How Much Decomposed Granite for a 30 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 30-foot circle is about 706.9 square feet; at 3 inches that is 8.8 tons of decomposed granite.
Volume and tonnage calculator →The math
- Area: 706.9 sq ft.
- Depth in feet: 3 ÷ 12 = 0.250 ft.
- Cubic yards: 706.9 × 0.250 ÷ 27 = 6.54 yd³.
- Tons: × about 1.35 tons per yard = 8.8 tons.
The gravel calculator does this for any size.
Related: How Much Gravel for a 30 Foot Circle?
Decomposed granite needed by depth
| Depth | Cubic yards | Tons of decomposed granite | Tons +10% |
|---|---|---|---|
| 2 in | 4.36 | 5.9 | 6.5 |
| 3 in | 6.54 | 8.8 | 9.7 |
| 4 in | 8.73 | 11.8 | 13.0 |
| 6 in | 13.09 | 17.7 | 19.4 |
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. Do not pile stone against tree trunks; leave a gap at the base.
Related: How Much Decomposed Granite for a 6 Foot Circle?
Ordering and delivery
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. Decomposed granite packs into a firm, natural path when wetted and compacted in thin lifts. The scale ticket is the real weight; tons per yard here is a planning figure.
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.
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.
Questions people ask
How many tons of decomposed granite for a 30 ft circle?
About 8.8 tons at 3 inches deep.
How many square feet is a 30 foot circle?
About 706.9 square feet.
How many tons of decomposed granite are in a cubic yard?
Roughly 1.35 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
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- How Much Does a Ton of Gravel Cover? Depth Chart
- Tons to Cubic Yards for Gravel: Conversion Chart
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- Geotextile Fabric for Driveways: Woven vs Nonwoven and How Much You Need
- Compacting a Driveway Gravel Base in Lifts
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