Cubic Millimeters
Cubic millimeters are volume units in the metric system. A cubic millimeter is a unit of volume equal to the volume of a cube with sides measuring one millimeter each. It is a very small unit of volume commonly used to measure tiny amounts of liquids or solids. For example, a single drop of water may have a volume of approximately 50 cubic millimeters.
US Dry Barrels
A US dry barrel is a unit of volume measurement normally used in the United States for dry goods such as grains, fruits, and vegetables. One US dry barrel is about 115.628 liters or 0.1156 cubic meters.
To convert this unit please visit: US dry barrel conversions.
Note that there are many types of barrel so be sure to choose the correct one for your needs.