How to Use This Calculator
Enter your driveway or access road dimensions in feet, then set the depth in inches to your target compacted depth. From the material dropdown, select "Asphalt Millings (RAP)" to use the correct density of 110 lbs per cubic foot — lighter than hot mix asphalt, which is 145 lbs per cubic foot. The result shows total tons with a 10% waste factor already included. Enter your supplier's price per ton to get a cost estimate. For irregular shapes, calculate each section separately and add the tonnage. Call a local paving company with your ton figure to get a delivery quote and check their minimum order.
How to Calculate Asphalt Millings Tonnage
Formula: Tons = (Length × Width × Depth in inches ÷ 12) × 110 ÷ 2,000.
Asphalt millings weigh approximately 110 lbs per compacted cubic foot. Fresh hot mix asphalt weighs 145 lbs per cubic foot. Always use the millings density (110) when calculating millings — using the HMA density overstates your order by about 30%.
Example: a 20-foot by 40-foot two-car driveway at 4 inches of compacted millings. Step 1: cubic feet = 20 × 40 × (4 ÷ 12) = 266.7 ft³. Step 2: weight = 266.7 × 110 = 29,333 lbs. Step 3: tons = 29,333 ÷ 2,000 = 14.7 tons. Step 4: add 10% waste = 16.1 tons. Order 17 tons.
Compaction note: loose millings compact 15 to 20%. If your target depth is 4 inches compacted, spread 5 inches of loose material before rolling. The calculator uses the compacted density, so the tonnage it shows is for the material after it is rolled into place.
Asphalt Millings Tips
Always compact in lifts. Apply millings in 2-inch layers and compact each layer before adding the next. Thick single lifts do not compact uniformly — the bottom stays loose while the surface appears firm. Two 2-inch compacted lifts produce a stronger, longer-lasting driveway than one 4-inch uncompacted layer.
Wet the millings before compacting. Spraying millings lightly with water before running the roller activates the residual asphalt binder and produces a firmer, more bound surface. The moisture helps the material compact without crumbling. Avoid over-wetting; the millings should hold shape but not be soupy.
Edge with a firm border. Millings at the edge of a driveway tend to crumble without containment. Installing a concrete curb, metal edging, or even pressure-treated landscape timbers along the sides keeps the millings from migrating over time. This is especially important on sloped driveways where water runoff can wash the edges out.
What to Buy
Asphalt millings source: call local paving companies first. Most paving contractors and municipalities generate millings from road resurfacing projects and sell them below the cost of new material. Some give millings away to avoid disposal fees. Search for "asphalt millings near me" or ask at a landscape supply yard.
Compaction equipment: rent a plate compactor for areas under 400 square feet. For larger driveways, rent a walk-behind vibratory drum roller (available at most equipment rental yards for $150 to $250 per day). Proper compaction is the most critical step — loosely spread millings will rut immediately under vehicle traffic and must be re-rolled.
Frequently Asked Questions
How much do asphalt millings cost per ton? +
Asphalt millings typically cost $10 to $30 per ton delivered, compared to $80 to $160 per ton for fresh hot mix asphalt. Prices vary by region and how close you are to an active paving project generating millings. Some contractors give millings away if you arrange your own transport. Bulk delivery minimums are usually 3 to 10 tons — call a local paving company to check pricing in your area.
How thick should I apply asphalt millings for a driveway? +
Apply millings in two layers: a 4-inch compacted base layer topped with a 2-inch finish layer, for 6 inches total compacted depth. On a solid existing surface, a single 3 to 4 inch compacted layer works. Millings compact 15 to 20 percent, so apply them about 20 percent deeper than your target finished depth. For a 4-inch finished layer, spread 5 inches of loose millings before compacting.
Are asphalt millings good for a driveway? +
Yes, for most residential applications. Millings compact into a stable surface that sheds water well and is durable under light vehicle traffic. They cost 50 to 70 percent less than hot mix asphalt. Trade-offs: millings stay somewhat loose on top in hot weather and can stick to shoes and tires, they require regrading every 2 to 4 years in heavy-use areas, and they do not form as smooth a surface as fresh HMA.
What is the difference between asphalt millings and gravel? +
Asphalt millings are ground-up recycled asphalt pavement, black to dark gray in color. Gravel is crushed stone. Millings compact more firmly than loose gravel because the residual asphalt binder activates under heat and pressure, locking the material together. Gravel tends to migrate and wash out more in heavy rain. Millings are the better choice for driveways where you want a firmer, more stable surface without the cost of new HMA.
How many tons of asphalt millings do I need for a driveway? +
A standard single-car driveway (10 × 40 feet) at 4 inches compacted depth needs about 8 tons of millings. A two-car driveway (20 × 40 feet) at 4 inches needs about 16 tons. Formula: (length × width × depth in inches ÷ 12) × 110 ÷ 2,000. Millings weigh about 110 lbs per cubic foot, lighter than hot mix at 145 lbs per cubic foot. Add 10% waste to the calculated tonnage for your order.
Do asphalt millings need to be compacted? +
Yes. Millings must be compacted with a roller or plate compactor to lock the material together. Without compaction, they remain loose and will shift under vehicle traffic. Rent a plate compactor from a hardware store for small areas (300 sq ft or less). For larger driveways, rent a walk-behind drum roller or ask your millings supplier if they offer compaction service. Compact in 2-inch lifts for best results.
Where can I buy asphalt millings? +
Call local paving companies — they are the main source of millings. Most paving operations generate millings when resurfacing roads and sell or give them away rather than haul them to a landfill. Some landscape supply yards and quarries carry millings. Search for "asphalt millings near me" or "RAP for sale" to find local suppliers. Delivery minimums are typically 3 to 10 tons; arrange local pickup if your project is smaller.
