How Much Crushed Stone for a 12x40 RV Pad?
How much crushed stone for a 12x40 RV pad: about 12.4 tons at 6 inches deep. The pad covers 480 square feet, enough for most fifth wheels and Class A coaches.
Volume and tonnage calculator →The math
- Area: 480.0 sq ft.
- Depth in feet: 6 ÷ 12 = 0.500 ft.
- Cubic yards: 480.0 × 0.500 ÷ 27 = 8.89 yd³.
- Tons: × about 1.4 tons per yard = 12.4 tons.
The crushed stone calculator does this for any size.
Related: How Much Crusher Run for a 12x40 RV Pad?
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 |
| 12 in | 17.78 | 24.9 | 27.4 |
Depth for an RV pad
RVs put a lot of weight on a few tires and leveling jacks. A 6-inch compacted base suits most firm soils; soft or clay ground often needs 8 inches or more and a woven fabric underneath. Put jack pads or small concrete pads where the jacks land.
Related: How Many Tons of Asphalt for a 12 by 40 RV Pad?
Size and access
Measure your rig with slides out and add a few feet. At 12 feet wide, check that slide-outs and the awning clear. Leave a turning area at the entry.
Drainage
Build the pad a little higher than the yard and slope it gently. Standing water under an RV softens the base and invites rust.
Buying the stone
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.
Questions people ask
How many tons of crushed stone for a 12x40 RV pad?
About 12.4 tons at 6 inches deep.
How thick should an RV gravel pad be?
At least 6 inches compacted; 8 to 12 on soft soil.
Do I need fabric under an RV pad?
On soft or clay soil, a woven geotextile helps keep the stone from sinking.
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 12x35 RV Pad?
- How Much Gravel for a 12x40 RV Pad?
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