How Much Crushed Stone for 100 Square Feet?
How much crushed stone for 100 square feet depends on depth. At 4 inches you need about 1.23 cubic yards, roughly 1.7 tons at 1.4 tons per yard. Going to 6 inches raises it to 2.6 tons.
Volume and tonnage calculator →Crushed stone for 100 sq ft by depth
| Depth | Cubic yards | Tons | Tons +10% |
|---|---|---|---|
| 2 in | 0.62 | 0.9 | 1.0 |
| 3 in | 0.93 | 1.3 | 1.4 |
| 4 in | 1.23 | 1.7 | 1.9 |
| 6 in | 1.85 | 2.6 | 2.9 |
Working it out
- 100 sq ft × (4 ÷ 12) ft = 33.3 cubic feet.
- ÷ 27 = 1.23 cubic yards.
- × 1.4 tons per yard = 1.7 tons.
About crushed stone
Most quarries sell crushed stone by a size number or a screen size. Clean crushed stone drains well; stone with fines packs harder but sheds water more slowly. Most suppliers will quote 1.35 to 1.5 tons per yard for this material.
Getting the order right
- Measure odd shapes in pieces. Split curves and L-shapes into rectangles and add them.
- Add a margin. About 10 percent covers compaction and low spots.
- Bulk or bags. Bulk delivery is the practical choice here.
- Prep first. Remove sod, compact the subgrade and set edging before the stone arrives.
Use the volume and tonnage calculator for any other size.
Where crushed stone fits
Good uses:
- Driveway top courses and parking pads
- Shed and hot tub bases
- Backfill behind walls when a clean size is used
Less suited to:
- Barefoot areas, since angular stone is rough
- Play areas
- Places that need a smooth rolling surface for wheels
Quick reference numbers
- Per inch over 100 sq ft: about 0.43 tons of crushed stone (0.31 cubic yards).
- Per inch over 1,000 sq ft: about 4.3 tons.
- Another size for comparison: a 14x28 area at 2 inches takes about 3.4 tons.
- Weight used here: about 1.4 tons per cubic yard.
Where estimates go wrong
- Forgetting that compaction shrinks loose material. A loose 4-inch spread of a dense-graded stone may finish closer to 3 inches after rolling.
- Mixing up cubic yards and tons. Yards are volume, tons are weight; convert with the product’s weight per yard.
- Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.
- Measuring only the main rectangle. Aprons, turnouts and curved edges add real square footage.
Questions people ask
How many tons of crushed stone for 100 square feet?
About 1.7 tons at 4 inches deep.
How many cubic yards of crushed stone for 100 square feet?
About 1.23 yards at 4 inches.
How much crushed stone for 100 square feet at 2 inches?
About 0.9 tons, or 0.62 cubic yards.
How much does a yard of crushed stone weigh?
About 1.35 to 1.5 tons.
Should I add extra?
Yes, about 10 percent is a common allowance.
Related guides
- How Much Does a Ton of Crushed Stone Cover?
- Tons to Cubic Yards for Gravel: Conversion Chart
- How Much Does a Ton of Gravel Cover? Depth Chart
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