Gravel planning
How Deep Should Gravel Be for Paths and Small Pads?
A walking path usually needs 2 to 3 inches of surface gravel over a compacted base. Bases under pavers and small pads are commonly 4 to 6 inches. Depth drives the order: every extra inch over 100 square feet adds about 0.3 cubic yards.
Open the mulch, soil, and gravel calculatorTypical gravel depths by use
These are common starting ranges for residential projects. Soft or wet soil, vehicle traffic, and freeze-thaw climates all push the numbers up, so check local practice for anything load-bearing.
| Project | Typical depth | Notes |
|---|---|---|
| Decorative bed or rock mulch | 2 inches | Over landscape fabric |
| Garden or walking path | 2 to 3 inches | Over a compacted base on soft ground |
| Base under pavers or a patio | 4 to 6 inches | Compacted in layers |
| Shed or small equipment pad | 4 to 6 inches | Extend the pad past the footprint |
| Driveway | 4 to 6 inches or more | Built in layers, larger stone at the bottom |
Turn depth into cubic yards
Convert depth to feet by dividing inches by 12, multiply by length and width to get cubic feet, and divide by 27 for cubic yards.
Example: a path 3 feet wide and 30 feet long at 3 inches deep is 3 x 30 x 0.25 = 22.5 cubic feet, or 0.83 cubic yards. Round up to 1 yard to allow for uneven ground.
Cubic yards vs tons
Many quarries sell stone by weight. Gravel commonly weighs 1.2 to 1.5 tons per cubic yard depending on the stone and how wet it is, so the 0.83 yard path above is a little over 1 ton. Ask the supplier for their conversion, because it changes with the product.
Why the base matters more than the top
Loose gravel on bare soil sinks and spreads. A lasting path has three parts: the soil dug out and compacted, a base of angular crushed stone that locks together, and a thinner top layer of the gravel you actually want to see. Edging keeps the surface from migrating into the lawn.
When ordering, calculate the base and the top layer separately because they are usually different materials at different prices.
- Paths need 2 to 3 inches of surface gravel, and bases need 4 to 6 inches.
- Cubic yards = length x width x (depth in inches / 12) / 27.
- Gravel is often sold by the ton at roughly 1.2 to 1.5 tons per cubic yard.
Run the numbers
The Mulch, Soil, and Gravel Calculator applies this math to your own measurements and shows each step. Best for landscaping beds, gravel paths, raised areas, and topsoil orders.