How Much Gravel Under a 12x24 Deck?
A 12 by 24 foot deck covers 288 square feet. At 3 inches of gravel, plan on 2.67 cubic yards, or about 3.7 tons, which answers how much gravel under a 12x24 deck.
Volume and tonnage calculator →The math
- Area: 288.0 sq ft.
- Depth in feet: 3 ÷ 12 = 0.250 ft.
- Cubic yards: 288.0 × 0.250 ÷ 27 = 2.67 yd³.
- Tons: × about 1.4 tons per yard = 3.7 tons.
The gravel calculator does this for any size.
Related: How Much Crushed Stone Under a 12x24 Deck?
Gravel needed by depth
| Depth | Cubic yards | Tons of gravel | Tons +10% |
|---|---|---|---|
| 2 in | 1.78 | 2.5 | 2.7 |
| 3 in | 2.67 | 3.7 | 4.1 |
| 4 in | 3.56 | 5.0 | 5.5 |
| 6 in | 5.33 | 7.5 | 8.2 |
Building the deck base
Under a deck, stone is a weed and moisture barrier rather than a structural layer. Slope the soil away from the house, lay fabric and spread 2 to 3 inches of washed stone that drains quickly.
Related: How Much Pea Gravel Under a 12x24 Deck?
Prep
Clear vegetation, rake the soil level and compact it. Lay fabric overlapped at the seams and set edging before spreading the stone.
Buying the stone
Most quarries and landscape yards deliver by the ton; ask whether there is a minimum and a delivery fee, and where the driver can dump without damaging your lawn. 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.
Measuring the area
Use a long tape and measure each side twice. If the ground slopes, measure depth at the high and low ends and average them. Irregular outlines can be broken into simple rectangles, triangles and circles; add the pieces for the total square footage before converting to tons.
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 gravel under a 12x24 deck?
About 3.7 tons at 3 inches deep.
How many yards of gravel under a 12x24 deck?
About 2.67 cubic yards.
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
- 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 #57 Stone Under a 20x20 Deck?
- How Much Pea Gravel Under a 20x20 Deck?
As an Amazon Associate, AsphaltTons.com earns from qualifying purchases. Product links below are sponsored.