Wolfram Language & System 10.4 (2016)|Legacy Documentation

This is documentation for an earlier version of the Wolfram Language.View current documentation (Version 11.2)


gives the unit system to assume for returned quantities.


  • $UnitSystem is set at the beginning of your Wolfram System session to the unit system specified by the geodetic location of your computer.
  • Possible values are and .
Introduced in 2014