Gravel & Aggregate Calculators

Gravel and aggregate calculators size driveways, drainage beds, and base layers by cubic yard and ton, covering gravel, pea gravel, crushed stone, and more.

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Frequently asked questions

What's the difference between gravel, crushed stone, and crusher run?

Gravel is a general term for loose rock; crushed stone is angular machine-crushed rock that locks together; crusher run includes stone dust ("fines") that compacts into a dense, firm base — which is why it weighs more per cubic yard (about 1.5 tons vs 1.35-1.4 for the others).

Why is gravel sold by the ton but measured by the yard?

You measure your project by volume (length × width × depth), but suppliers weigh trucks at the quarry scale. Every calculator in this category does the conversion for you using each material's typical density.

How deep should a gravel layer be?

Decorative and walkway layers: 2-3 inches. Driveways: 4-6 inches of surface gravel, ideally over a compacted crusher-run base. Drainage applications like French drains typically use 3-4 inches around the pipe.