AGGREGATE SPEC: Fire Pit Area, Rustic Patio, English Garden Pathway

Pea Gravel Patio & Walkway Calculator

A 20×15 pea gravel patio covers 300 square feet. At 2.5 inches depth of smooth rounded 3/8" river pebbles (1.35 tons/yd³), you need approximately 2.65 cubic yards or 3.6 tons. If purchasing in 50 lb bags from a home improvement store, this equals roughly 143 bags.

AREA MEASUREMENTS300 SQ FT
Compaction settling factor:+5%
Standard waste tolerance:+10%
Aggregates Profile & Compaction
20' × 15' (2.5" Depth)
Aggregate profile for Pea Gravel (3/8" Smooth) 20' x 15'5% COMPACTION SETTLING FACTOR2.5" DEPTHPEA GRAVEL (3/8" SMOOTH)DENSITY: 1.35 TONS/YD³HEAVY-DUTY DRIVEWAY FABRIC
Compacted Volume:2.66 cu yds
Total Mass Needed:3.6 Tons
Delivery Size:Small Hauler / Pickup
Yield Summary (20' × 15')
RETAIL BAG EQUIVALENT
144 Bags
50 lb bags from home improvement center
Total Weight:7,200 lbs
BULK QUARRY DUMP TRUCK
3.6 Tons
1 Tandem dump truckload(s)
Compacted Volume:2.66 cu yds
Est. Quarry Cost:$162

Frequently Asked Questions: Pea Gravel Patio & Walkway Calculator

How deep should pea gravel be for a patio?

Pea gravel should be installed at a depth of 2.5 to 3 inches over a compacted 3-inch crusher run base. Any deeper and walking feels like trudging through loose beach sand.

How many bags of pea gravel for a 20x15 patio?

You will need approximately 143 bags of 50 lb pea gravel (around 3.6 tons) if purchasing bagged retail products.