Bags of Pea Gravel for a 4x15 Walkway
How many bags of pea gravel for a 4x15 walkway: at 3 inches deep you need about 15.0 cubic feet, which is 30 bags of the common 0.5 cubic foot size. If your store sells pea gravel in 50-pound bags instead, figure about 32 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 | 5.0 | 10 | 11 |
| 2 in | 10.0 | 20 | 21 |
| 3 in | 15.0 | 30 | 32 |
| 4 in | 20.0 | 40 | 42 |
How to figure it
- Area: 4 × 15 = 60 sq ft.
- Volume: 60 × (3 ÷ 12) = 15.0 cu ft.
- Bags: 15.0 ÷ 0.5 = 30 bags (round up).
Bags or bulk?
A cubic yard is 27 cubic feet, so 15.0 cubic feet is 0.56 yards, about 0.8 tons. Under a yard, bags save a delivery fee and are easy to haul in a car or pickup. Compare the bag price × 30 against a bulk quote for 0.9 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.
Before you spread 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.
Where pea gravel fits
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 14x28 area at 2 inches takes about 3.4 tons.
- Weight used here: about 1.4 tons per cubic yard.
Common estimating mistakes
- Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.
- 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.
- Forgetting that compaction shrinks loose material. A loose 4-inch spread of a dense-graded stone may finish closer to 3 inches after rolling.
Questions people ask
How many bags of pea gravel for a 4x15 walkway?
About 30 bags of 0.5 cubic feet at 3 inches deep.
How many 50 lb bags of pea gravel for 4x15?
About 32 bags at 3 inches.
How many 0.5 cubic foot bags are in a cubic yard?
54 bags.
How many cubic feet is a 4x15 walkway at 3 inches?
About 15.0 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 3x100 Walkway
- Bags of Pea Gravel for a 4x10 Walkway
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