How Much Crusher Run for a 20x20 Carport?
A 20 by 20 foot carport (double) covers 400 square feet. How much crusher run for a 20x20 carport: plan on 11.5 tons for a 6-inch pad that will carry vehicles.
Volume and tonnage calculator →The math
- Area: 400.0 sq ft.
- Depth in feet: 4 ÷ 12 = 0.333 ft.
- Cubic yards: 400.0 × 0.333 ÷ 27 = 4.94 yd³.
- Tons: × about 1.55 tons per yard = 7.7 tons.
The crushed stone calculator does this for any size.
Related: How Much Crusher Run for a 20x20 Parking Pad?
Crusher run needed by depth
| Depth | Cubic yards | Tons of crusher run | Tons +10% |
|---|---|---|---|
| 4 in | 4.94 | 7.7 | 8.4 |
| 6 in | 7.41 | 11.5 | 12.6 |
| 8 in | 9.88 | 15.3 | 16.8 |
Carport pad tips
Most steel carports can anchor into a compacted gravel pad with auger or rebar anchors. Make the pad slightly larger than the frame and keep it level so the frame goes up square.
Related: How Much Crusher Run for a 12x20 Carport?
Depth for vehicles
Use 6 inches of compacted stone if you park pickups or trailers under it; 4 inches is the minimum for cars on firm soil.
Getting it delivered
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. Crusher run mixes stone and stone dust, so it packs nearly solid when compacted in layers. The scale ticket is the real weight; tons per yard here is a planning figure.
Measuring the area
Measure length and width in feet at a few points and use the largest figures, since real sites are rarely square. For odd shapes, split the area into rectangles and circles, work out each one and add them together. Depth is the number most people underestimate: drive a stake, run a level string and measure down to the dug-out surface in several spots.
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.
Questions people ask
How many tons of crusher run for a 20x20 carport?
About 7.7 tons at 4 inches or 11.5 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 crusher run are in a cubic yard?
Roughly 1.55 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 Gravel for a 20x20 Carport?
- How Much Crushed Stone for a 20x20 Carport?
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