Gravel Calculator
Coverage math for driveways, paths, and French drains — not a paving bid. Click any i for detail.
Bed or driveway
Area (sq ft)
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Area
Surface area in square feet. |
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Depth (inches)
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Depth
Loose depth after spreading. Paths often 2–3 in; drives 4–6 in. |
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Density (tons/yd³)
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Density
Loose gravel is often ~1.3–1.5 tons per cubic yard. Compacted weighs more. |
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Waste (%)
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Waste
Extra for compaction, irregular edges, and settling. |
How to use this calculator
- Enter area in square feet.
- Set depth in inches.
- Confirm density with your supplier if you buy by the ton.
- Add waste for compaction.
Results explained
Yards = (sq ft × depth in inches) ÷ 324. Tons = yards × density. Distinct from the gravel driveway *cost* calculator, which prices labor.
Quick reference: gravel coverage
1 cubic yard covers about 108 sq ft at 3 inches.
| Item | Detail |
|---|---|
| 3 in depth | ≈ 0.93 yd³ per 100 sq ft |
| 4 in depth | ≈ 1.23 yd³ per 100 sq ft |
| Typical density | 1.3–1.5 tons/yd³ |
| Pea gravel | Often toward the lighter end |
Order by the yard for delivery; bags are 0.5 ft³–0.5 ft³ each at big-box stores.
How the estimate is built
cu yd = (sq ft × inches) ÷ 324. Tons = cu yd × (tons per yd³).
Example scenario
200 sq ft at 3 in = 1.85 yd³ net ≈ 2.04 yd³ with 10% waste.
FAQ
Driveway cost vs this page?
Cost calculator = labor + materials dollars. This page = how many yards/tons.
Should I compact?
Yes on drives. Add depth or waste — compacted gravel occupies less volume.
Crushed stone instead?
Use the stone calculator and a slightly higher density.