Quick Answer: To calculate crushed stone, multiply Length (ft) x Width (ft) x Depth (in) / 12 / 27 to get cubic yards. Densities vary by type: #57 stone 2,500 lbs/cu yd, #411 stone 2,600, #2 stone 2,500, crusher run 2,700, stone dust 2,700. One cubic yard covers 81 sq ft at 4 inches deep. Add 10% for compaction and waste. For a 20 x 10 ft driveway pad at 4 inches deep, you need about 2.72 cubic yards (7,340 lbs or 147 bags of 50 lb stone) at roughly $109.
Calculate how much crushed stone you need for driveways, parking pads, base layers, French drains, and landscaping projects. Enter your dimensions, select your stone type, and instantly get the volume in cubic yards, total weight, number of bags, and estimated cost.
How to Calculate Crushed Stone
The formula for calculating crushed stone volume is the same as any bulk material:
- Measure the length and width of your project area in feet. For irregularly shaped areas, break them into rectangles and calculate each section separately.
- Choose your crushed stone depth based on the application: 2-3 inches for walkways, 4 inches for driveways, or 4-6 inches for structural base layers under concrete or pavers.
- Multiply length × width to get the area in square feet.
- Multiply the area by the depth (converted to feet by dividing inches by 12) to get the volume in cubic feet.
- Divide by 27 to convert cubic feet to cubic yards, the standard unit for bulk stone purchasing.
- Add 10% for waste, compaction, and uneven subgrades. Crushed stone compacts about 10-15% from its loose volume.
Crushed Stone Coverage Chart
Quick reference for how much area one cubic yard of crushed stone covers at common depths, with weight by stone type:
| Depth | Coverage per Cu Yd | #57 / #2 Stone | #411 Stone | Crusher Run / Dust |
|---|---|---|---|---|
| 2 inches | 162 sq ft | 2,500 lbs | 2,600 lbs | 2,700 lbs |
| 3 inches | 108 sq ft | 2,500 lbs | 2,600 lbs | 2,700 lbs |
| 4 inches | 81 sq ft | 2,500 lbs | 2,600 lbs | 2,700 lbs |
| 6 inches | 54 sq ft | 2,500 lbs | 2,600 lbs | 2,700 lbs |
| 8 inches | 40.5 sq ft | 2,500 lbs | 2,600 lbs | 2,700 lbs |
Weight shown is per cubic yard regardless of depth. Coverage assumes level ground with no compaction loss.
Crushed Stone Type Guide
Crushed stone is classified by size number. Each type has specific characteristics that make it suited to particular applications:
- #57 Stone (3/4" to 1"): The most popular crushed stone for residential projects. Clean, angular pieces with no fines, so water drains through freely. Ideal for French drains, retaining wall backfill, pipe bedding, dry creek beds, and decorative landscaping. Not suitable for driving surfaces because the uniform size means it does not lock together.
- #411 Stone (blend of #4 and fines): A graded mix of 1.5-inch stone down to fine particles. The range of sizes allows the material to pack tightly when compacted, forming a firm, stable surface. Excellent for driveways, parking areas, and gravel roads. Sometimes called "modified stone" or "process stone" depending on the region.
- #2 Stone (2.5" to 4"): Large, chunky pieces used where heavy drainage is required. Common in commercial drainage systems, culvert backfill, and as the bottom layer in deep French drains. Too large for walking surfaces but unmatched for moving water quickly away from structures.
- Crusher Run (DGA / Dense-Grade Aggregate): A blend of 3/4-inch stone all the way down to stone dust. The most versatile base material in construction. When compacted in 2-inch lifts with a plate compactor or roller, it forms a dense, load-bearing layer suitable for driveways, shed pads, patio bases, and sub-base under concrete slabs. It is the contractor's first choice for any structural base.
- Stone Dust / Screenings (1/4" and finer): Fine crusite particles left over from the crushing process. Used as a leveling layer on top of compacted crusher run before laying pavers or flagstone. Also mixed with cement to create a dry-pack mortar. Compacts extremely well but does not drain, so it should not be used alone where water management matters.
