How Much Does 18 Tons of Pea Gravel Cover?
How much does 18 tons of pea gravel cover depends on how deep you spread it. At about 1.4 tons per cubic yard, 18 tons is roughly 12.9 cubic yards. Spread 3 inches deep, that covers about 1,389 square feet. Go thinner and it covers more; go deeper and it covers less.
Volume and tonnage calculator →How the coverage is figured
- Tons to cubic yards: 18 ÷ 1.4 = 12.9 yd³.
- Cubic yards to cubic feet: × 27 = 347 cu ft.
- Divide by depth in feet: at 3 inches (0.250 ft), 347 ÷ 0.250 = 1,389 sq ft.
Coverage of 18 tons at different depths
| Depth | Square feet covered | Square yards |
|---|---|---|
| 2 in | 2,083 | 231 |
| 3 in | 1,389 | 154 |
| 4 in | 1,041 | 116 |
About pea gravel
Because pea gravel is round, it never fully locks. Keep depths modest on walkways and patios so it does not feel like walking on a beach, and use edging. Weight runs about 1.3 to 1.5 tons per cubic yard, so treat the table as a planning range rather than an exact figure.
What 18 tons looks like on site
18 tons will usually take two or more truck loads, though legal limits vary by truck and state. Spread from the pile with a loader, skid steer or wheelbarrow, then rake to depth before compacting if the material calls for it.
- Check depth as you go. Stakes marked at the target depth help keep the spread even.
- Expect some loss. Compaction and uneven ground use more than the flat-math figure. Keep about 10 percent in reserve.
- Ask about moisture. Wet material weighs more, so a ton of it covers less.
To run your own numbers, use the volume and tonnage calculator.
Where pea gravel fits
Best suited to:
- Patios, walkways and dog runs
- Play areas with proper depth and edging
- Drainage around foundations when sized properly
Poor fit for:
- Driveways and steep paths, where it rolls and ruts
- Under pavers as a base
- Areas without edging
Quick reference numbers
- Per inch over 100 sq ft: about 0.43 tons of pea gravel (0.31 cubic yards).
- Per inch over 1,000 sq ft: about 4.3 tons.
- Another size for comparison: a 8x16 area at 4 inches takes about 2.2 tons.
- Weight used here: about 1.4 tons per cubic yard.
Mistakes that throw off the order
- Ignoring the base. A thin surface layer over soft soil fails early no matter how much material is on top.
- Measuring only the main rectangle. Aprons, turnouts and curved edges add real square footage.
- Assuming every supplier uses the same weight. Two yards selling the same product name can quote different tons per yard.
- Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.
Questions people ask
How many cubic yards is 18 tons of pea gravel?
About 12.9 cubic yards at 1.4 tons per yard.
How many square feet does 18 tons of pea gravel cover at 3 inches?
About 1,389 square feet.
How many square feet does 18 tons cover at 2 inches?
About 2,083 square feet.
How much does a yard of pea gravel weigh?
About 1.3 to 1.5 tons.
Will 18 tons fit in one truck?
It depends on the truck. Single-axle dump trucks often carry under 10 tons and tandems around 13 to 16; your supplier will know their limits.
Related guides
- How Much Does a Ton of Gravel Cover? Depth Chart
- Tons to Cubic Yards for Gravel: Conversion Chart
- How Many Tons of Gravel in a Dump Truck? Loads and Coverage
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