UK Barrels
A UK barrel is 36 imperial gallons (not to be confused with American gallons), about 163.659 liters or 0.163659 cubic meters. It is based on the traditional wine barrel used in the United Kingdom.
Kiloliters
Kiloliters are volume units in the metric system equal to 1,000 liters. Kiloliters are commonly used to measure large volumes of liquids, such as water in swimming pools or tanks.