UNITS(1)                                                 UNITS(1)

     NAME
          units - conversion program

     SYNOPSIS
          units [ -v ] [ file ]

     DESCRIPTION
          Units converts quantities expressed in various standard
          scales to their equivalents in other scales.  It works
          interactively in this fashion:

               you have: inch
               you want: cm
                   * 2.54
                    / 0.3937008

          A quantity is specified as a multiplicative combination of
          units and floating point numbers.  Operators have the fol-
          lowing precedence:

               + -            add and subtract
               * / × ÷        multiply and divide
               catenation     multiply
               ² ³ ^          exponentiation
               |              divide
               ( ... )        grouping

          Most familiar units, abbreviations, and metric prefixes are
          recognized, together with a generous leavening of exotica
          and a few constants of nature including:

               pi,π    ratio of circumference to diameter
               c       speed of light
               e       charge on an electron
               g       acceleration of gravity
               force   same as g
               mole    Avogadro's number
               water   pressure head per unit height of water
               au      astronomical unit

          The `pound' is a unit of mass.  Compound names are run
          together, e.g.  `lightyear'.  British units that differ from
          their US counterparts are prefixed thus: `brgallon'.  Cur-
          rency is denoted `belgiumfranc', `britainpound', etc.

          The complete list of units can be found in /lib/units.  A
          file argument to units specifies a file to be used instead
          of /lib/units.  The -v flag causes units to print its entire
          database.

     UNITS(1)                                                 UNITS(1)

     EXAMPLE
          you have: 15 pounds force/in²
          you want: atm
                  * 1.020689
                  / 0.9797299

     FILES
          /lib/units

     SOURCE
          /appl/cmd/units.y
          /appl/cmd/units.b

     BUGS
          Since units does only multiplicative scale changes, it can
          convert Kelvin to Rankine but not Centigrade to Fahrenheit,
          except that the latter is handled as a special case.
          Currency conversions are only as accurate as the last time
          someone updated /lib/units.