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How Much #57 Stone for a 16x24 Shed Base?

How much #57 stone for a 16x24 shed base is a quick volume problem. 384 square feet at 4 inches comes to 4.74 cubic yards. #57 stone usually weighs about 1.3 to 1.45 tons per cubic yard, so plan on roughly 6.4 tons.

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The math for a 16x24 shed base

  1. Area: 16 × 24 = 384 sq ft.
  2. Depth in feet: 4 ÷ 12 = 0.333 ft.
  3. Cubic feet: 384 × 0.333 = 128.0 cu ft.
  4. Cubic yards: ÷ 27 = 4.74 yd³.
  5. Tons: × 1.35 = 6.4 tons.

The volume and tonnage calculator does this for any size.

#57 stone needed by depth

DepthCubic yardsTons (approx.)Tons +10%
2 in2.373.23.5
3 in3.564.85.3
4 in4.746.47.0
6 in7.119.610.6

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. If the yard sells by the cubic yard instead of the ton, use the cubic-yard column directly.

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. For a shed floor frame, 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. 7.0 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 this size bulk delivery is usually the practical choice.
  • Where it drops. Have the truck dump as close to the shed base 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 4 inches takes about 2.1 tons.
  • Weight used here: about 1.35 tons per cubic yard.

Mistakes that throw off the order

  • Ignoring the base. A thin surface layer over soft soil fails early no matter how much material is on top.
  • Using inches as if they were feet. Depth has to be divided by 12 before you multiply; skipping that step inflates the order twelvefold.
  • 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.

Questions people ask

How many tons of #57 stone for a 16x24 shed base?

About 6.4 tons at 4 inches deep, or 7.0 tons with 10 percent extra.

How many cubic yards is a 16x24 shed base at 4 inches?

About 4.74 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 16x24?

384 square feet.

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