Tons of Asphalt per 100 Feet of 18 ft Road

Tons of asphalt per 100 feet of 18 foot road: about 33 tons at 3 inches compacted. The strip is 18 ft × 100 ft = 1,800 square feet. On a job this long, half an inch of extra depth adds a lot of tons.

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Tons by depth

Depth	Tons	Truckloads (~14 t)
2 in	22	2
3 in	33	3
4 in	44	4

The math

Area: 18 × 100 = 1,800 sq ft.
Volume at 3 in: 1,800 × 0.250 = 450 cu ft.
× 145 lb ÷ 2,000 = 33 tons.

Road section basics

A 18-foot width allows two vehicles to pass carefully. Paved roads sit on a compacted aggregate base, ordered separately from the asphalt. 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 asphalt tonnage calculator.

When to choose asphalt

Best suited to:

Driveways, parking pads and private lanes that need a smooth, sealed surface
Overlays on old pavement that is cracked but still structurally sound
Areas where snow will be plowed, since a paved surface does not throw stone

Less suited to:

Ground that stays soft or wet, unless the base and drainage are fixed first
Very small patches, where bagged cold patch is often simpler
Jobs in cold weather, since hot mix needs warm temperatures to compact properly

Quick reference numbers

Per inch over 100 sq ft: about 0.62 tons of asphalt (0.31 cubic yards).
Per inch over 1,000 sq ft: about 6.2 tons.
Another size for comparison: a 10x20 area at 2 inches takes about 2.5 tons.
Weight used here: about 2.0 tons per cubic yard (roughly 145 lb per compacted cubic foot).

Mistakes that throw off the order

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.
Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.
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 asphalt per 100 feet of 18 ft road?

About 33 tons at 3 inches.

How many truckloads is that?

About 3 loads at roughly 14 tons each.

How many square feet is 100 feet of 18 ft road?

1,800 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.

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