Bags of Pea Gravel for a 3x30 Walkway

How many bags of pea gravel for a 3x30 walkway: at 3 inches deep you need about 22.5 cubic feet, which is 45 bags of the common 0.5 cubic foot size. If your store sells pea gravel in 50-pound bags instead, figure about 47 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	7.5	15	16
2 in	15.0	30	32
3 in	22.5	45	47
4 in	30.0	60	63

How to figure it

Area: 3 × 30 = 90 sq ft.
Volume: 90 × (3 ÷ 12) = 22.5 cu ft.
Bags: 22.5 ÷ 0.5 = 45 bags (round up).

Bags or bulk?

A cubic yard is 27 cubic feet, so 22.5 cubic feet is 0.83 yards, about 1.2 tons. This is a small enough job that bags are reasonable, especially if a bulk delivery fee applies. Compare the bag price × 45 against a bulk quote for 1.3 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.

Install tips for a walkway

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

Best suited to:

Patios, walkways and dog runs
Play areas with proper depth and edging
Drainage around foundations when sized properly

Less suited to:

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 3 inches takes about 3.7 tons.
Weight used here: about 1.4 tons per cubic yard.

Mistakes that throw off the order

Assuming every supplier uses the same weight. Two yards selling the same product name can quote different tons per yard.
Mixing up cubic yards and tons. Yards are volume, tons are weight; convert with the product’s weight per yard.
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.

Questions people ask

How many bags of pea gravel for a 3x30 walkway?

About 45 bags of 0.5 cubic feet at 3 inches deep.

How many 50 lb bags of pea gravel for 3x30?

About 47 bags at 3 inches.

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

54 bags.

How many cubic feet is a 3x30 walkway at 3 inches?

About 22.5 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.

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