier quotes by cubic yard, ton, or truckload. |
| Higher waste allowance | More conservative material planning | Useful for uneven subgrade or heavily compacted base work. |
Frequently Asked Questions
Sources
Last reviewed: March 14, 2026