Gravel vs. Crushed Stone

Both fill driveways, paths, and drainage beds, but they aren't interchangeable. Here's what actually differs between them, and how to pick the right density in the Gravel Calculator.

What's the actual difference?

Gravel is naturally occurring rock, worn rounded or semi-rounded by water or weathering over time — think riverbed or pit-run gravel. Crushed stone starts as larger quarried rock that's mechanically crushed to size, leaving angular, jagged edges. That shape difference — round versus angular — is what drives nearly every practical difference between them: how they pack, how they drain, and how they perform under load.

Common uses

  • Crushed stone — driveway and paver base layers, where interlocking angular pieces resist shifting under load.
  • Standard gravel — decorative driveway topping, garden paths, and fill where appearance or drainage matters more than load-bearing interlock.
  • Pea gravel (a smaller, rounded gravel) — walkways, playgrounds, and drainage where a smooth, loose surface is preferred.

These are general starting points, not a substitute for a supplier's or contractor's recommendation for your specific soil and load conditions.

Why crushed stone weighs more

Angular pieces nest together more tightly than rounded ones, leaving less air space per cubic yard — so a load of crushed stone typically weighs a bit more than the same volume of standard gravel. This site's Gravel Calculator reflects that directly: its material presets use about 1.4 tons per cubic yard for standard gravel versus about 1.5 for crushed stone. Pick the material that matches what you're actually ordering — the weight (and cost) estimate depends on it.

Drainage and compaction

Crushed stone's angular voids tend to create more effective drainage channels and compact into a firmer, more stable base — part of why it's the common choice under pavers and driveways. Rounded gravel drains adequately too, but compacts less firmly and can migrate or scatter more underfoot or under vehicle weight over time.

Estimate your material

Use the Gravel Calculator for either material — select "Gravel (standard)" or "Crushed stone" from the Material dropdown to get tons and cubic yards using the right density for what you're ordering.

Frequently asked questions

Is crushed stone the same as gravel?

No. Gravel is naturally occurring rock, typically rounded or semi-rounded from water or weathering erosion. Crushed stone is mechanically crushed from larger rock, giving it angular, jagged edges. The shape difference is what drives most of the practical differences between them.

Which is better for a driveway base, gravel or crushed stone?

Crushed stone's angular edges interlock under compaction, making it the more common choice for a load-bearing driveway base. Rounded gravel compacts less firmly and can shift more under vehicle weight. This isn't a strict engineering rule for every site, though — soil conditions and local practice matter, so check with a supplier or contractor for anything structural.

Does crushed stone drain better than gravel?

Both drain well since neither holds water like soil does, but the angular voids between crushed stone pieces often provide more effective drainage channels than the tighter packing of rounded gravel. The exact answer depends on the specific gradation (particle size mix) of the material, not just whether it's gravel or crushed stone.

Why does crushed stone weigh more than gravel per cubic yard?

Angular pieces pack together more tightly than rounded ones, leaving less air space per cubic yard — so a cubic yard of crushed stone typically weighs a bit more. This calculator's presets reflect that: standard gravel is about 1.4 tons per cubic yard, crushed stone about 1.5.