Mac OS X

Units

Go figure, there’s a command that can convert some units to other units. The units command is able to take a number of one type of units and then convert them to another. For example, to convert a mile to feet:

units "1 mile" feet

Or to convert 2 hours to seconds:

units "2 hours" seconds

For a full listing of the formats supported, check out /usr/share/misc/units.lib.