Tons of Gravel per Mile of 18 ft Road

Tons of gravel per mile of 18 foot road: about 1,643 tons at 4 inches deep. The strip is 18 ft × 5,280 ft = 95,040 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	1,232	88
4 in	1,643	118
6 in	2,464	176
8 in	3,285	235

The math

Area: 18 × 5,280 = 95,040 sq ft.
Volume at 4 in: 95,040 × 0.333 = 31,680 cu ft (1,173 cubic yards).
× 1.4 tons per yard = 1,643 tons.

Building a road this width

A 18-foot width allows two vehicles to pass carefully. Plain gravel is a loose term. Yards use it for rounded bank or river stone as well as for crushed rock, so ask whether the load is washed, crushed or a mix before you lock in a tonnage. 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.

When to choose gravel

Best suited to:

Rural driveways and lanes where low upfront cost matters
Drainage areas and around downspouts
Temporary access while a site is under construction

Think twice for:

Steep slopes, where loose stone washes downhill
Spots plowed often, since plows push gravel into the lawn
Areas next to doors, because stone tracks inside

Quick reference numbers

Per inch over 100 sq ft: about 0.43 tons of gravel (0.31 cubic yards).
Per inch over 1,000 sq ft: about 4.3 tons.
Another size for comparison: a 20x25 area at 3 inches takes about 6.5 tons.
Weight used here: about 1.4 tons per cubic yard.

Where estimates go wrong

Measuring only the main rectangle. Aprons, turnouts and curved edges add real square footage.
Forgetting that compaction shrinks loose material. A loose 4-inch spread of a dense-graded stone may finish closer to 3 inches after rolling.
Assuming every supplier uses the same weight. Two yards selling the same product name can quote different tons per yard.
Using inches as if they were feet. Depth has to be divided by 12 before you multiply; skipping that step inflates the order twelvefold.

Questions people ask

How many tons of gravel per mile of 18 ft road?

About 1,643 tons at 4 inches.

How many truckloads is that?

About 118 loads at roughly 14 tons each.

How many square feet is mile of 18 ft road?

95,040 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.

As an Amazon Associate, AsphaltTons.com earns from qualifying purchases. Product links below are sponsored.