Prefix | Abbr | Value | Name |
yotta | Y | 1 x 10 24 | septillion |
zetta | Z | 1 x 10 21 | sextillion |
exa | E | 1 x 10 18 | quintillion |
peta | P | 1 x 10 15 | quadrillion |
tera | T | 1 x 10 12 | trillion |
giga | G | 1 x 10 9 | billion |
mega | M | 1 x 10 6 | million |
kilo | k | 1 x 10 3 | thousand |
hecto | h | 1 x 10 2 | hundred |
deka | da | 1 x 10 1 | ten |
Factor of One | ******* | 1 x 10 0 | one |
deci | d | 1 x 10 -1 | tenth |
centi | c | 1 x 10 -2 | hundredth |
milli | m | 1 x 10 -3 | thousandth |
micro | u | 1 x 10 -6 | millionth |
nano | n | 1 x 10 -9 | billionth |
pico | p | 1 x 10 -12 | trillionth |
femto | f | 1 x 10 -15 | quadrillionth |
atto | a | 1 x 10 -18 | quintillionth |
zepto | z | 1 x 10 -21 | sextillionth |
yocto | y | 1 x 10 -24 | septillionth |
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The names of the values (billion, trillion, etc) is the American usage.
Sometimes (especially with capacitors), the prefix "micromicro" is used in place of pico.
The Greek lower case letter 'mu' μ was formerly the abbreviation for 'micro'.
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