How Much #57 Stone for a 12x120 Driveway?

How much #57 stone for a 12x120 driveway: at 4 inches deep you need about 17.78 cubic yards, which is roughly 24.0 tons at 1.35 tons per yard. The driveway covers 1,440 square feet, so every inch of depth adds about 4.44 yards.

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The math for a 12x120 driveway

Area: 12 × 120 = 1,440 sq ft.
Depth in feet: 4 ÷ 12 = 0.333 ft.
Cubic feet: 1,440 × 0.333 = 480.0 cu ft.
Cubic yards: ÷ 27 = 17.78 yd³.
Tons: × 1.35 = 24.0 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	8.89	12.0	13.2
3 in	13.33	18.0	19.8
4 in	17.78	24.0	26.4
6 in	26.67	36.0	39.6

About #57 stone

#57 stone is a clean crushed stone in roughly the 1/2 to 1 inch range with very few fines. It drains fast, which suits drainage layers and the top of a gravel drive, but it does not pack into a hard crust by itself. 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. 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. 26.4 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 #57 stone

Good uses:

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

Poor fit for:

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 8x16 area at 3 inches takes about 1.6 tons.
Weight used here: about 1.35 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.
Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.
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.

Questions people ask

How many tons of #57 stone for a 12x120 driveway?

About 24.0 tons at 4 inches deep, or 26.4 tons with 10 percent extra.

How many cubic yards is a 12x120 driveway at 4 inches?

About 17.78 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 12x120?

1,440 square feet.

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