How Much Crushed Stone for a 20x24 Carport?
How much crushed stone for a 20x24 carport: about 8.3 tons at 4 inches deep and 12.4 tons at 6 inches, over 480 square feet.
Volume and tonnage calculator →The math
- Area: 480.0 sq ft.
- Depth in feet: 4 ÷ 12 = 0.333 ft.
- Cubic yards: 480.0 × 0.333 ÷ 27 = 5.93 yd³.
- Tons: × about 1.4 tons per yard = 8.3 tons.
The crushed stone calculator does this for any size.
Related: How Much Crusher Run for a 20x24 Carport?
Crushed stone needed by depth
| Depth | Cubic yards | Tons of crushed stone | Tons +10% |
|---|---|---|---|
| 4 in | 5.93 | 8.3 | 9.1 |
| 6 in | 8.89 | 12.4 | 13.7 |
| 8 in | 11.85 | 16.6 | 18.3 |
Building the carport base
Metal carport kits anchor to concrete, asphalt or ground anchors in soil or gravel. Check your kit’s anchor type before building the pad, and extend the stone a foot past the frame so posts sit on compacted base.
Related: How Many Tons of Asphalt for a Carport Pad?
How deep
Four inches works on firm ground for cars. Six inches is safer for trucks, heavy SUVs or soft soil.
Ordering and delivery
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. Ask your supplier for their own tons-per-yard number, since stone source and moisture change it.
Common mistakes
The most frequent problem is ordering for the finished depth without allowing for compaction, which can shrink a loose layer by 10 to 20 percent. Another is skipping fabric on soft soil and watching the stone vanish into the mud over the first wet season. Spreading everything in one thick layer instead of compacted lifts also leaves a soft, rutted surface.
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 a 20x24 carport?
About 8.3 tons at 4 inches or 12.4 at 6 inches.
Can a carport sit on gravel?
Many metal carports anchor into compacted gravel with ground anchors; check your kit.
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
- 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 Crusher Run for a 20x20 Carport?
- How Much Gravel for a 20x24 Carport?
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