# units of volume

## barrel

A barrel is a unit of volume used to measure liquids, particularly petroleum. For oil and petroleum products, a barrel equals 158.98 liters or 35 Imperial gallons (42 US gallons). For beer, a barrel equals 163.66 liters or 36 Imperial gallons (43.24 US gallons). For dry goods (such as grain), a barrel equals 0.1156 cubic meter or 3.180 bushels (3.28 US bushels).

## bushel

A bushel is a unit of dry measure equal in volume to 8 imperial gallons or 64 pints (36.5 liters), and to four pecks. It is traditionally used to measure grain and fruit. The name comes from a word in Old French for a much smaller measure, "the amount one can hold in the hand."

## gallon

Gallon (gal) is the name of various units of volume. The
US gallon is 0.003785 m^{2}. The UK gallon, the volume of 10 lbf
of pure water under specified conditions, is 0.004546 m^{3} or 1.201
US gallons.

## gill

A gill (gi) is any of various units of volume, usually equalling one-fourth of a pint. The US gill is 0.1183 liters; the Imperial gill is 0.1421 liters.

## liter

The liter (l) is a metric unit of volume originally defined
as that of 1 kilogram of water at the temperature
of maximum density (1.000028 dm^{3}), but redefined in 1964 as exactly
equal to 1 cubic decimeter (= 1 dm^{3}). A liter is equivalent to
0.22 imperial gallons or 0.2642 US gallons. The liter is not recommended
for use alongside SI units.

## pint

The pint is a unit of liquid capacity. One pint is equal to 1/8 of a gallon, 1/2 of a quart, 1.201 US pint, or 0.568 liter.