How much pea gravel do I need?
Area x depth, at 1.3 tons per cubic yard. Pea gravel is smooth, rounded stone — popular for garden beds, paths, playgrounds and drainage. A 10 ft x 10 ft bed at 2 inches deep needs about 0.62 cubic yards (roughly 0.8 tons, or 33 x 0.5 cu ft bags).
Use 2 inches for beds and paths; 3 inches where you want serious weed suppression. Pea gravel compacts less than crushed stone, so it stays loose underfoot — good for paths, less good as a driveway surface.
For driveways and heavy use, use the gravel calculator with crushed stone instead.