Quick Answer: Compacted asphalt millings weigh approximately 125 lb/ftÂł (1,850 kg/mÂł or 1.69 short tons per cubic yard). One short ton covers 64 sq ft at 3 inches (ideal for residential driveways) or 48 sq ft at 4 inches (farm roads and truck parking). For exact volume and cost takeoffs, use our free Asphalt Millings Calculator.
How much area does one ton of asphalt millings cover?
Coverage decreases as the layer gets thicker. The following values use one explicit assumption: a bulk density of 125 lb/ftÂł, with depth measured in the same material condition. They are calculated examples, not recommendations for driveway design.
| Depth | Sq ft per US short ton | US short tons per 1,000 sq ft |
|---|---|---|
| 2 in | 96.0 | 10.42 |
| 3 in | 64.0 | 15.63 |
| 4 in | 48.0 | 20.83 |
| 6 in | 32.0 | 31.25 |
FHWA’s material description reports variation in processed RAP unit weight and moisture. A single density will not describe every stockpile. Ask your supplier for a measured bulk density and whether it represents loose delivered material or a compacted layer.
Source: FHWA reclaimed asphalt pavement material description. The examples below are calculated from the stated inputs; they are not supplier specifications.
RAP means reclaimed asphalt pavement. The material already contains aged binder. A mass estimate for millings does not determine the fresh binder, emulsion, or rejuvenator needed for a recycled pavement design.
Asphalt millings formula and worked driveway example
Suppose a measured driveway is 60 ft long and 12 ft wide. The planned layer is 4 inches deep, and the density for that material condition is assumed to be 125 lb/ftÂł. Calculate area first, then volume, then mass.
| Step | Calculation | Result |
|---|---|---|
| Area | 60 × 12 | 720 ft² |
| Volume | 720 Ă— (4 Ă· 12) | 240 ftÂł |
| Volume in cubic yards | 240 Ă· 27 | 8.889 ydÂł |
| Mass | 240 Ă— 125 | 30,000 lb |
| US short tons | 30,000 Ă· 2,000 | 15.00 short tons |
If the estimator separately chooses a 5% allowance for measured irregularities and handling, the planning quantity becomes 15 Ă— 1.05 = 15.75 short tons. The allowance is a project decision, not a fixed compaction factor. Confirm it with the installer.
The asphalt millings calculator handles dimensions and unit conversion. Read the displayed output unit: a metric tonne is 1,000 kg; a US short ton is 907.18474 kg. Do not send an unlabeled “tons” result to the supplier.
Loose delivered volume and compacted layer volume
Choose the condition before you choose the density. A stockpile includes gaps between particles. Rolling rearranges those particles, reducing the space the material occupies. Using a loose density with a finished compacted volume can understate the mass needed.
For example, 15 short tons is 30,000 lb. At a hypothetical loose density of 100 lb/ftÂł, that mass occupies 300 ftÂł. At a hypothetical compacted density of 125 lb/ftÂł, it occupies 240 ftÂł. The mass is unchanged; the volume differs. These figures illustrate the calculation and are not a measured shrinkage rate.
Do not add another blanket compaction percentage to a result that already combines compacted density with compacted depth. If a delivery is sold by loose cubic yard, request the supplier’s mass-per-yard conversion. Use the cubic-yard conversion method with that supplied density.
What should you check before ordering millings?
Measure separate areas rather than treating an irregular driveway as a complete rectangle. Record low spots, transitions and any layer that needs rebuilding. A material calculator estimates quantity; it does not assess drainage, subgrade strength or the suitability of the proposed recycled layer.
Ask whether the quote includes delivery, whether pricing uses short tons or metric tonnes, and whether the ticketed weight includes moisture. Obtain the truck’s usable legal payload from the haulier. Divide the planned mass by that payload, then round up to plan loads; truck body volume alone is not a weight limit.
Use a current local quote for cost. For the 15.75-short-ton example, material cost equals 15.75 multiplied by the quoted price per short ton. Keep haulage, grading, base preparation, rolling and taxes separate so the estimate can be checked.
For density conversions, read the asphalt density guide. For a finished layer quantity, the thickness calculator lets you compare material demand at different specified depths.
Questions and answers
How much will a ton of asphalt millings cover at 4 inches?
At an assumed bulk density of 125 lb/ftÂł, one US short ton covers 48 square feet at 4 inches. The answer changes with density. Use density and depth for the same loose or compacted material condition.
How many tons of millings do I need for 1,000 square feet?
At 4 inches and an assumed 125 lb/ftÂł, 1,000 square feet requires 20.83 US short tons before any project-specific allowance. At 3 inches with the same density, it requires 15.63 short tons.
Can I use one fixed compaction factor for all millings?
No. Bulk volume depends on particle grading, moisture and placement. Use measured or supplier-provided densities. Do not add compaction again when your mass calculation already uses compacted depth and compacted density.
Is a ton of millings the same as a cubic yard?
No. A ton measures mass and a cubic yard measures volume. At an assumed 125 lb/ftÂł, a cubic yard weighs 1.6875 US short tons because 27 Ă— 125 Ă· 2,000 = 1.6875.