How Much Gravel for an 18 Foot Circle?
How much gravel for an 18 foot circle: about 4.4 tons at 4 inches deep. A circle 18 feet across covers about 254.5 square feet (3.1416 × 9²).
Volume and tonnage calculator →The math
- Area: 254.5 sq ft.
- Depth in feet: 4 ÷ 12 = 0.333 ft.
- Cubic yards: 254.5 × 0.333 ÷ 27 = 3.14 yd³.
- Tons: × about 1.4 tons per yard = 4.4 tons.
The gravel calculator does this for any size.
Related: How Much Pea Gravel for an 18 Foot Circle?
Gravel needed by depth
| Depth | Cubic yards | Tons of gravel | Tons +10% |
|---|---|---|---|
| 2 in | 1.57 | 2.2 | 2.4 |
| 3 in | 2.36 | 3.3 | 3.6 |
| 4 in | 3.14 | 4.4 | 4.8 |
| 6 in | 4.71 | 6.6 | 7.3 |
Using a circle of stone
A round gravel area is easy to lay out with a stake and string at the center. Set flexible edging along the line and lay fabric inside before the stone goes in. Do not pile stone against tree trunks; leave a gap at the base.
Related: How Much River Rock for an 18 Foot Circle?
Getting it delivered
Most quarries and landscape yards deliver by the ton; ask whether there is a minimum and a delivery fee, and where the driver can dump without damaging your lawn. Gravel is a broad label, so confirm whether the yard means crushed or rounded stone and whether it carries fines. Round up by about 10 percent for compaction and uneven ground.
Common mistakes
The most frequent problem is ordering for the finished depth without allowing for compaction, which can shrink a loose layer by 10 to 20 percent. Another is skipping fabric on soft soil and watching the stone vanish into the mud over the first wet season. Spreading everything in one thick layer instead of compacted lifts also leaves a soft, rutted surface.
Planning the cost
Quarries and landscape suppliers set their own prices, and they change by region and season. Get the price per ton, the delivery fee and the minimum order. If two products will both work, compare cost per square foot at your depth rather than cost per ton.
Questions people ask
How many tons of gravel for an 18 ft circle?
About 4.4 tons at 4 inches deep.
How many square feet is an 18 foot circle?
About 254.5 square feet.
How many tons of gravel are in a cubic yard?
Roughly 1.4 tons for planning, but suppliers vary with stone size and moisture.
Do I need to compact it?
Yes for anything that carries weight. Compact in lifts of a few inches with a plate compactor.
Related guides
- Gravel for a Fire Pit Area: Best Types and Depth
- How Much Does a Ton of Gravel Cover? Depth Chart
- Tons to Cubic Yards for Gravel: Conversion Chart
- Crushed Stone vs Gravel: Differences and Best Uses
- Geotextile Fabric for Driveways: Woven vs Nonwoven and How Much You Need
- Compacting a Driveway Gravel Base in Lifts
- How Much Crushed Stone for an 18 Foot Circle?
- How Much #57 Stone for an 18 Foot Circle?
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