This asphalt millings calculator tells you how many tons and loose cubic yards of recycled asphalt to order for a driveway, farm lane or parking area. Millings arrive fluffy and lose a good part of their volume under a roller, so the tool works from the compacted depth you want, adds a compaction allowance and waste, then converts to tons, truckloads and cost. Many supplier coverage charts skip the compaction step, which is the most common reason people run short.
Quick answer: tons of millings ≈ square feet × compacted depth (in) ÷ 324 × 1.56. That is 1.25 tons per loose yard plus 25% for compaction.
A 12 × 60 ft driveway (720 sq ft) at 4 inches needs about 13.9 tons, or 14.6 tons with 5% waste. One ton covers about 52 sq ft at 4 inches, 69 sq ft at 3 inches and 104 sq ft at 2 inches.
On this page
What Are Asphalt Millings?
Millings are the crushed asphalt that a milling machine grinds off a road before it is repaved. They are also called reclaimed asphalt pavement (RAP), recycled asphalt or asphalt grindings. A New York City fact sheet describes them as 93% to 97% stone and 3% to 7% asphalt binder by weight, with particles mostly 0.3 to 1.5 inches across plus some fines. Most RAP goes back into new hot mix at the plant, and the surplus is sold for driveways, lanes, parking pads and as a base layer.
The leftover binder is what makes millings different from gravel. Compacted in warm weather, the particles stick together and the surface firms up over time instead of staying loose. They do not become hot mix asphalt, though: the binder is aged and there is not enough of it to make a sealed, smooth pavement.
How to Calculate Millings
- Area in square feet. 12 × 60 ft = 720 sq ft.
- Compacted volume. 720 × 4 in ÷ 12 ÷ 27 = 8.89 cubic yards.
- Add compaction. 8.89 × 1.25 = 11.11 loose cubic yards.
- Add waste. 11.11 × 1.05 = 11.67 cubic yards to order.
- Convert to tons. 11.67 × 1.25 = 14.58 tons.
- Trucks. 14.58 ÷ 20 = one tri-axle load; at 14 tons per tandem it is one load plus about half a ton, so ask for a slightly heavier tandem or take two.
Loose vs Compacted Weight of Millings
The figure you need depends on whether the volume is loose in the truck or rolled in place. Sellers quote loose material; engineers quote compacted density. The FHWA's guideline on reclaimed asphalt pavement reports a unit weight of 120 to 140 lb/ft³ for milled RAP and maximum dry densities of 100 to 125 lb/ft³ in compaction tests. A delivery marketplace lists millings at about 2,500 lb per loose cubic yard.
| State | lb/ft³ | lb/yd³ | Tons/yd³ | Source |
|---|---|---|---|---|
| Loose, as delivered | about 93 | about 2,500 | 1.25 | Supplier listing |
| Compacted, test maximum dry density | 100 to 125 | 2,700 to 3,375 | 1.35 to 1.69 | FHWA |
| Milled RAP unit weight | 120 to 140 | 3,240 to 3,780 | 1.62 to 1.89 | FHWA, NYC |
| Calculator default, compacted | 115.7 | 3,125 | 1.56 | 1.25 × 1.25 |
Moisture in stockpiles is typically 5% to 8% by weight (NYC fact sheet), so wet millings weigh more per yard.
With the defaults, millings compact to about 1.56 tons per cubic yard, inside the FHWA range. If your supplier sells by the compacted yard or gives you a coverage figure that already includes rolling, set the compaction allowance to 0. Quoted coverage figures vary widely; one supplier lists 75 sq ft per ton at 4 inches, which only works if the millings barely compact. This calculator's 52 sq ft per ton is the cautious number.
How Deep Should Millings Be?
- Driveways and parking pads: 3 to 4 inches compacted over a firm, well-drained base. On soft ground, put 4 to 6 inches of crushed stone underneath first; the gravel base calculator works out that layer.
- Farm lanes and heavy equipment: 4 to 6 inches, placed in two lifts.
- Topping an existing gravel driveway: 2 to 3 inches, after regrading potholes and the crown.
- As a base under new asphalt: 4 to 6 inches compacted, like any aggregate base. Some agencies limit how much RAP goes into base; Montana's guidance cites a state DOT limit of 50% millings blended with other aggregate in foundation layers.
How to Compact and Bind Millings
- Prepare the subgrade. Strip sod and topsoil, grade for drainage (about a 2% crown or cross slope), and compact the soil.
- Spread in lifts of about 3 inches. Thin lifts compact far better than one thick layer. Rake out large chunks and anything that is not asphalt.
- Roll it warm and slightly damp. Use a vibratory roller for driveways, a plate compactor for small areas. Work on a hot day if you can, because the old binder softens in the heat and the particles knit together. A light mist of water helps the fines settle.
- Seal it if you want a harder surface. Montana DEQ notes that millings used as a driving surface give "the best results" when placed soon after milling, compacted, and treated with a rejuvenating agent and/or a chip seal. A tar-and-chip or emulsion treatment also cuts dust and loose stones.
- Expect some settling. Fill low spots after the first few weeks of traffic and roll again.
