How Much #57 Stone for a 10x20 Shed Base?
How much #57 stone for a 10x20 shed base: at 4 inches deep you need about 2.47 cubic yards, which is roughly 3.3 tons at 1.35 tons per yard. The shed base covers 200 square feet, so every inch of depth adds about 0.62 yards.
Volume and tonnage calculator →The math for a 10x20 shed base
- Area: 10 × 20 = 200 sq ft.
- Depth in feet: 4 ÷ 12 = 0.333 ft.
- Cubic feet: 200 × 0.333 = 66.7 cu ft.
- Cubic yards: ÷ 27 = 2.47 yd³.
- Tons: × 1.35 = 3.3 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 | 1.23 | 1.7 | 1.8 |
| 3 in | 1.85 | 2.5 | 2.8 |
| 4 in | 2.47 | 3.3 | 3.7 |
| 6 in | 3.70 | 5.0 | 5.5 |
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. 3.7 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
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 12x24 area at 2 inches takes about 2.4 tons.
- Weight used here: about 1.35 tons per cubic yard.
Common estimating mistakes
- Measuring only the main rectangle. Aprons, turnouts and curved edges add real square footage.
- 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.
- Using inches as if they were feet. Depth has to be divided by 12 before you multiply; skipping that step inflates the order twelvefold.
Questions people ask
How many tons of #57 stone for a 10x20 shed base?
About 3.3 tons at 4 inches deep, or 3.7 tons with 10 percent extra.
How many cubic yards is a 10x20 shed base at 4 inches?
About 2.47 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 10x20?
200 square feet.
Related guides
- Number 57 Stone: Size, Weight, Uses, and Coverage
- Tons to Cubic Yards for Gravel: Conversion Chart
- How Many Tons of Gravel in a Dump Truck? Loads and Coverage
- How Much Does a Ton of Gravel Cover? Depth Chart
- How Much #57 Stone for a 10x14 Shed Base?
- How Much #57 Stone for a 10x16 Shed Base?
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