High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! A barrel is one of several units of volume, with dry barrels, fluid barrels (UK beer barrel, U.S. beer barrel), oil barrel, etc. The volume of some barrel units is double others, with various volumes in the range of about 100–200 litres (22–44 imp gal; 26–53 USgal).Fluid barrels vary depending on what is being measured and where. For barrels of oil, see the next section.In the U.K. a beer barrel is 36 imperial gallons (43 US gal; 164 L). In the U.S. most fluid barrels (apart from oil) are 31.5 US gallons (26 imp gal; 119 L) (half a hogshead), but a beer barrel is 31 US gallons (26 imp gal; 117 L).

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