How Much Gravel for a 12x40 RV Pad?
An RV parks for weeks at a time, so the pad needs real depth. A 12 by 40 foot pad at 6 inches is 8.89 cubic yards, about 12.4 tons of gravel, for how much gravel for a 12x40 RV pad.
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 gravel calculator does this for any size.
Related: How Much Crushed Stone for a 12x40 RV Pad?
Gravel needed by depth
| Depth | Cubic yards | Tons of gravel | 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 |
How thick to build it
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 Much Crusher Run for a 12x40 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.
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. Gravel is a broad label, so confirm whether the yard means crushed or rounded stone and whether it carries fines. Round up by about 10 percent for compaction and uneven ground.
Questions people ask
How many tons of gravel 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 gravel 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 Crushed Stone for a 12x35 RV Pad?
- How Much Crusher Run for a 12x35 RV Pad?
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