Gravel vs. Crushed Stone: What's the Difference?
Quick answer: crushed stone is mechanically crushed quarry rock with sharp, angular faces that lock together and compact into a stable layer. Gravel is naturally rounded stone that drains well and looks good but shifts under load. Use crushed stone where you need strength (driveway bases, under pavers, behind retaining walls) and gravel where you want drainage or a decorative finish. Both weigh about the same, so the gravel calculator and crushed stone calculator estimate tonnage the same way.
Shape is the real difference
Everything else follows from one thing: crushed stone is angular, gravel is rounded.
- Crushed stone comes from blasting and crushing larger rock, leaving sharp edges and flat faces. Those faces interlock, so a compacted layer holds its shape and carries load.
- Gravel is weathered, naturally rounded stone (think river rock or pea gravel). The smooth surfaces slide past each other, which is great for drainage but poor for stability.
Drainage vs. compaction
This is the practical trade-off:
| Crushed stone | Gravel | |
|---|---|---|
| Compacts to a hard surface | Yes (especially crusher run) | Poorly |
| Free drainage | Best with clean, single-size stone (#57) | Yes |
| Stays put under tires | Yes | Round gravel migrates |
| Decorative look | Utilitarian | Often nicer |
If you need a layer that packs solid — a driveway base, a paver sub-base, a shed pad — reach for crusher run or a dense-grade crushed aggregate. If you need a layer that lets water through — a French drain, the open base of a permeable patio — clean #57 crushed stone or rounded gravel both work.
Weight and ordering are the same
Here's the good news for estimating: both materials weigh roughly 1.3–1.7 tons per cubic yard, so you size them identically. Measure your area, set your depth, and read the cubic yards and tons. Use the aggregate calculator if you're buying a general sub-base mix, or the material-specific calculators if you know exactly what you're ordering.
So which should you use?
- Driveway base, paver base, retaining-wall backfill, shed pad → crushed stone (crusher run for compaction, #57 for drainage).
- Decorative beds, walkways, pea-gravel patios, top-dressing → gravel.
- A full driveway → both: crushed stone for the compacted base, and either an angular #57 surface or a decorative gravel on top.
Whatever you pick, order about 10% extra for compaction and spillage, and quote it in tons when you call the yard.
Frequently asked questions
Is crushed stone better than gravel for a driveway?+
For the structural layers of a driveway, yes. Crushed stone's angular faces lock together and compact into a stable base, while rounded gravel shifts under load. Many driveways use crushed stone for the base and a decorative gravel only as a top dressing.
Do gravel and crushed stone weigh the same?+
Roughly. Both run about 1.3 to 1.7 US tons per cubic yard. Crushed stone with fines (like crusher run) sits at the heavier end because the dust fills the gaps; clean, rounded gravel is a little lighter.
Which is cheaper, gravel or crushed stone?+
Prices are usually close and depend more on what's quarried near you than on the material type. Crushed stone is processed (crushed and screened), so it can cost slightly more than pit-run gravel, but the difference is small next to delivery cost.