How Much #57 Stone for a 18x250 Driveway?

How much #57 stone for a 18x250 driveway: at 4 inches deep you need about 55.56 cubic yards, which is roughly 75.0 tons at 1.35 tons per yard. The driveway covers 4,500 square feet, so every inch of depth adds about 13.89 yards.

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: × 1.35 = 75.0 tons.

The volume and tonnage calculator does this for any size.

#57 stone needed by depth

Depth	Cubic yards	Tons (approx.)	Tons +10%
2 in	27.78	37.5	41.2
3 in	41.67	56.2	61.9
4 in	55.56	75.0	82.5
6 in	83.33	112.5	123.8

About #57 stone

Since #57 is washed and open-graded, it moves a little underfoot. Many installers put it over a compacted base of a dense-graded stone rather than straight on soil. 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. Since the driveway carries car and truck traffic, a little extra depth is cheap insurance.

Ordering tips

Round up. Compaction and uneven ground eat material. Adding about 10 percent is common.
Delivery size. 82.5 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 #57 stone

Best suited to:

French drains and drainage layers
The top course of a gravel driveway
Under sheds where water needs to drain away

Less suited to:

A standalone base, since it does not pack hard without fines
Paver setting beds
Walk paths meant for strollers or wheelchairs

Quick reference numbers

Per inch over 100 sq ft: about 0.42 tons of #57 stone (0.31 cubic yards).
Per inch over 1,000 sq ft: about 4.2 tons.
Another size for comparison: a 20x25 area at 2 inches takes about 4.2 tons.
Weight used here: about 1.35 tons per cubic yard.

Mistakes that throw off the order

Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.
Mixing up cubic yards and tons. Yards are volume, tons are weight; convert with the product’s weight 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.
Measuring only the main rectangle. Aprons, turnouts and curved edges add real square footage.

Questions people ask

How many tons of #57 stone for a 18x250 driveway?

About 75.0 tons at 4 inches deep, or 82.5 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 #57 stone weigh?

Usually around 1.3 to 1.45 tons, depending on stone size, fines and moisture.

How deep should #57 stone be for a driveway?

The table above shows 2 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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