Use the quarry product density
Confirm gradation, moisture, loose bulk density, compaction allowance, and load increments with the quarry.
Continue planning
How the calculation works
We use 139 lb/ft³ FHWA aggregate-base value.
Formula: placed volume × 139 lb/ft³ ÷ 2,000
Worked example
A 20 × 10 ft base at 4 in depth is about 5.1 tons with 10% waste.
Measure the aggregate layer
Enter the finished footprint and specified compacted depth, separating courses with different materials.
Frequently asked questions
What does the 139 lb/ft³ value represent?
It is an FHWA estimating value for aggregate base, not a universal quarry density.
Should I order by tons or yards?
Use the unit sold by the supplier and its product-specific conversion whenever available.
Sources and assumptions
FHWA Federal Lands estimating unit weight for aggregate base.
Last reviewed: August 14, 2026. Read the methodology and sources.