How deep to go
| Use | Published figure | Source |
|---|---|---|
| Pea gravel, light traffic | 2 to 3 in | hellogravel.com |
| Crushed stone, heavier use | 3 to 4 in | hellogravel.com |
| Decomposed granite | 2 to 3 in | hellogravel.com |
Hello Gravel's path guide puts most garden paths at 2 to 4 inches: 2 to 3 inches for light foot traffic and 3 to 4 inches for paths that take wheelbarrows. It suggests adding 10 to 20% for compaction and settling.
Working it out
Cubic yards = area (sq ft) × depth (in) ÷ 12 ÷ 27. Tons = cubic yards × weight per cubic yard.
Example: 30 × 3 ft at 3 inches with 10% extra is 0.92 cubic yards of pea gravel, about 1.19 tons at 1.30 tons per cubic yard.
Rochester Concrete Products' install guide adds 10% for compaction and uneven ground.
Common questions
How much gravel do I need for a gravel path?
Measure the area, choose a depth from the table above and enter both in the calculator. It gives cubic yards, tons and bags.
Should I order extra?
Rochester Concrete Products' install guide adds 10% for compaction and uneven ground. Loose stone also compacts, so a compacted layer needs more loose material than its finished depth suggests.
Sources
- https://hellogravel.com/guides/how-much-aggregate-do-i-need-for-a-garden-path/
- https://hellogravel.com/guides/2025-gravel-prices-per-ton-delivered-cost-calculator-and-regional-rates/