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SI unit prefixes

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The SI unit prefixes are given in the table below.

prefixsymbolfactor
yocto y 10−24
zepto z 10−21
atto a 10−18
femto f 10−15
pico p 10−12
nano n 10−9
micro μ 10−6
milli m 10−3
centi c 10−2
deci d 10−1
deka da 101
hecto h 102
kilo k 103
mega M 106
giga G 109
tera T 1012
peta P 1015
exa E 1018
zetta Z 1021
yotta Y 1024

Here is an example of using the SI unit prefixes: A centimeter is 1 meter * 10−2 or in scientific notation, 1 × 10−2 meters.

Reference: National Institute of Standards and Technology, http://physics.nist.gov/cuu/Units/


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See Also: SI units and derivations


This is version 10 of SI unit prefixes, born on 2004-11-18, modified 2007-07-01.
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Physics Classification: 06.20.Fn (Units and standards)

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