The output from a SQL Server trace in profiler contains the columns CPU and Duration (amongst others). What units are these values in?
CPU is in milliseconds. In sql server 2005 and later, duration is in microseconds when saved to a file or a table, and milliseconds in the user interface. In sqlserver 2000, it is always in milliseconds. From MSDN.
User jerryhung gives a more accurate version-specific information in a comment:
Beginning with SQL Server 2005, the server reports the duration of an event in microseconds (one millionth, or 10-6 of a second) and the amount of CPU time used by the event in milliseconds (one thousandth, or 10-3 of a second). In SQL Server 2000, the server reported both duration and CPU time in milliseconds. In SQL Server 2005 and later, the SQL Server Profiler graphical user interface displays the Duration column in milliseconds by default, but when a trace is saved to either a file or a database table, the Duration column value is written in microseconds.