Pebbles

A cubic yard measures 3 ft. x 3 ft. x 3 ft. A cubic yard of mulch will cover a 10 ft. x 10 ft. area, 3 in. deep. (3 in. is the recommended depth for spreading mulch.) So a good rule of thumb is to calculate the square footage of the area to be covered with mulch and divide by 100. For example, imagine you have a front porch with a flower bed on each side. Each side measures 15 ft. x 10 ft. (150 sq. ft.). The total area to be covered is 150 + 150 = 300 sq. ft. To calculate the number of yards of mulch required, divide that by 100. So you need 3 yards of mulch.