Bags of Pea Gravel for a 8x16 Patio
How many bags of pea gravel for a 8x16 patio: at 3 inches deep you need about 32.0 cubic feet, which is 64 bags of the common 0.5 cubic foot size. If your store sells pea gravel in 50-pound bags instead, figure about 67 bags, since pea gravel weighs roughly 104 pounds per cubic foot.
Volume and tonnage calculator →Bag count by depth
| Depth | Cubic feet | 0.5 cu ft bags | 50 lb bags (approx.) |
|---|---|---|---|
| 1 in | 10.7 | 22 | 23 |
| 2 in | 21.3 | 43 | 45 |
| 3 in | 32.0 | 64 | 67 |
| 4 in | 42.7 | 86 | 89 |
How to figure it
- Area: 8 × 16 = 128 sq ft.
- Volume: 128 × (3 ÷ 12) = 32.0 cu ft.
- Bags: 32.0 ÷ 0.5 = 64 bags (round up).
Bags or bulk?
A cubic yard is 27 cubic feet, so 32.0 cubic feet is 1.19 yards, about 1.7 tons. Past about a yard, bulk is usually less work and often less money. Compare the bag price × 64 against a bulk quote for 1.8 tons delivered.
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.
Before you spread for a patio
- Dig and level. Remove sod and set the base slightly below the surrounding grade.
- Edge it. Steel, plastic or stone edging keeps material in place.
- Spread in layers. Rake to depth, then rake smooth; rounded stone will not compact.
- Buy a few extra. Grab 5 to 10 percent more bags for settling and touch-ups.
The volume and tonnage calculator handles other sizes and depths.
When to choose pea gravel
Good uses:
- 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 12x24 area at 4 inches takes about 5.0 tons.
- Weight used here: about 1.4 tons per cubic yard.
Where estimates go wrong
- Mixing up cubic yards and tons. Yards are volume, tons are weight; convert with the product’s weight per yard.
- Using inches as if they were feet. Depth has to be divided by 12 before you multiply; skipping that step inflates the order twelvefold.
- Ordering exactly the math. Uneven ground and spillage nearly always need a little more than the flat calculation.
- Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.
Questions people ask
How many bags of pea gravel for a 8x16 patio?
About 64 bags of 0.5 cubic feet at 3 inches deep.
How many 50 lb bags of pea gravel for 8x16?
About 67 bags at 3 inches.
How many 0.5 cubic foot bags are in a cubic yard?
54 bags.
How many cubic feet is a 8x16 patio at 3 inches?
About 32.0 cubic feet.
When does bulk make more sense?
Usually once the job passes about a cubic yard, or when you would need more than a few car trips.
Related guides
- How Much Does a Ton of Gravel Cover? Depth Chart
- Tons to Cubic Yards for Gravel: Conversion Chart
- How Much Does a Ton of Gravel Cover? Depth Chart
- Bags of Pea Gravel for a 8x12 Patio
- Bags of Pea Gravel for a 8x14 Patio
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