Quarts
There is more than one kind of quart:
One US liquid quart is 946ml: US liquid quart
One UK quart is 1.14L: UK quart
US Liquid Barrels
A US liquid barrel is a volume unit used in the United States to measure the volume of liquids. One US liquid barrel is equivalent to 31.5 US gallons or about 119.24 liters.
To convert this unit please visit: US liquid barrel conversions.
Note that there are many types of barrel so be sure to choose the correct one for your needs.