Road Base Calculator
Uses crushed stone density for structural base under asphalt or heavy drives.
Step 1: Units
Step 2
Enter project measurements
Use decimals if needed (e.g. 3.5).
Step 3
How to use this calculator
Length and width of prepared subgrade; depth is compacted design thickness.
What the math is doing
Volume = length × width × depth; weight = volume × density.
Frequently asked questions
Proof roll?
Compaction testing is geotech scope.
Geotextile?
Add rolls separately.
Lift thickness?
Keep lifts per spec.
CBR?
Design parameter outside this tool.