Convert barrel (petroleum) to firkin (U.K. beer)
Selected category: volume.
Definition and details for barrel (petroleum):
Petroleum barrel (bbl or bo from "barrel of oil") is defined to be 42 U.S. gallons or about 158.987 liters. This unit is equal to the traditional tierce, an old English wine barrel.
Definition and details for firkin (U.K. beer):
Firkin is a traditional unit of liquid volume equal to 1/4 barrel. U.K. beer firkin (after 1824) is equal to 9 imperial gallons or about 40.91 liters.