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Latest revision as of 16:45, 26 October 2009
UNITS(1) UNIX Programmer's Manual UNITS(1)
Contents
NAME
units - conversion program
SYNOPSIS
units
DESCRIPTION
_U_n_i_t_s converts quantities expressed in various standard
scales to their equivalents in other scales. It works
interactively in this fashion:
_Y_o_u _h_a_v_e: inch
_Y_o_u _w_a_n_t: cm
* _2._5_4_0_0_0_e+_0_0
/ _3._9_3_7_0_1_e-_0_1
A quantity is specified as a multiplicative combination of
units optionally preceded by a numeric multiplier. Powers
are indicated by suffixed positive integers, division by the
usual sign:
_Y_o_u _h_a_v_e: 15 pounds force/in2
_Y_o_u _w_a_n_t: atm
* _1._0_2_0_6_9_e+_0_0
/ _9._7_9_7_3_0_e-_0_1
_U_n_i_t_s only does multiplicative scale changes. Thus it can
convert Kelvin to Rankine, but not Centigrade to Fahrenheit.
Most familiar units, abbreviations, and metric prefixes are
recognized, together with a generous leavening of exotica
and a few constants of nature including:
pi 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
`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'. Currency is
denoted `belgiumfranc', `britainpound', ...
For a complete list of units, `cat /usr/lib/units'.
FILES
/usr/lib/units
BUGS
Don't base your financial plans on the currency conversions.