Crushed Stone Applications
Crushed stone is one of the most versatile construction materials. Here are the most common residential and commercial uses:
- Driveways: Use 4 inches of compacted #411 stone or crusher run over geotextile fabric. For heavy vehicles, go with 6 inches. Top with a thin layer of #57 stone for a finished look, or leave the crusher run as the driving surface.
- Parking Pads: Similar to driveways, 4-6 inches of crusher run works for passenger vehicles. Grade the surface slightly away from structures for drainage. A 10 x 20 ft parking pad needs about 2.5-3.7 cubic yards.
- French Drains: Fill the trench with 6-12 inches of #57 stone surrounding a perforated drain pipe. The open structure of #57 stone allows groundwater to flow freely into the pipe and away from foundations.
- Foundation Base: Before pouring concrete, lay 4-6 inches of crusher run and compact it in 2-inch lifts. This provides a stable, well-drained base that prevents settling and cracking in the slab above.
- Walkways and Garden Paths: Lay landscape fabric, then spread 2-3 inches of #57 stone between edging materials. For a tighter surface, use #411 stone or crusher run instead. Stone dust can be used as a top-dressing for a smoother walking surface.
Tips for Ordering Crushed Stone
- Always order 10% extra. Crushed stone compacts significantly, and subgrades are rarely perfectly level. That extra 10% prevents a costly second delivery.
- Buy in bulk, not bags. Bulk delivery by the cubic yard costs $35-55 per yard. Bagged stone from a home improvement store costs $250-375 per equivalent cubic yard. For anything over 1 cubic yard, bulk is the clear winner.
- Check delivery minimums. Most quarries and landscape supply yards have a 1-3 cubic yard delivery minimum. Some charge a flat delivery fee of $50-150 regardless of load size, so ordering more at once is more economical.
- Prepare the site first. Have your area excavated, edging installed, and landscape fabric down before the stone arrives. Dumped stone is much harder to move than you expect.
- Compact in lifts. For base layers, spread crusher run 2 inches at a time and compact each lift with a plate compactor before adding the next. This creates a much stronger base than dumping the full depth at once.
- Know your truck access. A standard dump truck carries 10-15 cubic yards and needs a clear path at least 10 feet wide. If access is tight, ask about smaller tri-axle or single-axle deliveries.
Formula Summary
Crushed Stone Volume Formula: To calculate the cubic yardage of crushed stone needed, multiply the Length (ft) x Width (ft) x Depth (in), divide by 12 to convert depth to feet, then divide by 27 to convert cubic feet to cubic yards.
V(cu yd) = (L(ft) x W(ft) x D(in)) / (12 x 27)
Circular Area: A = pi x (d / 2)^2 where d is the diameter in feet.
Weight Formula: W(lbs) = V(cu yd) x (1 + W%) x rho, where rho is the stone density in lbs/cu yd.
Bag Count: Bags(50 lb) = ceil(W(lbs) / 50)
| Stone Type | Density (lbs/cu yd) | Typical Cost ($/cu yd) |
|---|---|---|
| #57 Stone | 2,500 | $35-45 |
| #411 Stone | 2,600 | $35-50 |
| #2 Stone | 2,500 | $30-45 |
| Crusher Run | 2,700 | $30-45 |
| Stone Dust | 2,700 | $40-55 |
Standard Assumptions: Waste factor of 10% accounts for compaction, spillage, and uneven subgrades. 1 cubic yard = 27 cubic feet. Standard bag size is 50 lbs. 1 ton = 2,000 lbs. Prices vary by region and quarry — get local quotes for accurate budgeting.
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- Cubic Yard Calculator — convert any dimensions to cubic yards
Estimates are for planning purposes only. Consult a qualified contractor for critical projects. Actual material requirements may vary based on site conditions, waste, and installation methods.
Pricing last verified: February 2026. Material prices vary by region, season, and supplier. Prices shown are national averages for planning purposes.