Asphalt Base Material Calculator
Estimate aggregate base quantity—not structural design—from area, compacted thickness, and placed bulk density.
Aggregate base quantity inputs
Enter a project-specific placed bulk density.
Estimated quantity
Enter positive area, thickness, and density values.
Result scope and assumptions
Results cover only compacted aggregate base volume and estimated weight. Replace the starting density with quarry or test data for the specified material.
Formula
US tons equal cubic yards × 27 × bulk density ÷ 2,000.
Worked example
A 1,000 sq ft area at 6 inches contains 500 ft³ or 18.52 yd³. At an assumed 120 lb/ft³, that is 30 US tons before allowance.
Reference table for 1,000 sq ft
| Compacted depth | Volume | Weight at 120 lb/ft³ |
|---|---|---|
| 4 in | 12.35 yd³ | 20 US tons |
| 6 in | 18.52 yd³ | 30 US tons |
| 8 in | 24.69 yd³ | 40 US tons |
Common mistakes
- Treating this quantity tool as a base-depth recommendation.
- Using an unrelated density for another aggregate or moisture condition.
- Ignoring grade corrections, subgrade replacement, and compaction settlement.
Confirm before ordering
- Specified aggregate designation, gradation, moisture, and placed density;
- excavation limits, compacted depth, lift limits, drainage, and testing;
- quarry conversion, minimum delivery, truck payload, and allowance reason.
Source and related tools
FHWA's pavement recycling resource illustrates why granular-base material must be evaluated separately from asphalt mixture. Check the density guide, use the millings calculator or core asphalt calculator, and review base-related treatment decisions in the pavement decision guide.