Asphalt Milling Calculator: Free Online Milling Volume Estimator
Use our free asphalt milling calculator to estimate the volume, weight, and truckload count for pavement removal projects. Designed for milling contractors, paving crews, and demolition estimators, this tool accounts for milled depth, swell factor, and RAP (Reclaimed Asphalt Pavement) density. Plan your trucking logistics, recycling tonnage, and disposal costs accurately before the milling machine arrives on site.
How to use this calculator.
- Select your unit system. Choose imperial (feet, inches) or metric (meters, centimeters) using the toggle above.
- Enter the area to be milled. Input the length and width of the pavement section being removed. For multiple lanes or irregular shapes, calculate the total area first.
- Set the milling depth. Enter the depth of material to be removed. Cold planers can mill from 0.5 inches for surface correction up to 12 inches for full-depth removal.
- Adjust the swell factor. Milled asphalt occupies more volume than its compacted in-place state. The default swell factor is 1.30 (30% volume increase). Adjust based on your milling machine, tooth condition, and material type.
- Review your results. The calculator displays in-place volume, loose (swelled) volume, weight in tons, and the estimated number of truckloads for haul-off.
How do you calculate asphalt milling volume and weight for removal?
Milling volume is calculated like standard pavement volume, but the swell factor must be applied to account for the volume increase when compacted asphalt is ground into loose RAP.
In-Place Volume (cu yd) = Length (ft) × Width (ft) × Depth (in) ÷ 324
Loose Volume (cu yd) = In-Place Volume × Swell Factor
Weight (tons) = In-Place Volume (cu yd) × Density (lb/ft³) × 0.0135
Truckloads = Loose Volume (cu yd) ÷ Truck Capacity (cu yd)
Where:
- Swell Factor: The ratio of loose volume to in-place volume. Compacted asphalt pulverized by a milling machine expands by 25–35%. Use 1.30 as a standard value.
- In-Place Density: The density of the existing asphalt before milling, typically 140–150 lb/ft³. Use 145 lb/ft³ for standard HMA unless core samples indicate otherwise.
- Loose RAP Density: Milled RAP in a loose state has a density of approximately 115–130 lb/ft³ (roughly 1.55–1.75 tons per loose cubic yard).
- Truck Capacity: A standard end-dump trailer holds 18–22 cubic yards of loose RAP. Side-dump or belly-dump trailers may hold 25–30 cubic yards.
Example calculation.
Let's calculate the milling volume and trucking for a street resurfacing project.
Scenario: A city street is 500 ft long and 24 ft wide. The specification requires milling 3 inches of existing asphalt before overlaying. Swell factor is 1.30. Trucks hold 20 cubic yards each.
- Calculate in-place volume: 500 ft × 24 ft × 3 in ÷ 324 = 111.1 cu yd
- Calculate loose volume: 111.1 cu yd × 1.30 = 144.4 cu yd
- Calculate weight for recycling credit: 111.1 cu yd × 145 lb/ft³ × 0.0135 = 217.5 tons
- Calculate truckloads: 144.4 cu yd ÷ 20 cu yd/truck = 7.2 trucks (round up to 8)
- Estimate haul-off cost: At $85 per truckload, 8 trucks × $85 = $680 total hauling cost
Result: This milling project produces approximately144 cubic yards of loose RAP weighing218 tons, requiring 8 truckloads for haul-off.
Tips from the field.
- RAP has value: do not dump it. Reclaimed asphalt pavement is routinely recycled into new HMA at 15–25% content. Many asphalt plants pay $5–$15 per ton for clean RAP. Factor this credit into your project budget.
- Swell factor changes with depth. Shallow milling (0.5–2 inches) produces finer material with higher swell (1.35–1.40). Deep milling (4+ inches) produces coarser RAP with lower swell (1.20–1.25). Adjust accordingly.
- Worn teeth increase swell. Dull milling drum teeth tear rather than cut the asphalt, producing irregular, fluffy RAP with higher swell. Replace teeth on schedule for consistent results.
- Moisture adds weight. Wet RAP can weigh 15–20% more than dry RAP. If milling after rain, your trucks may hit weight limits before they are volumetrically full.
- Coordinate milling and paving. The milled surface is the new subgrade for the overlay. Do not leave milled pavement exposed to traffic for more than 48 hours: surface deterioration and raveling will occur.
