Asphalt Millings Calculator
Sold by the ton, spread by the yard — this converts both ways.
Millings needed
15.90 tons
Estimated material cost: $239
- Area 800 ft²
- Volume 11.36 yd³
- Metric 14.43 t
Estimate only — confirm the final quantity with your paving contractor or asphalt supplier before ordering.
Asphalt millings are sold by the ton but spread by the yard. Work out cubic yards — length × width × depth in inches ÷ 324 — then multiply by your supplier's tons-per-yard figure, typically 1.2 to 1.6. The calculator above does both steps and adds a compaction allowance.
Show your math
Millings do not have a single fixed density the way hot mix does. Grind size, age and how long the pile has sat all change the weight per yard, which is why suppliers publish their own conversion charts rather than one industry number.
We default to 1.4 tons per cubic yard, inside the 1.2–1.6 range that supplier charts commonly list — Gravelshop, for example, publishes 1.21 t/yd³. Change the field to whatever your supplier quotes and the tonnage updates.
Source: Gravelshop — asphalt millings conversion (1.21 t/yd³, 2,410 lb/yd³)
yd³ = L (ft) × W (ft) × D (in) ÷ 324
yd³ ordered = yd³ × 1.15 (compaction)
tons = yd³ ordered × 1.4 t/yd³ Worked example: 20 × 40 ft at 4 in = 9.88 yd³ → 11.36 yd³ ordered → 15.9 tons.
Millings needed for common areas
Tons at 1.4 t/yd³ including the 15% compaction allowance.
| Area | Square feet | 3 in | 4 in | 6 in |
|---|---|---|---|---|
| Parking pad (10 × 20 ft) | 200 ft² | 3.0 t | 4.0 t | 6.0 t |
| Two-car drive (20 × 20 ft) | 400 ft² | 6.0 t | 8.0 t | 11.9 t |
| Long drive (20 × 40 ft) | 800 ft² | 11.9 t | 15.9 t | 23.9 t |
| Farm lane (12 × 200 ft) | 2,400 ft² | 35.8 t | 47.7 t | 71.6 t |
Millings vs hot mix: what you give up
| Asphalt millings | New hot mix | |
|---|---|---|
| Material price | $10–$20 per ton | $40–$80 per ton |
| Finished surface | Firm, textured, gravel-like | Smooth and sealed |
| Install | Spread and roll — DIY-able with a compactor | Needs a paving crew and hot delivery |
| Availability | Local and seasonal — depends on nearby milling jobs | Available whenever plants are running |
| Best for | Farm lanes, overflow parking, secondary drives, dust control | Main residential driveways and anything you want smooth |
Laying millings so they actually hold
- Grade and compact the base first. Millings will mirror whatever is underneath.
- Spread in lifts of 2–3 inches and roll each lift. A deep single lift stays loose in the middle.
- Roll when it is hot. Summer heat softens the residual binder and the material knits much better.
- Crown the surface slightly so water runs off rather than sitting and washing fines out.
Related
- Asphalt calculator — for new hot mix instead.
- Asphalt tonnage calculator — tonnage tables by driveway size and depth.
- Asphalt driveway cost — full installed-price ranges.
- How much asphalt do I need? — depth and quantity answers in one place.
Frequently asked questions
How many tons of asphalt millings do I need?
Work out the volume in cubic yards — length × width × depth in inches ÷ 324 — then multiply by the supplier's tons-per-yard conversion, usually between 1.2 and 1.6. A 20 × 40 ft area at 4 inches is 9.88 cubic yards, which is about 15.9 tons at 1.4 tons per yard including a 15% compaction allowance.
How much does a cubic yard of asphalt millings weigh?
Between roughly 1.2 and 1.6 tons per cubic yard depending on how finely the material is ground and how much it has settled. Gravelshop publishes 1.21 tons per cubic yard (2,410 lb/yd³) for millings; many suppliers quote closer to 1.4. Ask your supplier for their own conversion — it is the single biggest variable in this calculation.
How much do asphalt millings cost?
Recycled asphalt costs $10 to $20 per ton, or $12 to $32 per cubic yard, according to HomeGuide's 2026 pricing data — roughly a quarter of the price of new hot mix. Availability is local and seasonal: millings come from milling jobs happening nearby, so supply appears and disappears with the paving schedule.
How deep should asphalt millings be laid?
Three to four inches compacted is typical for a residential driveway, and four to six inches for a lane carrying farm or heavy vehicles. Millings are laid in lifts of no more than about 3 inches and rolled between lifts, because a single deep lift will not compact evenly.
Do millings harden like real asphalt?
Partly. Millings still contain the original asphalt binder, so they knit together under rolling and traffic — especially in hot weather — but they never form a fully sealed surface the way new hot mix does. Expect a firm, gravel-like drive that sheds water well and needs occasional topping up rather than a smooth black surface.
Why does this calculator add 15% for compaction?
Because millings are delivered loose and lose volume when rolled. Ordering exactly the loose volume of the finished shape leaves you short once the roller has been over it. The 15% allowance is a working figure, not a measured constant — turn it off in the calculator if your supplier already quotes a compacted conversion.