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