How Much Asphalt Millings for a 18x250 Driveway?

How much asphalt millings for a 18x250 driveway is a quick volume problem. 4,500 square feet at 4 inches comes to 55.56 cubic yards. Asphalt millings usually weighs about 1.2 to 1.4 loose tons per cubic yard, so plan on roughly 72.2 tons.

Volume and tonnage calculator →

The math for a 18x250 driveway

Area: 18 × 250 = 4,500 sq ft.
Depth in feet: 4 ÷ 12 = 0.333 ft.
Cubic feet: 4,500 × 0.333 = 1,500.0 cu ft.
Cubic yards: ÷ 27 = 55.56 yd³.
Tons: × 1.3 = 72.2 tons.

The volume and tonnage calculator does this for any size.

Asphalt millings needed by depth

Depth	Cubic yards	Tons (approx.)	Tons +10%
3 in	41.67	54.2	59.6
4 in	55.56	72.2	79.4
6 in	83.33	108.3	119.2

About asphalt millings

Millings vary by source: some loads are fine and uniform, others carry chunks. Ask the supplier for a screened product if you want a smoother finish, and check local rules, since some areas restrict their use near water. Weight per yard is a planning number; the scale ticket at the yard is the real one.

Preparing the driveway

Strip sod and soft topsoil, grade for drainage and compact the subgrade before any stone goes down. Gravel drives last longer with a compacted base layer under the top stone and a slight crown so water runs off. This driveway sees car and truck traffic, so match the depth to that load rather than to the minimum.

Ordering tips

Round up. Compaction and uneven ground eat material. Adding about 10 percent is common.
Delivery size. 79.4 tons may take more than one typical dump truck load; small loads may carry a delivery fee. See how many tons of gravel in a dump truck.
Bulk vs bags. At this size bulk delivery is usually the practical choice.
Where it drops. Have the truck dump as close to the driveway as firm ground allows.

Good and poor uses for asphalt millings

Best suited to:

Rural driveways and farm lanes
Parking areas where a dust-free surface is wanted
Low-cost base under a future paved surface

Think twice for:

Areas near wells or streams where local rules limit them
Decorative or barefoot areas
Jobs needing a uniform, clean look

Quick reference numbers

Per inch over 100 sq ft: about 0.40 tons of asphalt millings (0.31 cubic yards).
Per inch over 1,000 sq ft: about 4.0 tons.
Another size for comparison: a 10x20 area at 4 inches takes about 3.2 tons.
Weight used here: about 1.3 tons per cubic yard.

Common estimating mistakes

Assuming every supplier uses the same weight. Two yards selling the same product name can quote different tons per yard.
Ignoring the base. A thin surface layer over soft soil fails early no matter how much material is on top.
Forgetting that compaction shrinks loose material. A loose 4-inch spread of a dense-graded stone may finish closer to 3 inches after rolling.
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 millings for a 18x250 driveway?

About 72.2 tons at 4 inches deep, or 79.4 tons with 10 percent extra.

How many cubic yards is a 18x250 driveway at 4 inches?

About 55.56 cubic yards.

How much does a cubic yard of asphalt millings weigh?

Usually around 1.2 to 1.4 loose tons, depending on stone size, fines and moisture.

How deep should asphalt millings be for a driveway?

The table above shows 3 to 6 inches. Shallower depths suit top dressing; deeper depths suit new installs and heavier use.

How many square feet is 18x250?

4,500 square feet.

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