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Prefixes for Basic Metric Units

Prefixes for Basic Metric Units
Multiples
PrefixAbbreviationPower of 10Equivalent
deka- or deca-da101ten
hecto-h102hundred
kilo-k103thousand
mega-M106million
giga-G109billion
tera-T1012trillion
peta-P1015quadrillion
exa-E1018quintillion
zetta-Z1021sextillion
yotta-Y1024septillion
Fractions
PrefixAbbreviationPower of 10Equivalent
deci-d10-1tenth
centi-c10-2hundredth
milli-m10-3thousandth
micro-μ10-6millionth
nano-n10-9billionth
pico-p10-12trillionth
femto-f10-15quadrillionth
atto-a10-18quintillionth
zepto-z10-21sextillionth
yocto-y10-24septillionth

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

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