Landscape & Aggregates

Pea Gravel Calculator

This pea gravel calculator estimates yards, tons and bags for paths and patios; our paver patio installation guide covers bases and edging. Pea gravel — small, rounded stone around ¼–⅜ in — is popular for paths, patios, play areas and drainage. Because it rolls underfoot, it is usually laid 2–3 in deep over a compacted base with edging. This calculator returns cubic yards, tons and the number of 0.5 cu ft bags for small jobs.

Results from this pea gravel calculator are planning estimates; confirm quantities and prices with your supplier or contractor before you order.

Your results will appear here

Enter your measurements and press Calculate. Defaults show a typical example.

How to use the pea gravel calculator

Enter the area dimensions.
Use 2–3 in for walkways and patios; deeper for play areas per the surfacing guidance you follow.
Adjust the density to your supplier's figure.

Formula

Cubic yards = area (sq ft) × depth (in) ÷ 12 ÷ 27 × (1 + waste). Tons = cubic yards × density. Bags = cubic feet ÷ 0.5 ft³.

Worked example

A 4 × 30 ft path at 3 in: 120 × 0.25 = 30 ft³; with 5% extra 31.5 ft³ = 1.17 yd³ (≈1.6 tons) or 63 half-cubic-foot bags.

Tips for using the pea gravel calculator

Install edging first; pea gravel rolls and spreads without a firm border.
Keep depth to 2–3 in on paths so it stays comfortable to walk on.
Use a compacted crushed-stone base under pea gravel in high-traffic areas.
Rake pea gravel level after delivery and top it up every year or two, because stones migrate into lawns and planting beds over time. A stabilizer grid under the stone keeps paths firm and stops ruts.