Cubic kilometers to barrels (US fluid) conversion calculator above calculates how many barrels (US fluid) are in 'X' cubic kilometers (where 'X' is the number of cubic kilometers to convert to barrels (US fluid)). In order to convert a value from cubic kilometers to barrels (US fluid) (from km³ to fl bl) type the number of km³ to be converted to fl bl and then click on the 'convert' button.