SYNOPSIS

       udunits [-d] [units-file]

DESCRIPTION

       This  utility  uses the Unidata udunits(3) library to dis­
       play the transformation necessary to convert from one unit
       to another.

       units-file  contains  unit definitions and is used to ini­
       tialize the udunits(3) library.  If  not  specified,  then
       the   default  units-file  determined  by  the  udunits(3)
       library is used.

       This utility works interactively and has  two  modes.   In
       one  mode, both an input and output unit specification are
       given, causing the utility to print the conversion between
       them:

           You have: inch
           You want: cm
               <cm> = <inch>*2.54
               <cm> = <inch>/0.393701

           You have: (15 lbs force/in)^2
           You want: atm2
               <atm2> = <(15 lbs force/in)^2>*0.995719
               <atm2> = <(15 lbs force/in)^2>/1.0043

           You have: celsius
           You want: fahrenheit
               <fahrenheit> = <celsius>*1.8 + 32
               <fahrenheit> = <celsius>/0.555556 + 32

       In  the  other  mode,  only an input unit specification is
       given.  This causes the utility to print the definition --
       in standard units -- of the input unit:

              You have: fahrenheit
              You want:
                  Definition: "0.555556 kelvin @ 255.372"

              You have: geopotential meters
              You want:
                  Definition: "9.80665 meter2 second-2"

       See  the  manual  page  on  the  udunits(3)  library for a
       description of the unit-specification grammar.

OPTIONS

       -d     Have the yacc(1)-generated parser print  diagnostic
              messages.   The  default is no messages.  This only
              works if the parser was compiled with the C prepro­