Crushed Concrete Calculator
Enter the area and depth to get cubic yards and tons of crushed concrete. Replace the weight per yard with the figure from your supplier.
Last updated November 13, 2026
How to calculate crushed concrete
Crushed concrete is measured like gravel: volume = length × width × depth. Divide cubic feet by 27 for cubic yards, then multiply by the weight per cubic yard to get tons.
Example: a 12 ft × 30 ft base, 4 inches deep, is 120 cubic feet, or 4.44 cubic yards. At a planning figure of 1.4 tons per yard that is 6.2 tons.
Crushed concrete for 100 square feet
| Depth | Cubic yards | Tons at 1.4 tons/yd³ |
|---|---|---|
| 2 in | 0.62 | 0.86 |
| 3 in | 0.93 | 1.30 |
| 4 in | 1.23 | 1.73 |
| 6 in | 1.85 | 2.59 |
Where it is used
- As a compacted base under concrete slabs, pavers and driveways.
- As a driveway or parking surface.
- As fill where a firm, draining layer is needed.
Crushed concrete compacts tightly, so order about 10% extra. The weight per yard differs between suppliers, and the calculator lets you enter theirs.
Frequently asked questions
What is crushed concrete?
Old concrete that has been broken up and screened to size. It is used as a base under driveways, slabs and paths, much like gravel.
How much crushed concrete do I need?
Multiply length × width × depth in feet and divide by 27 for cubic yards, then multiply by the weight per yard from your supplier.
How much does a yard of crushed concrete weigh?
It varies with the size of the pieces and the moisture. Ask the supplier for their figure and enter it in the calculator.