The weight of mulch is dependent on its moisture content, with dry mulch sometimes weighing as little as 400 pounds and wet mulch weighing up to 1,000 pounds per cubic yard. In most instances, the supplier is the best source of a weight estimate of the materials.
One cubic yard, or 27 cubic inches, of mulch or other material fills a cube with 3 feet on each edge. When spread, each cubic yard of mulch covers a 100-square foot area with a thickness of 3 inches. Depending on the weight of the mulch and weight rating of the truck, a full-sized pickup truck is able to haul 2 to 3 yards of mulch per trip.