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