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73 lines
1.6 KiB
Plaintext
73 lines
1.6 KiB
Plaintext
.if n .ds / /
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.if t .ds / \z/\h'\w'*'u'
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.TH UNITS 1
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.SH NAME
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units \- conversion program
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.SH SYNOPSIS
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.B units
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.SH DESCRIPTION
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.I Units
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converts quantities expressed
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in various standard scales to
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their equivalents in other scales.
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It works interactively in this fashion:
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.PP
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.I " You have:"
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inch
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.br
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.I " You want:"
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cm
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.br
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.I " * 2.54000e+00
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.br
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.I " \*/ 3.93701e\-01
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.PP
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A quantity is specified as a multiplicative combination of
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units optionally preceded by a numeric multiplier.
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Powers are indicated by suffixed positive integers,
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division by the usual sign:
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.PP
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.I " You have:"
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15 pounds force/in2
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.br
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.I " You want:"
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atm
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.br
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.I " * 1.02069e+00"
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.br
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.I " \*/ 9.79730e\-01"
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.PP
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.I Units
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only does multiplicative scale changes.
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Thus it can convert Kelvin to Rankine, but not Centigrade to
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Fahrenheit.
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Most familiar units,
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abbreviations, and metric prefixes are recognized,
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together with a generous leavening of exotica
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and a few constants of nature including:
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.PP
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.nf
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pi ratio of circumference to diameter
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c speed of light
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e charge on an electron
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g acceleration of gravity
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force same as g
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mole Avogadro's number
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water pressure head per unit height of water
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au astronomical unit
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.PP
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.fi
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`Pound' is a unit of
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mass.
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Compound names are run together, e.g. `lightyear'.
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British units that differ from their US counterparts
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are prefixed thus: `brgallon'.
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Currency is denoted `belgiumfranc', `britainpound', ...
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.PP
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For a complete list of units, `cat /usr/lib/units'.
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.SH FILES
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/usr/lib/units
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.SH BUGS
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Don't base your
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financial plans on the currency conversions.
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