Quick answer
There is no single gravel depth for every project. Decorative beds, walkways, drainage layers and driveways have different performance needs, and structural or drainage applications should follow project-specific guidance.
Step by step
- Identify the use. Decorative cover and load-bearing bases are different jobs.
- Check the subgrade and base. Existing conditions affect required build-up.
- Choose the specified depth. Use contractor, manufacturer or project guidance.
- Calculate volume. Use the chosen installed depth in the gravel calculator.
Formula or rule of thumb
Example
A 100 ft² decorative bed at 2 in deep uses 100 × 0.167 ≈ 16.7 ft³ before any allowance.
Common mistakes
Do not borrow a driveway depth for a decorative bed or vice versa. Compaction, drainage and load requirements change the specification.
Planning note: product yields, installation methods, site conditions and local requirements can change the final quantity. Use the exact manufacturer or supplier information before purchasing.
FAQ
Does gravel compact?
Many aggregates settle or compact, so delivered and installed volume may differ.
Is pea gravel good for driveways?
Material suitability depends on the project design and local conditions; use appropriate aggregate guidance.
Do I need landscape fabric?
That depends on the project goals, soil conditions and installation method.