Planning guide
What is gravel?
Gravel is graded natural or crushed stone used for drainage, decorative cover, driveways, and structural base courses. Angular crushed products lock together; rounded gravel moves more freely.
How this calculation works
The calculator finds the rectangular volume at the installed depth, then estimates weight using a typical bulk density. Supplier gradation and moisture can change actual tonnage.
How this estimate is calculated, converted, and rounded →
Choose an input for your project
Estimate structural base and finish gravel as separate layers.
| Use | Early planning range | Material consideration |
|---|---|---|
| Decorative bed | Often 2–3 in | Depth should cover the largest stones |
| Walking-path finish | Often 2–3 in | Use edging and a prepared base |
| Driveway base | Project-specific | Soil, frost, drainage, and loads govern |
| Drainage | Project-specific | Use clean stone compatible with the drain detail |
Enter compacted depth for base material and confirm compacted coverage with the supplier.
Common measurement mistakes
- Selecting rounded stone for a load-bearing base
- Assuming loose and compacted gravel have the same volume
- Measuring depth before removing soft soil
Planning tips
- Use geotextile where separation from soil is needed
- Compact base gravel in layers
- Confirm truck access before scheduling delivery
Gravel Calculator FAQs
What gravel depth should I use?
Paths commonly use 2–3 inches (5–8 cm) of finish gravel over a prepared base. Driveway base depth depends on soil, drainage, climate, and vehicle loads.
Should I use crushed or rounded gravel?
Angular crushed gravel interlocks and is usually better for compacted bases and driveways. Rounded gravel moves more freely and is commonly used for decorative applications and some drainage projects.
Does gravel volume change after compaction?
Yes. Base gravel consolidates as voids close during compaction. Use the material allowance as a planning aid and confirm compacted coverage with the supplier.