Pecks (UK) to barrels (oil) converter on this page calculates how many barrels (oil) are in 'X' pecks (UK) (where 'X' is the number of pecks (UK) to convert to barrels (oil)). In order to convert a value from pecks (UK) to barrels (oil) (from pk to bbl) simply type the number of pk to be converted to bbl and then click on the 'convert' button.