How Much #57 Stone Under a 12x16 Deck?
How much #57 stone under a 12x16 deck: about 2.4 tons at 3 inches deep. The area is 192 square feet, which is 1.78 cubic yards at that depth.
Volume and tonnage calculator →The math
- Area: 192.0 sq ft.
- Depth in feet: 3 ÷ 12 = 0.250 ft.
- Cubic yards: 192.0 × 0.250 ÷ 27 = 1.78 yd³.
- Tons: × about 1.35 tons per yard = 2.4 tons.
The crushed stone calculator does this for any size.
Related: How Much Pea Gravel Under a 12x16 Deck?
#57 stone needed by depth
| Depth | Cubic yards | Tons of #57 stone | Tons +10% |
|---|---|---|---|
| 2 in | 1.19 | 1.6 | 1.8 |
| 3 in | 1.78 | 2.4 | 2.6 |
| 4 in | 2.37 | 3.2 | 3.5 |
| 6 in | 3.56 | 4.8 | 5.3 |
Deck tips
Under a deck, stone is a weed and moisture barrier rather than a structural layer. Slope the soil away from the house, lay fabric and spread 2 to 3 inches of washed stone that drains quickly.
Related: How Much #57 Stone Under a 12x20 Deck?
Prep
Clear vegetation, rake the soil level and compact it. Lay fabric overlapped at the seams and set edging before spreading the stone.
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. The scale ticket is the real weight; tons per yard here is a planning figure.
Measuring the area
Measure length and width in feet at a few points and use the largest figures, since real sites are rarely square. For odd shapes, split the area into rectangles and circles, work out each one and add them together. Depth is the number most people underestimate: drive a stake, run a level string and measure down to the dug-out surface in several spots.
Common mistakes
People often forget that compaction reduces volume, so they come up short. Others order clean, round stone where a packable crushed stone with fines would have stayed put. Finally, dumping the whole load in one pile far from the work area adds hours of wheelbarrow trips.
Questions people ask
How many tons of #57 stone under a 12x16 deck?
About 2.4 tons at 3 inches deep.
How many yards of #57 stone under a 12x16 deck?
About 1.78 cubic yards.
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 Under a Deck: Weeds, Drainage, and Depth
- 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 Gravel Under a 12x16 Deck?
- How Much Crushed Stone Under a 12x16 Deck?
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