In terms of English brewery cast units, how many gallons are in a beer firkin?
Firkin (unit) a barrel and its value depends on the current size of a barrel, but at present: 1 firkin = 0.25 barrel = 9 imperial gallons = 10.8 U.S. gallons = 41 litres Firkin (unit) A firkin is a unit of volume or mass used in several situations. Its etymology is likely to be from the Middle English "ferdekyn", probably from the Middle Dutch diminutive of vierde ‘fourth’ (a firkin originally contained a quarter of a barrel). A firkin is an American unit of dry measure. 1 firkin = 9 US gallons = 34 litres. A firkin was a British unit
English brewery cask units English brewery cask units Capacities of brewery casks were formerly measured and standardised according to a specific system of English units. The system was originally based on the ale gallon of . In United Kingdom and its colonies, with the adoption of the imperial system in 1824, the units were redefined in terms of the slightly smaller imperial gallon (). The older units continued in use in the United States. Historically the terms "beer" and "ale" referred to distinct brews. From the mid 15th century until 1803 in Britain "ale" casks and "beer" casks differed in the number of gallons