How deep to go
| Use | Published figure | Source |
|---|---|---|
| DG paths and patios | 2 to 3 in | earthstonerock.com |
| DG driveways | 4 to 6 in | earthstonerock.com |
| Base under the DG | 4 to 6 in compacted crushed rock | earthstonerock.com |
Earthstone's installation FAQ lists 2 to 3 inches of decomposed granite for pathways and patios and 4 to 6 inches for driveways, over a base of 4 to 6 inches of compacted crushed rock or DG. Work out the base as a second layer.
Working it out
Cubic yards = area (sq ft) × depth (in) ÷ 12 ÷ 27. Tons = cubic yards × weight per cubic yard.
Example: 30 × 4 ft at 3 inches with 10% extra is 1.22 cubic yards of decomposed granite, about 1.71 tons at 1.40 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 decomposed granite 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.
Related calculators
Sources
- https://www.earthstonerock.com/pages/frequently-asked-questions
- https://hellogravel.com/guides/2025-gravel-prices-per-ton-delivered-cost-calculator-and-regional-rates/
- https://homeguide.com/costs/gravel-prices