How Much Crusher Run for a 18x50 Driveway?

How much crusher run for a 18x50 driveway is a quick volume problem. 900 square feet at 4 inches comes to 11.11 cubic yards. Crusher run usually weighs about 1.5 to 1.7 compacted tons per cubic yard, so plan on roughly 17.2 tons.

Volume and tonnage calculator →

The math for a 18x50 driveway

Area: 18 × 50 = 900 sq ft.
Depth in feet: 4 ÷ 12 = 0.333 ft.
Cubic feet: 900 × 0.333 = 300.0 cu ft.
Cubic yards: ÷ 27 = 11.11 yd³.
Tons: × 1.55 = 17.2 tons.

The volume and tonnage calculator does this for any size.

Crusher run needed by depth

Depth	Cubic yards	Tons (approx.)	Tons +10%
3 in	8.33	12.9	14.2
4 in	11.11	17.2	18.9
6 in	16.67	25.8	28.4
8 in	22.22	34.4	37.9

About crusher run

Crusher run (also sold as crush and run, dense-grade aggregate or QP in some regions) mixes stone with stone dust. It compacts into a firm, nearly solid layer, which makes it the usual base under pavers, asphalt and gravel drives. Ask your supplier for their own tons-per-yard figure, since stone source and moisture shift it.

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. 18.9 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 crusher run

Works well for:

Base under asphalt, pavers or concrete
Gravel drives that need a firm, packed surface
Shed pads and equipment pads

Less suited to:

Drainage layers, since the fines slow water
Decorative beds
Spots where you want water to soak straight through

Quick reference numbers

Per inch over 100 sq ft: about 0.48 tons of crusher run (0.31 cubic yards).
Per inch over 1,000 sq ft: about 4.8 tons.
Another size for comparison: a 8x16 area at 2 inches takes about 1.2 tons.
Weight used here: about 1.55 tons per cubic yard.

Common estimating mistakes

Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.
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.
Ignoring the base. A thin surface layer over soft soil fails early no matter how much material is on top.

Questions people ask

How many tons of crusher run for a 18x50 driveway?

About 17.2 tons at 4 inches deep, or 18.9 tons with 10 percent extra.

How many cubic yards is a 18x50 driveway at 4 inches?

About 11.11 cubic yards.

How much does a cubic yard of crusher run weigh?

Usually around 1.5 to 1.7 compacted tons, depending on stone size, fines and moisture.

How deep should crusher run be for a driveway?

The table above shows 3 to 8 inches. Shallower depths suit top dressing; deeper depths suit new installs and heavier use.

How many square feet is 18x50?

900 square feet.

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