How Much Crushed Stone for a 15 Foot Circle?
Round areas such as fire pit patios, tree rings and seating circles use less stone than a square of the same width. A 15-foot circle is about 176.7 square feet; at 4 inches that is 3.1 tons of crushed stone.
Volume and tonnage calculator →The math
- Area: 176.7 sq ft.
- Depth in feet: 4 ÷ 12 = 0.333 ft.
- Cubic yards: 176.7 × 0.333 ÷ 27 = 2.18 yd³.
- Tons: × about 1.4 tons per yard = 3.1 tons.
The crushed stone calculator does this for any size.
Related: How Much Gravel for a 15 Foot Circle?
Crushed stone needed by depth
| Depth | Cubic yards | Tons of crushed stone | Tons +10% |
|---|---|---|---|
| 2 in | 1.09 | 1.5 | 1.7 |
| 3 in | 1.64 | 2.3 | 2.5 |
| 4 in | 2.18 | 3.1 | 3.4 |
| 6 in | 3.27 | 4.6 | 5.0 |
Using a circle of stone
Circles show up around fire pits, under swing sets, around trees and as seating areas. Steel or paver edging keeps the round shape crisp and holds loose stone in place. Rake the stone level after spreading and add a thin top-up after the first season.
Related: How Much Pea Gravel for a 15 Foot Circle?
Buying the stone
If you haul it yourself, a typical half-ton pickup should carry only about half a cubic yard of stone, well under what the bed looks like it can hold. Crushed stone has angular faces that lock together under a compactor, which is why it holds a pad shape. The scale ticket is the real weight; tons per yard here is a planning figure.
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.
Measuring the area
Use a long tape and measure each side twice. If the ground slopes, measure depth at the high and low ends and average them. Irregular outlines can be broken into simple rectangles, triangles and circles; add the pieces for the total square footage before converting to tons.
Questions people ask
How many tons of crushed stone for a 15 ft circle?
About 3.1 tons at 4 inches deep.
How many square feet is a 15 foot circle?
About 176.7 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.
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 River Rock for a 15 Foot Circle?
- How Much Decomposed Granite for a 15 Foot Circle?
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