How Much Crushed Stone for an 18 Foot Circle?
How much crushed stone 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 crushed stone calculator does this for any size.
Related: How Much Gravel for an 18 Foot Circle?
Crushed stone needed by depth
| Depth | Cubic yards | Tons of crushed stone | 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 |
Where round stone areas work
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 Pea Gravel 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. Crushed stone has angular faces that lock together under a compactor, which is why it holds a pad shape. Ask your supplier for their own tons-per-yard number, since stone source and moisture change it.
Measuring the area
Measure length and width in feet at a few points and use the largest figures, since real sites are rarely square. For odd shapes, split the area into rectangles and circles, work out each one and add them together. Depth is the number most people underestimate: drive a stake, run a level string and measure down to the dug-out surface in several spots.
Tools for the job
For anything bigger than a small path, rent a plate compactor; hand tampers cannot match it. A wheelbarrow, shovels, a hard rake and stakes with string are the rest of the kit. Wet the stone lightly before compacting so it binds.
Questions people ask
How many tons of crushed stone 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 crushed stone are in a cubic yard?
Roughly 1.4 tons for planning, but suppliers vary with stone size and moisture.
Should I put landscape fabric under the stone?
On soft or clay soil, a woven geotextile keeps stone from sinking into the dirt and makes the layer last longer.
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 River Rock for an 18 Foot Circle?
- How Much Decomposed Granite for an 18 Foot Circle?
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