Road Base Calculator

All construction tools

Estimate the amount of road base material required for driveways, paths, and parking areas.

Project Dimensions

Length (ft) (ft)

Width (ft) (ft)

Depth (in) (in)

Density (lb/ft³) (lb/ft³)

Material Estimate

Enter dimensions to calculate road base needs

About this calculator

Overview

Road base is a mixture of crushed stone and dust that compacts to form a hard, stable surface. It is the essential foundation for pavers, asphalt, and concrete driveways.

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Pro Tips

Compact the material in 2-inch layers (lifts) using a plate compactor for best results.
The material should be slightly damp (but not dripping) during compaction.
Standard residential driveways typically require a 4 to 6-inch thick layer of road base.

Fun Facts

"Commonly known as 'Crusher Run', 'ABC', or '21A' depending on the region."
"Properly compacted road base can have a density of 145 lbs per cubic foot."
"Road base provides a stable platform and allows for proper drainage under permanent surfaces."

Formula: Volume (yd³) = [Length (ft) × Width (ft) × (Depth (in) / 12)] / 27 Weight (Tons) = [Volume (ft³) × Density (lb/ft³)] / 2,000