This tool stays in volume because gravel weight varies with gradation, stone type, moisture, voids, and compaction. Use supplier density for a weight conversion.
01 / Formula
How this is calculated
Cubic yards = area sq ft × (depth in ÷ 12) ÷ 2702 / Assumptions
What the estimate assumes
- ✓Installed depth is uniform.
- ✓Allowance is explicit.
- ✓Compaction and weight conversions are not hidden.
03 / Worked example
See the math in context
A 12 × 30 ft area at 3 inches deep is 90 cubic feet, or 3.33 cubic yards before allowance.
04 / Guidance
Confirm compacted versus loose depth
Base material may be specified by compacted thickness while delivery is loose. Confirm lift, compaction, and conversion expectations with the project documents or supplier.
Questions
Frequently asked
How do I measure an irregular area?+
Split the bed or lawn into rectangles, circles, and triangles, calculate each area, then add them. Measure narrow curves in shorter sections for a better approximation.
Should I include extra material?+
Use a visible allowance for grade variation, settlement, compaction, spillage, cuts, or future repair as appropriate. The right percentage depends on the material and site.