Crushed stone calculator
Enter the length, width, and depth of the area you are covering. This tool estimates tons of angular crushed stone (like #57 stone), commonly used under slabs, in drain fields, and as a driveway base, and includes a 10 percent waste allowance.
Your dimensions
Tons needed
1.9
Estimated cost: $58 to $106
Prices are typical ranges as of June 2026. Your local price will vary.
Assumptions
- •Uses a typical loose bulk density of 105 lb per cubic foot for angular crushed stone (e.g. #57 stone).
- •Estimates loose material as delivered, before compaction.
- •Price range is a typical bulk yard/quarry range and excludes delivery fees.
Questions this calculator answers
How much crushed stone do I need for a 10 by 10 foot area at 4 inches deep?
About 1.75 tons before waste, or 1.9 tons with the typical 10 percent waste allowance. That is 100 square feet times 4 inches of depth, or 33.3 cubic feet, divided by 27 to get 1.23 cubic yards, times about 1.4 tons per cubic yard for crushed stone at 105 pounds per cubic foot.
What is #57 crushed stone used for?
#57 stone is a common angular crushed stone size used as a base under concrete slabs, in drainage beds around footings, and as a driveway base layer, since its angular shape locks together and compacts well.
How is crushed stone different from gravel?
Crushed stone is mechanically broken and angular, while gravel is naturally rounded by water and weather. Angular stone interlocks and compacts more firmly, which is why it is preferred under slabs and driveways.
How deep should a crushed stone base be under a concrete slab?
4 inches is a common base depth under a residential slab, though local code and soil conditions can call for more. Check your local building requirements before pouring.
Does crushed stone need to be compacted?
Yes, especially as a base layer. Compacting in thin lifts of 2 to 4 inches gives a firmer, more even base than dumping the full depth at once. This calculator estimates loose material volume before compaction.