How Much #57 Stone for a 16x100 Driveway?

How much #57 stone for a 16x100 driveway: at 4 inches deep you need about 19.75 cubic yards, which is roughly 26.7 tons at 1.35 tons per yard. The driveway covers 1,600 square feet, so every inch of depth adds about 4.94 yards.

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The math for a 16x100 driveway

Area: 16 × 100 = 1,600 sq ft.
Depth in feet: 4 ÷ 12 = 0.333 ft.
Cubic feet: 1,600 × 0.333 = 533.3 cu ft.
Cubic yards: ÷ 27 = 19.75 yd³.
Tons: × 1.35 = 26.7 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	9.88	13.3	14.7
3 in	14.81	20.0	22.0
4 in	19.75	26.7	29.3
6 in	29.63	40.0	44.0

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. 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. 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. 29.3 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

Works well for:

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

Think twice 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 10x20 area at 3 inches takes about 2.5 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.
Ordering exactly the math. Uneven ground and spillage nearly always need a little more than the flat calculation.
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.

Questions people ask

How many tons of #57 stone for a 16x100 driveway?

About 26.7 tons at 4 inches deep, or 29.3 tons with 10 percent extra.

How many cubic yards is a 16x100 driveway at 4 inches?

About 19.75 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 16x100?

1,600 square feet.

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