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The following SI units are derived from the base units and are dimensionless.

Derived units with special names

Base units can be put together to derive units of méasurement for other quantities. Some have been given names.

Non-SI units accepted for use with SI

The following units are not SI units but are "accepted for use with the International System."

The following SI prefixes can be used to prefix any of the above units to produce a multiple or submultiple of the original unit.