Crushed Asphalt Calculator
Calculate crushed asphalt millings (RAP) tonnage, cubic yards, and compacted coverage for affordable rural driveways and parking pads.
= 13.76 Metric Tonnes (7.72 cu yds)
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What Is a Crushed Asphalt Calculator?
A crushed asphalt calculator estimates the volume and weight of asphalt millings (also called Reclaimed Asphalt Pavement or RAP). Milled from road resurfacing projects, crushed asphalt hardens over time under summer sun and vehicle pressure, providing an affordable semi-solid alternative to gravel.
How to Use This Calculator
- Enter length and width of the driveway or parking area in feet.
- Enter uncompacted spread depth (typically 3 to 4 inches; compacts down by ~20%).
- View the total tons of asphalt millings needed and cubic yard volume.
- Review roller compaction and diesel/oil bonding recommendations.
Crushed Asphalt Millings Tonnage Formula
\text{Tons} = \frac{\text{Sq Yds} \times \text{Depth (in)} \times 104}{2000} \times 1.05Crushed asphalt millings have a bulk compacted density of approximately 104 lbs/sq yd per inch of thickness (~1.85 tons/cu yd).
Worked Example
Scenario: Surfacing a 100 ft by 12 ft farm driveway with 3 inches of compacted crushed asphalt millings.
Square footage: 100 × 12 = 1,200 sq ft (133.33 sq yds).
Tonnage: 133.33 sq yds × 3 in × 104 lbs = 41,600 lbs.
Add 5% grade tolerance: (41,600 ÷ 2000) × 1.05 = 21.84 tons.
Tips & Key Notes
- Spread asphalt millings during hot summer months; ambient heat softens residual bitumen, allowing it to bond into a solid semi-permanent crust.
- Compact millings thoroughly with a heavy vibrating roller (minimum 3 to 5 tons); driving a pickup truck over it is insufficient.
- Crushed asphalt generates far less dust than limestone gravel and will not wash out in heavy rainstorms.
Frequently Asked Questions
Does crushed asphalt harden like real asphalt?
Yes! Under high summer heat and vehicle compaction, the residual petroleum tar in the millings melts and binds together, creating a durable, hardened surface that resembles aged asphalt.
How much does crushed asphalt cost compared to new hot mix asphalt?
Crushed asphalt millings typically cost 50% to 70% less than new hot mix asphalt, often costing roughly the same as crushed stone gravel.
How deep should asphalt millings be installed?
A minimum depth of 3 to 4 inches is recommended. Millings compact down by approximately 20% to 25% after heavy rolling.
Can you sealcoat crushed asphalt millings?
Yes. After the millings have compacted and hardened for one full summer season, applying an asphalt emulsion sealer bonds loose surface granules into a uniform black driveway.
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