How Much Crushed Stone for a 20 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 20-foot circle is about 314.2 square feet; at 4 inches that is 5.4 tons of crushed stone.
Volume and tonnage calculator →The math
- Area: 314.2 sq ft.
- Depth in feet: 4 ÷ 12 = 0.333 ft.
- Cubic yards: 314.2 × 0.333 ÷ 27 = 3.88 yd³.
- Tons: × about 1.4 tons per yard = 5.4 tons.
The crushed stone calculator does this for any size.
Related: How Much Gravel for a 20 Foot Circle?
Crushed stone needed by depth
| Depth | Cubic yards | Tons of crushed stone | Tons +10% |
|---|---|---|---|
| 2 in | 1.94 | 2.7 | 3.0 |
| 3 in | 2.91 | 4.1 | 4.5 |
| 4 in | 3.88 | 5.4 | 6.0 |
| 6 in | 5.82 | 8.1 | 9.0 |
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. For a fire pit area, keep combustibles well away and check local burn rules.
Related: How Much Pea Gravel for a 20 Foot Circle?
Getting it delivered
Small dump trucks commonly carry around 5 to 10 tons and tri-axles more, but loads vary by truck and state, so ask the yard what fits in one trip. Crushed stone has angular faces that lock together under a compactor, which is why it holds a pad shape. Round up by about 10 percent for compaction and uneven ground.
Planning the cost
Stone is usually priced per ton or per cubic yard, and delivery is often a separate charge based on distance. A full truckload can cost less per ton than a partial one, so it can pay to combine projects. Ask whether the quote includes tax, delivery and any small-load fee before you compare yards.
Tools for the job
A flat shovel, a steel rake, a wheelbarrow and a rented plate compactor cover most residential pads. A landscape rake or the back of a rake levels the top layer, and a long straightedge or a level string shows high and low spots before the final pass.
Questions people ask
How many tons of crushed stone for a 20 ft circle?
About 5.4 tons at 4 inches deep.
How many square feet is a 20 foot circle?
About 314.2 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 20 Foot Circle?
- How Much Decomposed Granite for a 20 Foot Circle?
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