Cubic decameters to barrels (oil) conversion calculator shown above calculates how many barrels (oil) are in 'X' cubic decameters (where 'X' is the number of cubic decameters to convert to barrels (oil)). In order to convert a value from cubic decameters to barrels (oil) (from dam³ to bbl) type the number of dam³ to be converted to bbl and then click on the 'convert' button.