Millings vs Gravel vs Hot Mix Asphalt
| Asphalt millings | Crushed stone / crusher run | Hot mix asphalt | |
|---|---|---|---|
| Material price | About $10 to $27 per ton | About $18 to $34 per ton | Several times more per ton |
| Typical depth | 3 to 4 in on a base | 6 to 12 in | 2 to 3 in on 6 to 8 in of base |
| Surface | Firm, dark, slightly rough | Loose stones on top | Smooth, sealed |
| Dust and loose stone | Low once bound | Moderate to high | Very low |
| Snow plowing | Fair; blade can gouge | Poor; throws stone | Good |
| Upkeep | Regrade and roll low spots | Regrade and top up | Crack fill, sealcoat |
| DIY friendly | Yes, with a roller | Yes | No, needs a paving crew |
Material prices are HomeGuide survey ranges before delivery. Price a paved driveway with the driveway cost calculator.
Pros: cheap per ton, firmer and less dusty than gravel, recycled material, and easy to repair. Cons: quality varies by source and can include dirt or debris, the surface is never as smooth or sealed as hot mix, fresh millings can track black material in summer heat, and stockpiles left too long can set up into clumps.
Asphalt Millings Cost
HomeGuide's price survey puts recycled asphalt millings at about $10 to $27 per ton or $25 to $50 per cubic yard in bulk, and $72 or more per ton when small quantities are delivered. Delivery is often charged per load, so a full truck usually gives the lowest price per ton. Choose "per ton" or "per cubic yard" in the calculator to match your quote; per-yard prices are applied to the loose yards ordered.
Check Local Rules First
Millings are a recycled material and states regulate them differently. Montana, for example, classes waste asphalt as a solid waste that cannot be used as clean fill, but allows millings as a compacted driving surface or road base, as long as they stay above seasonal groundwater and are not placed in drainages or within 100 feet of standing water or wells. New York City's millings program says they are not to be placed below the water table. Some towns and HOAs also have their own driveway surface rules. Check with your state environmental agency and local building department before ordering, especially near streams, wetlands or a well.
Worked Examples
Example 1: Single-car driveway
12 × 60 ft at 4 inches with the defaults: 8.89 yd³ compacted, 11.11 yd³ loose, 11.67 yd³ with 5% waste, 14.6 tons. At $20 per ton that is about $292 in material, plus delivery.
Example 2: Farm lane priced by the yard
10 × 400 ft (4,000 sq ft) at 3 inches: 37.04 yd³ compacted, 46.30 yd³ loose, 48.61 yd³ with waste, 60.8 tons. That is five tandem loads or four tri-axle loads. At $35 per cubic yard the millings cost about $1,701.
Example 3: Equipment pad in two lifts
30 × 30 ft (900 sq ft) at 6 inches total, placed as two 3-inch lifts: 16.67 yd³ compacted, 20.83 yd³ loose, 21.88 yd³ with waste, 27.3 tons, or two tandem or two tri-axle loads. At $18 per ton, about $492.
Related Calculators
Frequently Asked Questions
How many tons of asphalt millings do I need for my driveway?
Multiply square feet by the compacted depth in inches, divide by 324, and multiply by about 1.56 tons per compacted yard, then add 5% for waste. A 12 × 60 ft driveway at 4 inches needs about 14.6 tons.
How much does a yard of asphalt millings weigh?
About 1.25 tons (2,500 lb) per loose cubic yard as delivered. Rolled in place it weighs about 1.35 to 1.7 tons per yard; the FHWA reports maximum dry densities of 100 to 125 lb/ft³.
How many square feet does a ton of millings cover?
With compaction included, about 104 sq ft at 2 inches, 69 sq ft at 3 inches and 52 sq ft at 4 inches. Loose coverage figures from suppliers are higher because they ignore rolling.
How thick should asphalt millings be for a driveway?
Three to four inches compacted is typical for cars, placed over a firm, well-drained base. Use 4 to 6 inches in two lifts for trucks or equipment.
Do asphalt millings harden?
They bind and firm up when compacted, especially in hot weather, because the old asphalt binder softens and sticks the particles together. They do not become as hard or smooth as new hot mix. A rejuvenator, emulsion or chip seal makes the surface tougher.
Are asphalt millings cheaper than gravel?
Often, yes. HomeGuide's survey puts millings at about $10 to $27 per ton against $18 to $31 for road base, and millings are lighter, so each ton covers more ground. Local supply matters: where there is little road milling nearby, gravel can be cheaper.
Are asphalt millings bad for the environment?
They are a recycled material, but they contain asphalt binder, so states limit where they can go. Typical rules keep them above the water table and away from wells, streams and drainages. Check your state's guidance before using them near water.
Sources
- FHWA, Reclaimed Asphalt Pavement: Material Description (FHWA-RD-97-148; unit weight 120 to 140 lb/ft³, maximum dry density 100 to 125 lb/ft³).
- NYC Office of Environmental Remediation, Asphalt Millings: Physical and Mechanical Properties (composition, particle size, moisture, water table).
- Montana DEQ, Guidance on Waste Asphalt Recycling, Reuse or Disposal (2015; beneficial use, setbacks, rejuvenator or chip seal).
- Hello Gravel, Asphalt millings product specifications (about 2,500 lb per cubic yard; 75 sq ft per ton at 4 in).
- HomeGuide, Gravel prices (millings, road base and crush and run prices).
- FHWA, Questions and Answers About Vehicle Size and Weight and Hello Gravel, Dump truck weight capacity guide (truck payloads).
Last updated: October 2026 · How we calculate