Tons of Crushed Stone per 100 Feet of 20 ft Road
Tons of crushed stone per 100 feet of 20 foot road: about 35 tons at 4 inches deep. The strip is 20 ft × 100 ft = 2,000 square feet. On a job this long, half an inch of extra depth adds a lot of tons.
Volume and tonnage calculator →Tons by depth
| Depth | Tons | Truckloads (~14 t) |
|---|---|---|
| 3 in | 26 | 2 |
| 4 in | 35 | 3 |
| 6 in | 52 | 4 |
| 8 in | 69 | 5 |
The math
- Area: 20 × 100 = 2,000 sq ft.
- Volume at 4 in: 2,000 × 0.333 = 667 cu ft (25 cubic yards).
- × 1.4 tons per yard = 35 tons.
Building a road this width
At 20 feet wide, two cars can meet with care. Crushed stone has fractured faces, so the pieces interlock when compacted. That is why it holds a driveway or pad shape better than round stone of the same size. Crown the surface so water sheds to ditches on both sides.
Practical notes
- Phasing. Large tonnages are delivered over days; schedule spreading and compaction to keep up with trucks.
- Waste. Allow 5 to 10 percent.
- Hauling. Distance from the quarry or plant often costs as much as the material on long jobs; see asphalt hauling cost per ton.
Check other sizes with the volume and tonnage calculator.
Where crushed stone fits
Best suited to:
- 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 20x25 area at 4 inches takes about 8.6 tons.
- Weight used here: about 1.4 tons per cubic yard.
Mistakes that throw off the order
- 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.
- Using inches as if they were feet. Depth has to be divided by 12 before you multiply; skipping that step inflates the order twelvefold.
- Ordering exactly the math. Uneven ground and spillage nearly always need a little more than the flat calculation.
Questions people ask
How many tons of crushed stone per 100 feet of 20 ft road?
About 35 tons at 4 inches.
How many truckloads is that?
About 3 loads at roughly 14 tons each.
How many square feet is 100 feet of 20 ft road?
2,000 square feet.
Should I add extra for waste?
Yes, 5 to 10 percent is common.
Does this include the shoulders?
No. Measure shoulders and pullouts separately and add them.
Related guides
- How Many Tons of Gravel in a Dump Truck? Loads and Coverage
- Asphalt Hauling Cost Per Ton: What Drives the Delivered Price
- Crushed Stone vs Gravel: Differences and Best Uses
- Tons of Crushed Stone per 100 Feet of 18 ft Road
- Tons of Crushed Stone per Mile of 20 ft Road
As an Amazon Associate, AsphaltTons.com earns from qualifying purchases. Product links below are sponsored.