crude barrel s 3,379,200 acre feet 4,168,181,825,440.579584 litre s (exactly) 4,168,181,825.440579584 cubic metre s 4.168181825440579584 cubic kilometre s Cubic yard A cubic yard is an Imperial / U.S. customary (non- SI non- metric ) unit of volume , used in the United States , Canada, and the UK. It is defined