Construction Aggregate Materials Conversion Chart (square feet to cubic yards) One cubic yard will cover the following amount of square feet at the given depth. So, to fill a material 2" deep in a given square foot area, you would divide the square footage by 162. To fill it 6" deep, divide by 54, and so on. 1/4" Deep.1296 sq. ft. 1" Deep.324 sq. ft. 2" Deep.162 sq. ft. 3" Deep.108 sq. ft. 4" Deep.81 sq. ft. 6" Deep.54 sq. ft.
Drain rock product prices vary greatly by region. Drain rock is rounded to partially rounded river rock, drain rock is not angular crushed rock. Angular crushed rock will compact tightly and limit drainage.