How to Calculate Crushed Stone Quantity
Crushed stone calculation is straightforward but has a few wrinkles compared to other materials: it compacts significantly during installation (you need to order extra), the size grades have specific structural roles, and most projects use multiple grades layered together. Our calculator handles the math — here's the formula behind it.
Weight (tons) = Cubic yards × 1.42 (standard #57 density)
Compacted volume = Loose volume × 0.80 (accounts for compaction)
The density of 1.42 t/yd³ is for standard #57 crushed stone (the most common landscape grade). Dense-grade aggregate (#411) is slightly denser at 1.45 t/yd³ because the smaller fines fill more void space. Larger #4 stone runs about 1.40 t/yd³. Always pad your order by 10-15% to account for compaction during installation.
Worked example: residential driveway
A 20 ft × 10 ft residential driveway with proper 6-inch total depth (4-inch base + 2-inch top):
- Volume: (20 × 10 × 6) ÷ 324 = 3.70 cubic yards
- Weight (mostly #411 base + #57 top): 3.70 × 1.43 avg = 5.29 tons
- With 10% waste/compaction: Order 5.8 tons
- Cost at $40/ton bulk: 5.8 × $40 = $232
- Delivery: Add $75-150 for typical 25-mile radius
Understanding Crushed Stone Size Grades
ASTM size numbers reference specific gradations (size ranges) of crushed stone. Picking the right grade for your application is more important than how much you order. Here's the practical breakdown.
#57 (1/2 to 1 inch) — most common
The workhorse grade. Used for: driveway top course, paver base, drainage applications (French drains, foundation drainage), and general landscape. Drains well, looks clean, easy to compact. Density: 1.42 t/yd³. Cost: $30-50/ton bulk. Often called "3/4 inch clean" or "3/4 inch washed."
#411 (dense-grade with fines) — driveway top
Mix of stone fragments from dust to 1 inch. The fines pack into void spaces, creating a dense, hard surface when compacted. Used for: driveway surface course, parking pad surfaces, compacted walkways. Density: 1.45 t/yd³. Cost: $30-45/ton bulk. Drains poorly compared to clean stone — don't use where drainage matters.
#4 (1.5 to 2.5 inch) — heavy base
Larger stone for base courses under heavy loads. Used for: driveway base under #411 top, commercial parking lot base, riprap erosion control, oversized drainage projects. Density: 1.40 t/yd³. Cost: $25-40/ton. Doesn't compact as tightly as smaller grades but carries heavier loads.
#8 (3/8 inch) — paver bedding (with sand)
Small crushed stone used for paver bedding in commercial installations and sometimes residential. Often called "screenings" or "stone chips." Don't confuse with concrete sand or play sand — wrong materials for paver bedding. Density: 1.45 t/yd³.
DGA (Dense Graded Aggregate) — premium driveway base
Engineered mix of crushed stone and fines specifically designed for maximum compaction. Common in cold climates where freeze-thaw cycles are brutal. More expensive than standard #411 but lasts significantly longer. Cost: $35-55/ton.
Riprap (4-12 inch+) — erosion control
Large angular stones for stream bank protection, retaining wall fill, and major drainage. Sold by ton or by truckload. Not used for typical residential projects.
Crushed Stone by Project Type
Different projects use different grades and depths. Here are the most common applications with exact specifications.
Residential driveway (gravel/crushed stone)
Total depth 6 inches. Layer structure: 4 inches of #411 dense-grade base, compacted in 2-inch lifts, topped with 2 inches of #57 for a clean finish. For a typical 20x10 ft driveway: 2.5 yd³ of #411 + 1.2 yd³ of #57 = 3.7 yd³ total (≈ 5.3 tons).
French drain
4 inches wide × 12 inches deep × 20 ft long trench around perforated pipe. Use #57 clean crushed stone exclusively — fines block drainage. Wrap pipe and stone in landscape fabric (top and sides only, not bottom). Quantity: 0.5 yd³ (0.7 tons) per 20 linear feet.
Foundation drainage
2 ft wide × 2 ft deep perimeter trench filled with #57 crushed stone. For typical 1,500 sq ft house with 160 linear feet of foundation: 24 yd³ (34 tons). Major project — often combined with new foundation construction.
