Why does gravel weight vary?

Weight changes with material type, moisture, compaction and source. Confirm the supplier's current density before ordering.

Does this design a base course?

No. Confirm depth, drainage, geotextile, compaction and local project requirements independently.

Landscaping calculator

Gravel calculator

Bulk gravel volume, estimated weight, and a visible delivery allowance.

Calculator result and formula

Bulk gravel order: 1.3 yd³

Formula: Area length × width × depth ÷ 27 × (1 + waste)

Formula ID: LAND-GRAVEL-001 · Version 1.0.0 · Published · Last reviewed Aug 26, 2026.

Inputs

Area length: Finished gravel area length Default: 12.
Area width: Average finished gravel area width Default: 10.
Installed depth: Compacted gravel depth Default: 3.
Supplier density: Tons per cubic yard; confirm material-specific density Default: 1.35.
Waste factor: Allowance for compaction, irregular edges, and site conditions Default: 10.

How this calculator works

This calculator converts a rectangular gravel area and compacted depth into bulk volume, then applies a documented allowance before delivery rounding and density-based weight estimation.

Measure the finished gravel length, average width and compacted installed depth.
Enter the supplier's density in tons per cubic yard for the selected material.
Use the rounded volume and estimated weight as a starting point for a supplier quote and delivery discussion.

Worked example: Example: a 12 ft × 10 ft area at 3 in depth holds about 1.11 yd³ before waste. With 10% allowance, the bulk order rounds to 1.3 yd³; at 1.35 tons/yd³, that is about 1.76 tons.

Assumptions and limitations

Gravel area is treated as rectangular using average width.
The entered density is a supplier-specific planning input in tons per cubic yard.
Bulk volume is rounded up to the next 0.1 yd³ after allowance.

Common mistakes to avoid

Confirm the measurement basis and units before using the result.
Keep waste or allowance visible and adjust it for the actual job conditions.
Confirm supplier packaging, delivery increments, specifications, and final site requirements before ordering.

Calculator disclaimer

This planning calculator does not determine structural design, code compliance, installation requirements, or guaranteed pricing. Confirm final requirements with the appropriate responsible professional, authority, manufacturer, and supplier.

Formula review and sources

Internal QA complete · independent external review pending · 1 source reference.

North Bay Materials: Landscape Materials Density Chart

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