How Much #57 Stone for a 40x40 Pole Barn?
A 40 by 40 pole barn covers 1,600 square feet. Spread 6 inches deep, the pad takes about 29.63 cubic yards, which is roughly 40.0 tons of #57 stone. That answers how much #57 stone for a 40x40 pole barn for a typical floor base.
Volume and tonnage calculator →The math
- Area: 1,600.0 sq ft.
- Depth in feet: 6 ÷ 12 = 0.500 ft.
- Cubic yards: 1,600.0 × 0.500 ÷ 27 = 29.63 yd³.
- Tons: × about 1.35 tons per yard = 40.0 tons.
The crushed stone calculator does this for any size.
Related: How Much Gravel for a 40x40 Pole Barn?
#57 stone needed by depth
| Depth | Cubic yards | Tons of #57 stone | Tons +10% |
|---|---|---|---|
| 4 in | 19.75 | 26.7 | 29.3 |
| 6 in | 29.63 | 40.0 | 44.0 |
| 8 in | 39.51 | 53.3 | 58.7 |
| 12 in | 59.26 | 80.0 | 88.0 |
Pole barn pad depth
A 4-inch layer works for storage and light use on firm soil. For equipment, vehicles or a future concrete floor, 6 to 8 inches of compacted stone is common, and soft ground may need more plus fabric underneath.
Related: How Much Crushed Stone for a 40x40 Pole Barn?
Extending the pad past the walls
Adding 1 foot on every side makes the pad 42x42, or 1,764 sq ft. At 6 inches that is about 44.1 tons. A wider apron sheds water away from the posts and gives the eave drip a place to land.
Layering the base
Strip topsoil, level and compact the subgrade, then spread stone in lifts of about 3 to 4 inches, compacting each. A coarser base topped with a finer, packable stone often makes the most solid floor.
Getting it delivered
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 40x40 pole barn?
About 40.0 tons at 6 inches deep.
How many yards of #57 stone for a 40x40 pad?
About 29.63 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.
Should I put landscape fabric under the stone?
On soft or clay soil, a woven geotextile keeps stone from sinking into the dirt and makes the layer last longer.
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 36x36 Pole Barn?
- How Much #57 Stone for a 36x48 Pole Barn?
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