#57 Crushed Stone Calculator (Driveways & Base Layers)
Estimate exact tonnage, cubic yards, and haul weight for ASTM C33 #57 crushed aggregate (3/4" to 1" angular stone) used in driveways, retaining wall drainage, and patio bases.
Interactive Material & Cost Estimator
HomeYardMath.com — Hardware Store Shopping List
Quick Reference Coverage Chart (Gravel & Stone)
Instant pre-calculated material estimates for common US residential project sizes before compaction buffer:
| Typical US Project | Area | Depth | Volume | Weight | Store Bags |
|---|---|---|---|---|---|
| Shed or Hot Tub Foundation Pad (10 ft × 12 ft) | 120 sq ft | 4 inches | 1.48 cu yd | 1.85 tons (3,700 lbs) | 80 bags (0.5 cu ft) |
| Single-Car Driveway Top Dress (12 ft × 30 ft) | 360 sq ft | 3 inches | 3.33 cu yd | 4.17 tons (8,330 lbs) | 180 bags (Buy Bulk!) |
| Single-Car Driveway Structural Base (12 ft × 40 ft) | 480 sq ft | 4 inches | 5.93 cu yd | 7.41 tons (14,815 lbs) | Bulk Dump Truck |
| Standard 2-Car Gravel Driveway (20 ft × 50 ft) | 1,000 sq ft | 4 inches | 12.35 cu yd | 15.43 tons (30,860 lbs) | Bulk Tri-Axle Delivery |
| Concrete Slab Sub-Base (24 ft × 24 ft Garage) | 576 sq ft | 6 inches | 10.67 cu yd | 13.33 tons (26,670 lbs) | Bulk Delivery Only |
Engineering Formula & Material Density Constant
ASTM C33 #57 crushed stone consists of angular crushed limestone, granite, or trap rock screened between 1/2 inch and 1 inch (averaging 3/4 inch) with minimal dust fines. Loosely dumped #57 stone weighs approximately 92.5 lbs per cubic foot, or 2,500 lbs (1.25 US short tons) per cubic yard. When mechanically compacted with a vibratory plate compactor or roller, volume shrinks by 12% to 15%.
🚨 The #1 Mistake Homeowners Make with Driveway Stone
Ever notice how some gravel driveways stay rock-solid for years, while others turn into mud pits where cars get stuck after the first rain? The secret is not the stone itself — it is the shape of the stone.
Spread round, natural pea gravel on a driveway and it rolls under your tires like marbles. #57 Crushed Stone is different: it is blasted apart at the quarry, so every piece has sharp, jagged edges that lock into each other like a jigsaw puzzle — strong enough to carry heavy truck traffic without shifting.
🚧 The Pro 3-Layer Driveway Secret
Professional US contractors never build a driveway in a single layer. They always follow this 3-step formula:
- Layer 1 (Sub-Base): 4 to 6 inches of fist-sized #3 coarse rock. This locks the soil underneath in place.
- Layer 2 (Driving Course): 3 to 4 inches of #57 Crushed Stone. This is the layer that carries the load and drains the water.
- Layer 3 (Surface Seal): An optional 2 inches of Crusher Run if you want a tight, almost-paved finish on top.
💰 Bagged vs. Bulk: When Do You Stop Buying Bags?
Grabbing 50 lb bags at Home Depot feels easy — until you run the math:
One 50 lb bag costs about $5.25, which works out to roughly $283 per cubic yard. Order the same yard in bulk from a local quarry and it drops to just $40 to $48 per cubic yard (plus a delivery fee). So if your project needs more than 32 bags (0.6 cu yd), buying bags is literally throwing money away!
Frequently Asked Questions
How much does 1 cubic yard of #57 crushed stone weigh?
One cubic yard of dry #57 crushed stone weighs approximately 2,500 pounds (1.25 US short tons). Conversely, 1 US ton (2,000 lbs) of #57 stone equals roughly 0.80 cubic yards (21.6 cubic feet).
How many square feet will 1 ton of #57 stone cover?
One ton (2,000 lbs) of #57 crushed stone covers approximately 130 sq ft at 2 inches deep, 86 sq ft at 3 inches deep, or 65 sq ft at 4 inches deep before compaction.
What is the actual size of #57 stone?
#57 stone ranges from 1/2 inch to 1 inch in diameter, with the majority of stones measuring roughly 3/4 inch—roughly the size of a golf ball.
Can I use #57 stone under a concrete slab or paver patio?
Yes. A 4-to-6-inch compacted bed of clean #57 stone is the standard capillary break and structural sub-base required under residential concrete garage slabs and shed foundations.