How Much #57 Stone for a 6x8 Shed Base?

How much #57 stone for a 6x8 shed base is a quick volume problem. 48 square feet at 4 inches comes to 0.59 cubic yards. #57 stone usually weighs about 1.3 to 1.45 tons per cubic yard, so plan on roughly 0.8 tons.

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The math for a 6x8 shed base

Area: 6 × 8 = 48 sq ft.
Depth in feet: 4 ÷ 12 = 0.333 ft.
Cubic feet: 48 × 0.333 = 16.0 cu ft.
Cubic yards: ÷ 27 = 0.59 yd³.
Tons: × 1.35 = 0.8 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	0.30	0.4	0.4
3 in	0.44	0.6	0.7
4 in	0.59	0.8	0.9
6 in	0.89	1.2	1.3

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. Ask your supplier for their own tons-per-yard figure, since stone source and moisture shift it.

Preparing the shed base

Level the footprint, extend the stone a foot or so beyond the shed walls for drip and drainage, and compact in lifts. A timber or block border holds the pad shape. This shed base sees a shed floor frame, 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. 0.9 tons fits in a single 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 about 0.8 tons this job is small enough that bagged material could work; a 0.5 cubic foot bag holds about 1/54 of a yard, so compare the bag count with a bulk minimum.
Where it drops. Have the truck dump as close to the shed base as firm ground allows.

Where #57 stone fits

Best suited to:

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 14x28 area at 4 inches takes about 6.5 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.
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.
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 6x8 shed base?

About 0.8 tons at 4 inches deep, or 0.9 tons with 10 percent extra.

How many cubic yards is a 6x8 shed base at 4 inches?

About 0.59 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 shed base?

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 6x8?

48 square feet.

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