How Many Tons of Asphalt for a 18x150 Driveway?

How many tons of asphalt for a 18x150 driveway comes down to thickness. The area is 18 × 150 = 2,700 square feet. Using a common planning density of about 145 pounds per cubic foot for compacted hot mix, a 2-inch mat needs roughly 32.6 tons and a 3-inch mat roughly 48.9 tons, before any allowance for waste or uneven base.

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Step-by-step math for 18x150

Area: 18 ft × 150 ft = 2,700 sq ft.
Thickness in feet: 3 inches ÷ 12 = 0.25 ft.
Volume: 2,700 × 0.25 = 675 cubic feet.
Weight: 675 × 145 lb = 97,875 lb.
Tons: divide by 2,000 = 48.9 tons.

Swap in your own thickness and the plant’s stated density if you have it. The asphalt tonnage calculator runs the same steps.

Tons at common thicknesses

Compacted thickness	Cubic feet	Tons (145 lb/ft³)	Tons +5%
2 in	450	32.6	34.3
2.5 in	562	40.8	42.8
3 in	675	48.9	51.4
4 in	900	65.2	68.5

Choosing a thickness

Residential driveways are commonly paved at 2 to 3 inches of compacted surface over a compacted stone base. Overlays on sound old pavement are often 1.5 to 2 inches. If heavy trucks, an RV or a delivery vehicle will use the driveway, many contractors step up to 3 or 4 inches total, sometimes as a binder course plus a surface course.

Ordering and trucks

Hot mix is sold by the ton and arrives in dump trucks that commonly haul 10 to 20 tons each. For 48.9 tons at 3 inches, figure roughly 4 loads at about 14 tons apiece. Ask the plant about minimums and the time the mix will hold heat on the haul. See how many tons in a truckload of asphalt for more on load sizes.

Things that change the tonnage

Uneven base. Low spots fill with extra mix. A base that is graded and compacted flat keeps the tonnage close to the math.
Edges and flares. Curved edges, a wider apron at the street or a turnaround add square footage. Measure those separately and add them in.
Density. Mixes typically range from about 140 to 150 lb per compacted cubic foot. Ask your plant for its number if you need tight figures.
Waste. Many estimators add 5 to 10 percent for handling, raking and thickness variation.

Pricing it out

Multiply your tonnage by the per-ton price your local plant or contractor quotes. Installed prices also cover base work, equipment and labor, so material tons are only part of the bid. See asphalt cost per ton for what goes into a quote.

Good and poor uses for asphalt

Good uses:

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

Poor fit for:

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 12x24 area at 2 inches takes about 3.6 tons.
Weight used here: about 2.0 tons per cubic yard (roughly 145 lb per compacted cubic foot).

Common estimating mistakes

Assuming every supplier uses the same weight. Two yards selling the same product name can quote different tons per yard.
Ordering exactly the math. Uneven ground and spillage nearly always need a little more than the flat calculation.
Ignoring the base. A thin surface layer over soft soil fails early no matter how much material is on top.
Mixing up cubic yards and tons. Yards are volume, tons are weight; convert with the product’s weight per yard.

Questions people ask

How many tons of asphalt for a 18x150 driveway at 2 inches?

About 32.6 tons of compacted asphalt, or around 34.3 tons with a 5 percent allowance.

How many tons for a 18x150 driveway at 3 inches?

About 48.9 tons at 145 lb per cubic foot.

How many square feet is a 18x150 driveway?

2,700 square feet, or about 300 square yards.

Does the stone base count in the asphalt tonnage?

No. The base is ordered separately, usually as crushed stone or road base by the ton. The base calculator handles that part.

What density should I use?

About 145 lb per cubic foot is a common planning figure for compacted hot mix. Your plant may give a slightly different number.

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