Pea gravel is small, naturally rounded stone, usually between 1/8 and 3/8 inch across. It comes from river beds and glacial deposits, where tumbling water has already smoothed every edge, so the stones need no crushing and no shaping. That smooth, pebble-like texture is what makes the material comfortable to walk on barefoot, and it is why landscapers reach for it when appearance and feel matter more than load-bearing strength.
The colors are warmer and more varied than crushed stone: creams, tans, soft browns, and gray-blue mixes, with the exact blend depending on the local deposit. Because the stones are uniform in size, pea gravel drains quickly and does not pack into a hard crust. Water moves straight through it, which is useful in garden paths, around downspouts, and under outdoor furniture. The same looseness has a downside: the stones shift underfoot and spread outward over time, so most projects need an edging that holds them in place.
How to Calculate How Much Pea Gravel You Need
Pea gravel is lighter per cubic foot than angular crushed stone because round stones leave more air between them. At 100 lb/ft³, it converts at 1.35 tons per cubic yard. Using the standard gravel factor of 1.39 would overstate your order by about 3%.
Formula: length (ft) × width (ft) × (depth in inches ÷ 12) = cubic feet → ÷ 27 = cubic yards → × 1.35 = US tons.
Worked example: a 12 ft × 10 ft patio at 3 inches deep.
- Cubic feet: 12 × 10 × (3 ÷ 12) = 120 × 0.25 = 30 cu ft
- Cubic yards: 30 ÷ 27 = 1.11 cu yd
- Tons: 1.11 × 1.35 = 1.50 tons
Ordering 1.75 tons gives the patio a cushion for the slight dishing that happens as stone settles into the base.
Pea Gravel Coverage at Common Depths
Figures assume 100 lb/ft³ (1.35 tons per cubic yard) and loose, uncompacted material.
| Depth | Coverage per ton | Coverage per cubic yard |
|---|---|---|
| 1 inch | 240 sq ft | 324 sq ft |
| 2 inches | 120 sq ft | 162 sq ft |
| 3 inches | 80 sq ft | 108 sq ft |
| 4 inches | 60 sq ft | 81 sq ft |
A one-inch layer looks thin and shows the base or soil through gaps within weeks, so treat the 1 inch row as a reference point rather than a recommendation. For anything people walk on regularly, plan on at least 2 inches.
How Much Pea Gravel for Common Projects
Garden path — 30 ft × 3 ft at 2 inches deep
Volume: 30 × 3 × 0.167 = 15 cu ft → 0.56 cu yd → 0.56 × 1.35 = 0.75 tons. A three-quarter ton order covers the path with a little left over for topping up the low spots that form after the first heavy rain.
Dog run — 10 ft × 20 ft at 3 inches deep
Volume: 10 × 20 × 0.25 = 50 cu ft → 1.85 cu yd → 1.85 × 1.35 = 2.50 tons. Pea gravel drains well and is gentle on paws, but it needs regular raking and occasional rinsing in a run. Two and a half tons is the exact figure, so round up to 2.75 for a clean finish.
Play area — 20 ft × 15 ft at 6 inches deep
Volume: 20 × 15 × 0.5 = 150 cu ft → 5.56 cu yd → 5.56 × 1.35 = 7.50 tons. Playground surfacing depends on the fall height of your equipment, so follow the manufacturer’s guidance rather than a general rule. If the equipment calls for a deeper fill, enter that depth in the calculator.
Fire pit surround — 8 ft diameter circle at 3 inches deep
Area: π × 4² = 50.3 sq ft → 50.3 × 0.25 = 12.6 cu ft → 0.47 cu yd → 0.47 × 1.35 = 0.63 tons. Keep the stone beneath and immediately around the fire ring dry, because moisture trapped in smooth stones can cause them to crack when heated.
Buying and Delivery Tips
Pea gravel is sold by the ton or by the cubic yard at most stone yards, and by the bag at home centers. Bulk is almost always the better deal beyond about half a yard. Ask whether the price covers delivery, since hauling charges can add a third to the cost on small loads.
Confirm the stone size when you order. Some yards label 1/2 inch washed stone as pea gravel, and the larger size feels noticeably rougher underfoot. If the surface will be walked on barefoot, ask for the smaller 3/8 inch grade and look at a sample before the truck arrives.
Prepare the base before delivery. Excavate 4 to 6 inches for a patio or path, tamp the soil, lay a layer of non-woven landscape fabric, and add compacted crushed stone before the pea gravel goes on. The fabric keeps soil from working its way up into the stone, and the crushed base gives the loose layer a firm floor to sit on.
Install a rigid edge such as steel, aluminum, or pavers set in concrete. Without one, rain and foot traffic push the stones out over the surrounding lawn, and the layer thins from the sides inward. Plan to rake the surface every few months and top up with about a tenth of the original quantity each year to keep the depth where you want it.