How to estimate gravel for a driveway or path
Area × depth gives volume; convert to cubic yards and account for compaction.
Gravel is typically ordered by volume (cubic yards). Your measurements are usually area and target depth, so the estimate is a volume conversion problem.
The two common mistakes are forgetting compaction and using the wrong depth.
Step-by-step: gravel math
- Measure the area to cover (length × width, or break irregular shapes into rectangles).
- Choose a compacted depth target (often a few inches, depending on use).
- Convert area × depth to volume (cubic feet or cubic meters).
- Convert volume to cubic yards for ordering.
- Add a buffer for compaction and uneven grade, then round up.
Practical tips
- Base layers and top layers can have different depths—estimate them separately.
- Compaction reduces volume; ordering slightly extra prevents shortages.
- Edging and containment keep gravel from spreading.
- Confirm the material type and density with your supplier if you’re converting to tons.
Want the cubic yard estimate fast?
Use our gravel calculator and share a link that keeps your inputs.
FAQ
How deep should gravel be for a driveway?
It depends on soil and use. Many driveways use a thicker compacted base with a thinner top layer. Estimate layers separately for better results.
Should I order gravel by tons or cubic yards?
Suppliers vary. Cubic yards are common; tons require density. If ordering by tons, confirm the supplier’s conversion for the specific material.
Do I need to account for compaction?
Yes. Compaction can reduce the installed height, so adding a small buffer helps ensure you don’t run short.
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