Lots of units used in the United States are not in the SI - for example the units of length (inch, foot, etc.), of volume (quart, gallon, cubic feet), of mass (avoirdupois pound, ton), etc.In the international community, some of the units commonly used aren't in the SI either - for example, most units of time (minutes, hours, days, weeks, years), the unit of temperature (Celsius, also called Centigrade), units of speed such as kilometers per hour, and the kWh as a unit of energy.
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The cubic meter.
The standard International System of Units (SI) unit of mass is the kilogram (kg).
In the International System of units it is the Newton, which is equal to 1kg• m/s2.
The international (SI) unit of mass is the kilogram.
The system of measurement based on the kilogram and the meter is the "metric system" also called the "International System of Units" or SI. This can also be called M.K.S System.