How Much Crusher Run for a 18x40 Driveway?

How much crusher run for a 18x40 driveway is a quick volume problem. 720 square feet at 4 inches comes to 8.89 cubic yards. Crusher run usually weighs about 1.5 to 1.7 compacted tons per cubic yard, so plan on roughly 13.8 tons.

Volume and tonnage calculator →

The math for a 18x40 driveway

Area: 18 × 40 = 720 sq ft.
Depth in feet: 4 ÷ 12 = 0.333 ft.
Cubic feet: 720 × 0.333 = 240.0 cu ft.
Cubic yards: ÷ 27 = 8.89 yd³.
Tons: × 1.55 = 13.8 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	6.67	10.3	11.4
4 in	8.89	13.8	15.2
6 in	13.33	20.7	22.7
8 in	17.78	27.6	30.3

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. If the yard sells by the cubic yard instead of the ton, use the cubic-yard column directly.

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. For car and truck traffic, the depths in the table above are a reasonable starting range.

Ordering tips

Round up. Compaction and uneven ground eat material. Adding about 10 percent is common.
Delivery size. 15.2 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.

When to choose crusher run

Works well for:

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

Poor fit for:

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 4 inches takes about 2.4 tons.
Weight used here: about 1.55 tons per cubic yard.

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.
Mixing up cubic yards and tons. Yards are volume, tons are weight; convert with the product’s weight per yard.
Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.

Questions people ask

How many tons of crusher run for a 18x40 driveway?

About 13.8 tons at 4 inches deep, or 15.2 tons with 10 percent extra.

How many cubic yards is a 18x40 driveway at 4 inches?

About 8.89 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 18x40?

720 square feet.

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