/home/bill/web/bin/units conversion_of_units gnu.txt
20Apr2025 initial

# https://en.wikipedia.org/wiki/Conversion_of_units
There are many standalone applications that offer the thousands of the various units with conversions. For example, the free software movement offers a command line utility GNU units for GNU and Windows.[7] The Unified Code for Units of Measure is also a popular option. 
https://en.wikipedia.org/wiki/Unified_Code_for_Units_of_Measure


# https://en.wikipedia.org/wiki/GNU_Units
GNU Units is a cross-platform computer program for conversion of units of quantities. It has a database of measurement units, including esoteric and historical units. This for instance allows conversion of velocities specified in furlongs per fortnight, and pressures specified in tons per acre. Output units are checked for consistency with the input, allowing verification of conversion of complex expressions. 

# AH HA! use this!!
$ man units 
       If you type

       units "2 liters" quarts

       then units will print

           * 2.1133764
           / 0.47317647

       and then exit.  The output tells you that 2 liters is about 2.1 quarts, or alternatively that  a  quart  is
       about 0.47 times 2 liters.

       units does not require a space between a numerical value and the unit, so the previous example can be given
       as

       units 2liters quarts

       to avoid having to quote the first argument.

       If the conversion is successful, units will return success (zero) to the calling environment.  If you enter
       non-conformable units, then units will print a message giving the reduced form of each unit and it will re‐
       turn failure (nonzero) to the calling environment.

       If the ‘--conformable’ option is given, only one unit expression is allowed, and units will print all units
       conformable with that expression; it is equivalent to giving ? at the ‘You want:’ prompt.  For example,

       units --conformable gauss
       B_FIELD   tesla
       Gs        gauss
       T         tesla
       gauss     abvolt sec / cm^2
       stT       stattesla
       statT     stattesla
       stattesla statWb/cm^2
       tesla     Wb/m^2