How Much Crusher Run for a 20x70 Driveway?
How much crusher run for a 20x70 driveway: at 4 inches deep you need about 17.28 cubic yards, which is roughly 26.8 tons at 1.55 tons per yard. The driveway covers 1,400 square feet, so every inch of depth adds about 4.32 yards.
Volume and tonnage calculator →The math for a 20x70 driveway
- Area: 20 × 70 = 1,400 sq ft.
- Depth in feet: 4 ÷ 12 = 0.333 ft.
- Cubic feet: 1,400 × 0.333 = 466.7 cu ft.
- Cubic yards: ÷ 27 = 17.28 yd³.
- Tons: × 1.55 = 26.8 tons.
The volume and tonnage calculator does this for any size.
Crusher run needed by depth
| Depth | Cubic yards | Tons (approx.) | Tons +10% |
|---|---|---|---|
| 3 in | 12.96 | 20.1 | 22.1 |
| 4 in | 17.28 | 26.8 | 29.5 |
| 6 in | 25.93 | 40.2 | 44.2 |
| 8 in | 34.57 | 53.6 | 58.9 |
About crusher run
Crusher run (also sold as crush and run, dense-grade aggregate or QP in some regions) mixes stone with stone dust. It compacts into a firm, nearly solid layer, which makes it the usual base under pavers, asphalt and gravel drives. Weight per yard is a planning number; the scale ticket at the yard is the real one.
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. For car and truck traffic, the depths in the table above are a reasonable starting range.
Ordering tips
- Round up. Compaction and uneven ground eat material. Adding about 10 percent is common.
- Delivery size. 29.5 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.
Good and poor uses for crusher run
Good uses:
- Base under asphalt, pavers or concrete
- Gravel drives that need a firm, packed surface
- Shed pads and equipment pads
Poor fit for:
- Drainage layers, since the fines slow water
- Decorative beds
- Spots where you want water to soak straight through
Quick reference numbers
- Per inch over 100 sq ft: about 0.48 tons of crusher run (0.31 cubic yards).
- Per inch over 1,000 sq ft: about 4.8 tons.
- Another size for comparison: a 12x24 area at 4 inches takes about 5.5 tons.
- Weight used here: about 1.55 tons per cubic yard.
Common estimating mistakes
- 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.
- Forgetting that compaction shrinks loose material. A loose 4-inch spread of a dense-graded stone may finish closer to 3 inches after rolling.
- Measuring only the main rectangle. Aprons, turnouts and curved edges add real square footage.
Questions people ask
How many tons of crusher run for a 20x70 driveway?
About 26.8 tons at 4 inches deep, or 29.5 tons with 10 percent extra.
How many cubic yards is a 20x70 driveway at 4 inches?
About 17.28 cubic yards.
How much does a cubic yard of crusher run weigh?
Usually around 1.5 to 1.7 compacted tons, depending on stone size, fines and moisture.
How deep should crusher run be for a driveway?
The table above shows 3 to 8 inches. Shallower depths suit top dressing; deeper depths suit new installs and heavier use.
How many square feet is 20x70?
1,400 square feet.
Related guides
- Crushed Stone vs Gravel: Differences and Best Uses
- 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 Crusher Run for a 20x50 Driveway?
- How Much Crusher Run for a 20x60 Driveway?
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