Crushed Stone Calculator
Estimate dense graded stone for driveways under asphalt or as a working base layer.
Step 1: Units
Step 2
Enter project measurements
Use decimals if needed (e.g. 3.5).
Step 3
How to use this calculator
Measure the coverage rectangle and average depth you want after compaction. Deeper sections can be averaged or split into multiple runs.
What the math is doing
Volume is length × width × depth. Weight multiplies volume by a typical bulk density for that material.
How to measure
Stake the area and run a string line for straight edges. Depth is from existing grade to finished grade.
Frequently asked questions
Sub-base vs top size?
Layer lifts per geotechnical guidance; this is one combined volume.
Compaction tests?
Proctor density is outside this calculator’s scope.
Winter frost?
Thicker bases are common in cold climates; adjust depth field.
Geotextile separation?
Volume math is unchanged; separation improves performance.