How Much #57 Stone for a 22x45 Driveway?

A 22 by 45 foot driveway is 990 square feet. How much #57 stone for a 22x45 driveway depends on depth: at 4 inches it is about 12.22 cubic yards or 16.5 tons. Suppliers usually sell by the ton, so the tonnage is the number to give them.

Volume and tonnage calculator →

The math for a 22x45 driveway

Area: 22 × 45 = 990 sq ft.
Depth in feet: 4 ÷ 12 = 0.333 ft.
Cubic feet: 990 × 0.333 = 330.0 cu ft.
Cubic yards: ÷ 27 = 12.22 yd³.
Tons: × 1.35 = 16.5 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	6.11	8.2	9.1
3 in	9.17	12.4	13.6
4 in	12.22	16.5	18.2
6 in	18.33	24.8	27.2

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. 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. 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. 18.2 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.

Good and poor uses for #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 8x16 area at 2 inches takes about 1.1 tons.
Weight used here: about 1.35 tons per cubic yard.

Common estimating mistakes

Using inches as if they were feet. Depth has to be divided by 12 before you multiply; skipping that step inflates the order twelvefold.
Forgetting that compaction shrinks loose material. A loose 4-inch spread of a dense-graded stone may finish closer to 3 inches after rolling.
Ordering exactly the math. Uneven ground and spillage nearly always need a little more than the flat calculation.
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 22x45 driveway?

About 16.5 tons at 4 inches deep, or 18.2 tons with 10 percent extra.

How many cubic yards is a 22x45 driveway at 4 inches?

About 12.22 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 22x45?

990 square feet.

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