How Much Asphalt Millings for a 12x20 Parking Pad?
How much asphalt millings for a 12x20 parking pad: at 4 inches deep you need about 2.96 cubic yards, which is roughly 3.9 tons at 1.3 tons per yard. The parking pad covers 240 square feet, so every inch of depth adds about 0.74 yards.
Volume and tonnage calculator →The math for a 12x20 parking pad
- Area: 12 × 20 = 240 sq ft.
- Depth in feet: 4 ÷ 12 = 0.333 ft.
- Cubic feet: 240 × 0.333 = 80.0 cu ft.
- Cubic yards: ÷ 27 = 2.96 yd³.
- Tons: × 1.3 = 3.9 tons.
The volume and tonnage calculator does this for any size.
Asphalt millings needed by depth
| Depth | Cubic yards | Tons (approx.) | Tons +10% |
|---|---|---|---|
| 3 in | 2.22 | 2.9 | 3.2 |
| 4 in | 2.96 | 3.9 | 4.2 |
| 6 in | 4.44 | 5.8 | 6.4 |
About asphalt millings
Asphalt millings are ground-up old pavement. When compacted and warmed by sun they bind into a fairly firm surface, which is why they are popular for rural drives and lots. Weight per yard is a planning number; the scale ticket at the yard is the real one.
Preparing the parking pad
Dig out organic soil, compact the subgrade and set an edge so the stone does not migrate onto the lawn. A pad that holds parked weight for long periods benefits from a dense base under the surface stone. For parked vehicles, 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. 4.2 tons fits in a single 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 parking pad as firm ground allows.
When to choose asphalt millings
Good uses:
- Rural driveways and farm lanes
- Parking areas where a dust-free surface is wanted
- Low-cost base under a future paved surface
Less suited to:
- Areas near wells or streams where local rules limit them
- Decorative or barefoot areas
- Jobs needing a uniform, clean look
Quick reference numbers
- Per inch over 100 sq ft: about 0.40 tons of asphalt millings (0.31 cubic yards).
- Per inch over 1,000 sq ft: about 4.0 tons.
- Another size for comparison: a 10x20 area at 2 inches takes about 1.6 tons.
- Weight used here: about 1.3 tons per cubic yard.
Mistakes that throw off the order
- Ordering exactly the math. Uneven ground and spillage nearly always need a little more than the flat calculation.
- Mixing up cubic yards and tons. Yards are volume, tons are weight; convert with the product’s weight per yard.
- 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.
Questions people ask
How many tons of asphalt millings for a 12x20 parking pad?
About 3.9 tons at 4 inches deep, or 4.2 tons with 10 percent extra.
How many cubic yards is a 12x20 parking pad at 4 inches?
About 2.96 cubic yards.
How much does a cubic yard of asphalt millings weigh?
Usually around 1.2 to 1.4 loose tons, depending on stone size, fines and moisture.
How deep should asphalt millings be for a parking pad?
The table above shows 3 to 6 inches. Shallower depths suit top dressing; deeper depths suit new installs and heavier use.
How many square feet is 12x20?
240 square feet.
Related guides
- How Many Tons of Asphalt Millings for a 40x25 Area?
- 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 Asphalt Millings for a 10x40 Parking Pad?
- How Much Asphalt Millings for a 10x50 Parking Pad?
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