Disclaimer: This calculator provides estimates for planning purposes only. Actual material requirements vary based on site conditions, mix design, compaction, and waste. For structural designs or load-bearing applications, consult a licensed civil engineer. PavementCalculator.com assumes no liability for material overages or shortages.
Cost, price, and density figures on this page reflect approximate U.S. averages as of August 2026 and vary by region, supplier, and material availability.
Frequently asked questions.
How do I calculate asphalt milling volume?
Multiply area (sq ft) by milling depth (in feet) to get cubic feet, then divide by 27 to convert to cubic yards. For example: a 10,000 sq ft parking lot milled at 2 inches = 10,000 × (2÷12) ÷ 27 = 61.7 cu yd of milled material. Milled asphalt is looser than in-place asphalt (swell factor of 1.2-1.4), so actual trucking volume is higher. Use our calculator for exact estimates.
How much does milled asphalt weigh?
In-place compacted asphalt at 145 lb/ft³: milled material in its loose state weighs approximately 100-115 lb/ft³ due to the swell factor (material becomes less dense when broken up). One cubic yard of milled asphalt weighs approximately 1.35-1.55 tons (2,700-3,100 lbs). For trucking calculations, assume 1.4 tons per cubic yard of milled material. A standard tandem dump truck (16 tons) can haul approximately 11-12 cubic yards of millings.
What is the typical milling depth?
Milling depths vary by project: Surface milling (remove surface course only) = 1-2 inches. Partial-depth milling (remove surface + part of binder) = 2-4 inches. Full-depth milling (remove all asphalt to base) = typically 4-8 inches, but can be deeper. Milling machines can mill up to 12-14 inches in a single pass depending on the machine. Milling depth is specified by the engineer based on pavement condition survey results.
What is RAP (Reclaimed Asphalt Pavement)?
RAP is milled or reclaimed asphalt pavement that is recycled into new asphalt mixes. It's one of the most recycled materials in the US: over 95% of milled asphalt is reused. RAP contains valuable asphalt binder and aggregate. New asphalt mixes can contain 10-50% RAP depending on specifications. Using RAP reduces costs, conserves resources, and can perform as well as or better than all-virgin mixes when properly designed.
How many truckloads will I need for milled asphalt?
Divide the total tonnage of milled material by the truck capacity. For a 10,000 sq ft parking lot milled at 2 inches: 61.7 cu yd × 1.4 tons/yd³ (loose) = 86.4 tons ÷ 16 tons/truck = 5.4 ≈ 6 truckloads. For full-depth milling at 6 inches: 3× more material = 18 truckloads. Coordinate milling and trucking operations carefully: production stops when trucks are full and there's nowhere to put the material.
Can milled asphalt be reused on site?
Yes, milled asphalt (RAP) can be reused on site in several ways: (1) As aggregate base for new pavement: compact RAP forms an excellent base material. (2) As fill material for shoulders or low areas. (3) Processed on site with rejuvenating agents and re-laid as new asphalt (Cold In-place Recycling, CIR). (4) Used for temporary roads, parking areas, or haul roads. On-site reuse eliminates trucking and disposal costs, making it both economical and environmentally friendly.
What is the swell factor for milled asphalt?
Milled asphalt typically has a swell factor of 1.25 to 1.35, meaning it occupies 25–35% more volume in its loose state than its compacted in-place state. The standard assumption is 1.30. Finer milling (shallow depths, micro-milling) produces higher swell; coarser milling produces less.
How many tons of RAP per mile of roadway?
A one-mile (5,280 ft) section of a 12-ft-wide lane milled 2 inches deep yields approximately 1,400 tons of RAP in-place, or roughly 1,800 loose cubic yards after swell. Multiply by the number of lanes for your total.
How deep can a milling machine cut?
Standard cold planers can mill from 0 to 13 inches in a single pass. Full-lane machines (half-lane or full-lane width) typically mill 0–6 inches for resurfacing prep. Dedicated deep-cut machines with wider drum spacing can reach 13 inches for full-depth removal.
What does it cost to mill and haul asphalt?
Milling costs $0.30–$0.75 per square foot per inch of depth depending on project size and depth. Hauling costs $75–$125 per truckload (20–25 mile radius). RAP disposal fees are $0–$20 per ton depending on whether the plant accepts it for free (recycling credit) or charges a tipping fee.