How Much Pea Gravel Under a 10x12 Deck?
A 10 by 12 foot deck covers 120 square feet. At 3 inches of pea gravel, plan on 1.11 cubic yards, or about 1.6 tons, which answers how much pea gravel under a 10x12 deck.
Volume and tonnage calculator →The math
- Area: 120.0 sq ft.
- Depth in feet: 3 ÷ 12 = 0.250 ft.
- Cubic yards: 120.0 × 0.250 ÷ 27 = 1.11 yd³.
- Tons: × about 1.4 tons per yard = 1.6 tons.
The gravel calculator does this for any size.
Related: How Much Gravel Under a 10x12 Deck?
Pea gravel needed by depth
| Depth | Cubic yards | Tons of pea gravel | Tons +10% |
|---|---|---|---|
| 2 in | 0.74 | 1.0 | 1.1 |
| 3 in | 1.11 | 1.6 | 1.7 |
| 4 in | 1.48 | 2.1 | 2.3 |
| 6 in | 2.22 | 3.1 | 3.4 |
Stone for a deck
Gravel under a deck blocks weeds, keeps the ground from turning to mud and lets water drain. Lay landscape fabric first, then about 2 to 3 inches of stone; there is no need to compact it the way you would a driveway base.
Related: How Much Pea Gravel Under a 12x20 Deck?
Before the stone goes in
Remove sod and roots, level the area and slope it slightly for drainage. Install edging so the stone stays inside the footprint.
Ordering and delivery
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. Pea gravel is small and rounded, comfortable underfoot, and needs edging because it rolls. Round up by about 10 percent for compaction and uneven ground.
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
Stone is usually priced per ton or per cubic yard, and delivery is often a separate charge based on distance. A full truckload can cost less per ton than a partial one, so it can pay to combine projects. Ask whether the quote includes tax, delivery and any small-load fee before you compare yards.
Questions people ask
How many tons of pea gravel under a 10x12 deck?
About 1.6 tons at 3 inches deep.
How many yards of pea gravel under a 10x12 deck?
About 1.11 cubic yards.
How many tons of pea gravel are in a cubic yard?
Roughly 1.4 tons for planning, but suppliers vary with stone size and moisture.
Do I need to compact it?
Yes for anything that carries weight. Compact in lifts of a few inches with a plate compactor.
Related guides
- Gravel Under a Deck: Weeds, Drainage, and Depth
- 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 Under a 10x12 Deck?
- How Much #57 Stone Under a 10x12 Deck?
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