How Much Does 40 Tons of Asphalt Millings Cover?
How much does 40 tons of asphalt millings cover depends on how deep you spread it. At about 1.3 tons per cubic yard, 40 tons is roughly 30.8 cubic yards. Spread 4 inches deep, that covers about 2,492 square feet. Halve the depth and you roughly double the area.
Volume and tonnage calculator →How the coverage is figured
- Tons to cubic yards: 40 ÷ 1.3 = 30.8 yd³.
- Cubic yards to cubic feet: × 27 = 831 cu ft.
- Divide by depth in feet: at 4 inches (0.333 ft), 831 ÷ 0.333 = 2,492 sq ft.
Coverage of 40 tons at different depths
| Depth | Square feet covered | Square yards |
|---|---|---|
| 3 in | 3,323 | 369 |
| 4 in | 2,492 | 277 |
| 6 in | 1,662 | 185 |
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 runs about 1.2 to 1.4 loose tons per cubic yard, so treat the table as a planning range rather than an exact figure.
What 40 tons looks like on site
For delivery, 40 tons means multiple trips or a larger truck. Ask the supplier how they will split it. Spread from the pile with a loader, skid steer or wheelbarrow, then rake to depth before compacting if the material calls for it.
- Check depth as you go. Stakes marked at the target depth help keep the spread even.
- Expect some loss. Compaction and uneven ground use more than the flat-math figure. Keep about 10 percent in reserve.
- Ask about moisture. Wet material weighs more, so a ton of it covers less.
To run your own numbers, use the volume and tonnage calculator.
Where asphalt millings fits
Best suited to:
- Rural driveways and farm lanes
- Parking areas where a dust-free surface is wanted
- Low-cost base under a future paved surface
Poor fit for:
- 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 8x16 area at 3 inches takes about 1.5 tons.
- Weight used here: about 1.3 tons per cubic yard.
Where estimates go wrong
- Measuring only the main rectangle. Aprons, turnouts and curved edges add real square footage.
- Mixing up cubic yards and tons. Yards are volume, tons are weight; convert with the product’s weight per yard.
- 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.
Questions people ask
How many cubic yards is 40 tons of asphalt millings?
About 30.8 cubic yards at 1.3 tons per yard.
How many square feet does 40 tons of asphalt millings cover at 4 inches?
About 2,492 square feet.
How many square feet does 40 tons cover at 3 inches?
About 3,323 square feet.
How much does a yard of asphalt millings weigh?
About 1.2 to 1.4 loose tons.
Will 40 tons fit in one truck?
It depends on the truck. Single-axle dump trucks often carry under 10 tons and tandems around 13 to 16; your supplier will know their limits.
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 30 Tons of Asphalt Millings Cover?
- How Much Does 35 Tons of Asphalt Millings Cover?
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