Barrels (UK) to gills (US) converter above calculates how many gills (US) are in 'X' barrels (UK) (where 'X' is the number of barrels (UK) to convert to gills (US)). In order to convert a value from barrels (UK) to gills (US) type the number of bl to be converted to gills (US) and then click on the 'convert' button.