Bags of Pea Gravel for a 16x16 Patio

How many bags of pea gravel for a 16x16 patio: at 3 inches deep you need about 64.0 cubic feet, which is 128 bags of the common 0.5 cubic foot size. If your store sells pea gravel in 50-pound bags instead, figure about 133 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	21.3	43	45
2 in	42.7	86	89
3 in	64.0	128	133
4 in	85.3	171	177

How to figure it

Area: 16 × 16 = 256 sq ft.
Volume: 256 × (3 ÷ 12) = 64.0 cu ft.
Bags: 64.0 ÷ 0.5 = 128 bags (round up).

Bags or bulk?

A cubic yard is 27 cubic feet, so 64.0 cubic feet is 2.37 yards, about 3.3 tons. Past about a yard, bulk is usually less work and often less money. Compare the bag price × 128 against a bulk quote for 3.7 tons delivered.

About pea gravel

Pea gravel is small, rounded stone, usually around 3/8 inch. It is comfortable to walk on and drains well, but it shifts under car tires and needs a solid edge to stay put.

Install tips 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.

Good and poor uses for pea gravel

Works well for:

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 20x25 area at 3 inches takes about 6.5 tons.
Weight used here: about 1.4 tons per cubic yard.

Where estimates go wrong

Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.
Ordering exactly the math. Uneven ground and spillage nearly always need a little more than the flat calculation.
Ignoring the base. A thin surface layer over soft soil fails early no matter how much material is on top.
Mixing up cubic yards and tons. Yards are volume, tons are weight; convert with the product’s weight per yard.

Questions people ask

How many bags of pea gravel for a 16x16 patio?

About 128 bags of 0.5 cubic feet at 3 inches deep.

How many 50 lb bags of pea gravel for 16x16?

About 133 bags at 3 inches.

How many 0.5 cubic foot bags are in a cubic yard?

54 bags.

How many cubic feet is a 16x16 patio at 3 inches?

About 64.0 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.

As an Amazon Associate, AsphaltTons.com earns from qualifying purchases. Product links below are sponsored.