How Much #57 Stone for a 16x50 Driveway?
How much #57 stone for a 16x50 driveway is a quick volume problem. 800 square feet at 4 inches comes to 9.88 cubic yards. #57 stone usually weighs about 1.3 to 1.45 tons per cubic yard, so plan on roughly 13.3 tons.
Volume and tonnage calculator →The math for a 16x50 driveway
- Area: 16 × 50 = 800 sq ft.
- Depth in feet: 4 ÷ 12 = 0.333 ft.
- Cubic feet: 800 × 0.333 = 266.7 cu ft.
- Cubic yards: ÷ 27 = 9.88 yd³.
- Tons: × 1.35 = 13.3 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 | 4.94 | 6.7 | 7.3 |
| 3 in | 7.41 | 10.0 | 11.0 |
| 4 in | 9.88 | 13.3 | 14.7 |
| 6 in | 14.81 | 20.0 | 22.0 |
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 driveway
Strip sod and soft topsoil, grade for drainage and compact the subgrade before any stone goes down. Gravel drives last longer with a compacted base layer under the top stone and a slight crown so water runs off. Since the driveway carries car and truck traffic, a little extra depth is cheap insurance.
Ordering tips
- Round up. Compaction and uneven ground eat material. Adding about 10 percent is common.
- Delivery size. 14.7 tons may take more than one 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 driveway as firm ground allows.
Where #57 stone fits
Good uses:
- 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 12x24 area at 3 inches takes about 3.6 tons.
- Weight used here: about 1.35 tons per cubic yard.
Where estimates go wrong
- Ordering exactly the math. Uneven ground and spillage nearly always need a little more than the flat calculation.
- Ignoring the base. A thin surface layer over soft soil fails early no matter how much material is on top.
- 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 16x50 driveway?
About 13.3 tons at 4 inches deep, or 14.7 tons with 10 percent extra.
How many cubic yards is a 16x50 driveway at 4 inches?
About 9.88 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 driveway?
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 16x50?
800 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 16x40 Driveway?
- How Much #57 Stone for a 16x45 Driveway?
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