How Much #57 Stone for a 30x40 Pole Barn?
How much #57 stone for a 30x40 pole barn: about 30.0 tons for a 6-inch pad covering the 1,200 square foot footprint. Many builders extend the pad a foot or two past the walls, which adds material.
Volume and tonnage calculator →The math
- Area: 1,200.0 sq ft.
- Depth in feet: 6 ÷ 12 = 0.500 ft.
- Cubic yards: 1,200.0 × 0.500 ÷ 27 = 22.22 yd³.
- Tons: × about 1.35 tons per yard = 30.0 tons.
The crushed stone calculator does this for any size.
Related: How Much Gravel for a 30x40 Pole Barn?
#57 stone needed by depth
| Depth | Cubic yards | Tons of #57 stone | Tons +10% |
|---|---|---|---|
| 4 in | 14.81 | 20.0 | 22.0 |
| 6 in | 22.22 | 30.0 | 33.0 |
| 8 in | 29.63 | 40.0 | 44.0 |
| 12 in | 44.44 | 60.0 | 66.0 |
How deep the barn pad should be
Plan the pad around what the barn will hold. Hay and tools sit fine on 4 inches of compacted stone; tractors, trucks or a later slab pour justify 6 to 8 inches built up in compacted lifts.
Related: How Much Crushed Stone for a 30x40 Pole Barn?
Extending the pad past the walls
Adding 1 foot on every side makes the pad 32x42, or 1,344 sq ft. At 6 inches that is about 33.6 tons. A wider apron sheds water away from the posts and gives the eave drip a place to land.
Build it in layers
Remove sod and organic soil first. Compact the subgrade, then place and compact the stone in thin lifts. If the barn floor will be stone permanently, finish with a material that has fines so it packs firm.
Buying the stone
Most quarries and landscape yards deliver by the ton; ask whether there is a minimum and a delivery fee, and where the driver can dump without damaging your lawn. #57 is a washed stone of roughly 1/2 to 1 inch with few fines; it drains fast but stays a little loose on its own. Ask your supplier for their own tons-per-yard number, since stone source and moisture change it.
Questions people ask
How many tons of #57 stone for a 30x40 pole barn?
About 30.0 tons at 6 inches deep.
How many yards of #57 stone for a 30x40 pad?
About 22.22 cubic yards at 6 inches.
How deep should a pole barn gravel pad be?
About 4 inches for light use and 6 to 8 inches for vehicles or a future slab.
How many tons of #57 stone are in a cubic yard?
Roughly 1.35 tons for planning, but suppliers vary with stone size and moisture.
Do I need to compact it?
Yes for anything that carries weight. Compact in lifts of a few inches with a plate compactor.
Related guides
- Gravel for a Pole Barn Floor: Best Stone, Depth and Tons
- How Much Does a Ton of Gravel Cover? Depth Chart
- Tons to Cubic Yards for Gravel: Conversion Chart
- Crushed Stone vs Gravel: Differences and Best Uses
- Geotextile Fabric for Driveways: Woven vs Nonwoven and How Much You Need
- Compacting a Driveway Gravel Base in Lifts
- How Much #57 Stone for a 24x40 Pole Barn?
- How Much #57 Stone for a 30x30 Pole Barn?
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