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units converts quantities expressed in various standard scales to their equivalents in other scales. It works interactively in this fashion:
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You have:~~inch
You want:~~cm
* 2.540000e+00
/ 3.937008e-01
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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:
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You have:~~15 lbs force/in2
You want:~~atm
* 1.020689e+00
/ 9.797299e-01
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units only does multiplicative scale changes; thus it can convert Kelvin to Rankine, but not Celsius 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:
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pi
- ratio of circumference to diameter,
-
c
- speed of light,
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e
- charge on an electron,
-
g
- acceleration of gravity,
-
force
- same as g,
-
mole
- Avogadro's number,
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water
- pressure head per unit height of water,
-
au
- astronomical unit.
Pound is not recognized as a unit of mass; lb is. Compound names are run together, (for example, lightyear). British units that differ from
their U.S. counterparts are prefixed thus: brgallon. For a complete list of units, type:
cat /usr/share/lib/unittab
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