How Much Does 9 Tons of Decomposed Granite Cover?
How much does 9 tons of decomposed granite cover depends on how deep you spread it. At about 1.35 tons per cubic yard, 9 tons is roughly 6.7 cubic yards. Spread 3 inches deep, that covers about 720 square feet. Go thinner and it covers more; go deeper and it covers less.
Volume and tonnage calculator →How the coverage is figured
- Tons to cubic yards: 9 ÷ 1.35 = 6.7 yd³.
- Cubic yards to cubic feet: × 27 = 180 cu ft.
- Divide by depth in feet: at 3 inches (0.250 ft), 180 ÷ 0.250 = 720 sq ft.
Coverage of 9 tons at different depths
| Depth | Square feet covered | Square yards |
|---|---|---|
| 2 in | 1,080 | 120 |
| 3 in | 720 | 80 |
| 4 in | 540 | 60 |
About decomposed granite
Decomposed granite (DG) is weathered granite broken into small particles and fines. It packs into a firm, natural-looking path surface, and stabilized versions include a binder. Weight runs about 1.25 to 1.45 tons per cubic yard, so treat the table as a planning range rather than an exact figure.
What 9 tons looks like on site
9 tons is about one tandem-axle truck load, though legal limits vary by truck and state. Spread from the pile with a loader, skid steer or wheelbarrow, then rake to depth before compacting if the material calls for it.
- Check depth as you go. Stakes marked at the target depth help keep the spread even.
- Expect some loss. Compaction and uneven ground use more than the flat-math figure. Keep about 10 percent in reserve.
- Ask about moisture. Wet material weighs more, so a ton of it covers less.
To run your own numbers, use the volume and tonnage calculator.
Good and poor uses for decomposed granite
Best suited to:
- Garden paths and patios with a natural look
- Around trees and in xeriscape designs
- Stabilized DG for accessible paths
Think twice for:
- Steep grades without a stabilizer
- Areas right outside doors, since fines track in
- Driveways with heavy turning traffic
Quick reference numbers
- Per inch over 100 sq ft: about 0.42 tons of decomposed granite (0.31 cubic yards).
- Per inch over 1,000 sq ft: about 4.2 tons.
- Another size for comparison: a 8x16 area at 3 inches takes about 1.6 tons.
- Weight used here: about 1.35 tons per cubic yard.
Common estimating mistakes
- Forgetting that compaction shrinks loose material. A loose 4-inch spread of a dense-graded stone may finish closer to 3 inches after rolling.
- Ignoring the base. A thin surface layer over soft soil fails early no matter how much material is on top.
- Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.
- Measuring only the main rectangle. Aprons, turnouts and curved edges add real square footage.
Questions people ask
How many cubic yards is 9 tons of decomposed granite?
About 6.7 cubic yards at 1.35 tons per yard.
How many square feet does 9 tons of decomposed granite cover at 3 inches?
About 720 square feet.
How many square feet does 9 tons cover at 2 inches?
About 1,080 square feet.
How much does a yard of decomposed granite weigh?
About 1.25 to 1.45 tons.
Will 9 tons fit in one truck?
It depends on the truck. Single-axle dump trucks often carry under 10 tons and tandems around 13 to 16; your supplier will know their limits.
Related guides
- Crushed Stone vs Gravel: Differences and Best Uses
- Tons to Cubic Yards for Gravel: Conversion Chart
- How Many Tons of Gravel in a Dump Truck? Loads and Coverage
- How Much Does 7 Tons of Decomposed Granite Cover?
- How Much Does 8 Tons of Decomposed Granite Cover?
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