Gravel Calculator · Practical guide
Crushed Stone vs. Gravel for a Driveway
Both cover the same ground, but angular crushed stone locks in place while rounded gravel migrates under tires.
At a glance
The Short Answer
For driveways, crushed stone usually wins: its angular, machine-broken faces interlock under compaction into a firm, rut-resistant surface. Rounded gravel, smoothed by water erosion, rolls and scatters under tires and suits paths and landscaping better than driving surfaces.
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Gravel Calculator
Enter your own values, then compare the result with the examples below.
Gravel Estimate
Add 5-10% extra to account for compaction and uneven coverage.
Side-by-Side Comparison
| Factor | Crushed Stone | Rounded Gravel / Pea Gravel |
|---|---|---|
| Shape | Angular, machine-broken | Rounded, water-worn |
| Stability | Locks together when compacted | Shifts under tires and foot traffic |
| Weight per cubic yard | ~1.5 tons | ~1.3-1.4 tons |
| Best use | Driveways, base layers | Paths, beds, drainage, decor |
What the Density Difference Costs You
Because crushed stone weighs about 1.5 tons per cubic yard against 1.3 for pea gravel, covering a 12 × 50 ft driveway at 4 inches deep (7.4 cubic yards) takes about 11.1 tons of crushed stone versus 9.6 tons of pea gravel. If your supplier prices by the ton, the heavier material costs more for the same coverage — run both options in the calculator above by switching the material type.
A Practical Build-Up
Many driveway builds use both: 4 inches of coarse crushed stone compacted as the base, topped with 2 inches of smaller stone for the driving surface. Whatever you choose, compact in layers and order 5-10% extra to cover compaction loss of about 10-15%.
Frequently Asked Questions
Is pea gravel good for driveways?
Generally no. The small rounded stones never lock together, so tires kick them aside and ruts form quickly. Pea gravel excels at paths, patios, and garden beds instead.
What size crushed stone is best for a driveway base?
A mix containing 1- to 2.5-inch stone with fines (often called crusher run or road base) compacts hardest. A smaller 3/4-inch stone works well as the top layer.
Which is cheaper, crushed stone or gravel?
Prices are close per ton, but crushed stone weighs about 10% more per yard, so per ton it covers slightly less area. Get quotes in the same unit before comparing.
How often does a gravel driveway need topping up?
Expect to add a fresh inch every one to three years depending on traffic and drainage. Compaction and migration typically consume 10-15% of the original volume early on.