plan9 man page for units

UNITS(1)						      General Commands Manual							  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 fash-
       ion:

	      you have: inch
	      you want: cm
		  * 2.54
		  / 0.393701

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

	      + -	     add and subtract
	      * / x -:-      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,n    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 is a unit of mass.  Compound names are run together, e.g.  British units that differ from their US counterparts are prefixed thus: Cur-
       rency is denoted 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.

EXAMPLE
       you have: 15 pounds force/in2
       you want: atm
	   * 1.02069
	   / .97973

FILES
       /lib/units

SOURCE
       /sys/src/cmd/units.y

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

																	  UNITS(1)