Tons of Road Base per Mile of 28 ft Road
Tons of road base per mile of 28 foot road: about 4,107 tons at 6 inches deep. The strip is 28 ft × 5,280 ft = 147,840 square feet. Shoulders, pullouts and turnarounds add to the total; measure them separately.
Volume and tonnage calculator →Tons by depth
| Depth | Tons | Truckloads (~14 t) |
|---|---|---|
| 3 in | 2,053 | 147 |
| 4 in | 2,738 | 196 |
| 6 in | 4,107 | 294 |
| 8 in | 5,476 | 392 |
The math
- Area: 28 × 5,280 = 147,840 sq ft.
- Volume at 6 in: 147,840 × 0.500 = 73,920 cu ft (2,738 cubic yards).
- × 1.5 tons per yard = 4,107 tons.
Road section basics
At 28 feet wide, this is a two-lane road width. Road base (also called base rock, ABC, or Class 2 base in different states) is a graded mix of stone and fines made to compact into a load-bearing layer. 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.
Good and poor uses for road base
Good uses:
- Base under asphalt and concrete
- Gravel roads and drives
- Equipment and shed pads
Think twice for:
- Drainage layers
- Decorative surfaces
- Surfaces that will stay uncompacted
Quick reference numbers
- Per inch over 100 sq ft: about 0.46 tons of road base (0.31 cubic yards).
- Per inch over 1,000 sq ft: about 4.6 tons.
- Another size for comparison: a 20x25 area at 4 inches takes about 9.3 tons.
- Weight used here: about 1.5 tons per cubic yard.
Common estimating mistakes
- Forgetting that compaction shrinks loose material. A loose 4-inch spread of a dense-graded stone may finish closer to 3 inches after rolling.
- 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.
- Assuming every supplier uses the same weight. Two yards selling the same product name can quote different tons per yard.
Questions people ask
How many tons of road base per mile of 28 ft road?
About 4,107 tons at 6 inches.
How many truckloads is that?
About 294 loads at roughly 14 tons each.
How many square feet is mile of 28 ft road?
147,840 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
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