Paver patio base
4 inches of compacted #57 base under 1 inch of paver sand bedding. For a 200 sq ft patio: 2.5 yd³ of crushed stone (3.6 tons) + 0.6 yd³ paver sand. Compact base in 2-inch lifts with plate compactor.
Shed / outbuilding pad
4 inches of compacted #411 or dense-grade. For a 12x16 ft shed pad: 2.4 yd³ (3.4 tons). Compact thoroughly — shed settling causes door alignment problems within 2-3 years if base is undersized.
Walkway / garden path
3 inches of #57 over fabric, with steel edging. For 3 ft × 30 ft walkway: 0.83 yd³ (1.2 tons). For wheelchair-accessible paths, use dense-grade for a firmer surface.
Coverage Reference Table
How many square feet 1 ton or 1 cubic yard of crushed stone covers at common depths:
| Depth | Per cubic yard | Per ton (#57) | Per ton (#411) |
|---|---|---|---|
| 1 inch | 324 sq ft | 228 sq ft | 224 sq ft |
| 2 inches | 162 sq ft | 114 sq ft | 112 sq ft |
| 3 inches | 108 sq ft | 76 sq ft | 75 sq ft |
| 4 inches | 81 sq ft | 57 sq ft | 56 sq ft |
| 6 inches | 54 sq ft | 38 sq ft | 37 sq ft |
| 8 inches | 40 sq ft | 28 sq ft | 28 sq ft |
| 12 inches | 27 sq ft | 19 sq ft | 19 sq ft |
Crushed Stone Pricing in 2026
| Grade | Per ton (bulk) | Per cubic yard | Per 50 lb bag |
|---|---|---|---|
| #57 (3/4") | $30–50 | $40–70 | $4–7 |
| #411 (dense-grade) | $30–45 | $40–65 | $4–6 |
| #4 (larger base) | $25–40 | $35–55 | $4–6 |
| #8 (paver chips) | $35–55 | $50–80 | $5–8 |
| DGA (premium) | $35–55 | $50–80 | — |
| Riprap (4–12") | $45–75 | — | — |
Delivery typically adds $50-150 for local 1-ton minimums. Multi-ton deliveries (5+ tons) often include delivery in the per-ton price. Bulk pricing is dramatically cheaper than bagged — by 4-6× per ton. For any project over 0.5 yd³, always order bulk delivery.
How to Install Crushed Stone Properly
The difference between a crushed stone surface that lasts 20 years and one that fails in 3 is the installation. Here's the professional process:
- Excavate to proper depth. 6-8 inches for driveways, 4 inches for patio bases, 12-24 inches for foundation drainage. Remove all organic material (sod, topsoil).
- Compact existing subgrade. Use a plate compactor to firm up the excavation bottom. Soft spots will telegraph through and cause future depressions.
- Install landscape fabric. Non-woven geotextile prevents crushed stone from migrating into soil. Overlap seams 6 inches. Skip for French drains (use only top and sides, not bottom).
- Add base layer in lifts. Spread 2 inches of crushed stone, compact with plate compactor, repeat until target depth. Compacting in thick layers leaves voids and creates future settlement.
- Test compaction. Properly compacted crushed stone should feel solid underfoot — no give, no shifting. If it feels loose, compact more.
- Add top course (driveways). 2 inches of #57 over the #411 base, compacted lightly. Don't over-compact the top — leaves rough surface.
- Install edge restraint. Steel, stone, or concrete edging keeps crushed stone contained and prevents migration into adjacent lawn or street.
- Final water cure. Light water spray helps lock particles together for compacted surfaces. Don't oversaturate — just dampen.
Common Crushed Stone Mistakes
- Wrong grade for application: #411 in drainage applications doesn't drain. #57 as driveway top is too loose. Match grade to use.
- Skipping fabric: Crushed stone sinks into soil over 3-5 years without fabric. Order an extra ton just to compensate annually, or do it right the first time.
- Compaction in thick lifts: Compacting 6 inches at once leaves voids underneath. Always 2-inch lifts maximum.
- No edge restraint: Crushed stone migrates outward from any unconfined edge. Edging adds 10% to project cost but doubles longevity.
- Underestimating compaction: Order 10-15% more than calculated. The "extra" disappears into the compacted result.
- Mixing grades: #57 with #411 in the same layer creates uneven settling. Use one grade per layer.