How Much Crusher Run for a 12x70 Driveway?
A 12 by 70 foot driveway is 840 square feet. How much crusher run for a 12x70 driveway depends on depth: at 4 inches it is about 10.37 cubic yards or 16.1 tons. Suppliers usually sell by the ton, so the tonnage is the number to give them.
Volume and tonnage calculator →The math for a 12x70 driveway
- Area: 12 × 70 = 840 sq ft.
- Depth in feet: 4 ÷ 12 = 0.333 ft.
- Cubic feet: 840 × 0.333 = 280.0 cu ft.
- Cubic yards: ÷ 27 = 10.37 yd³.
- Tons: × 1.55 = 16.1 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 | 7.78 | 12.1 | 13.3 |
| 4 in | 10.37 | 16.1 | 17.7 |
| 6 in | 15.56 | 24.1 | 26.5 |
| 8 in | 20.74 | 32.1 | 35.4 |
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. Ask your supplier for their own tons-per-yard figure, since stone source and moisture shift it.
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. 17.7 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 crusher run fits
Works well for:
- 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 3 inches takes about 4.1 tons.
- Weight used here: about 1.55 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.
- Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.
- Forgetting that compaction shrinks loose material. A loose 4-inch spread of a dense-graded stone may finish closer to 3 inches after rolling.
- Assuming every supplier uses the same weight. Two yards selling the same product name can quote different tons per yard.
Questions people ask
How many tons of crusher run for a 12x70 driveway?
About 16.1 tons at 4 inches deep, or 17.7 tons with 10 percent extra.
How many cubic yards is a 12x70 driveway at 4 inches?
About 10.37 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 12x70?
840 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 12x50 Driveway?
- How Much Crusher Run for a 12x60 Driveway?
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