Numerical Prefixes: Mathematical, Digital, IEC

These are the commonly used numerical prefixes in the English language, but most seem to translate with European languages.

Mathematical
Prefix	Symbol	Name	Multiplier
vendeko	v	decillionth	10-33
		nonillionth	10-30
xenno	x	octillionth	10-27
yocto	y	septillionth	10-24
zepto	z	sextillionth	10-21
atto	a	quintillionth	10-18
femto	f	quadrillionth	10-15
pico	p	trillionth	10-12
nano	n	billionth	10-9
micro	µ	millionth	10-6
milli	m	thousandth	10-3
centi	c	hundredth	10-2
deci	d	tenth	10-1
deka	da	ten	101
hecto	h	hundred	102
kilo	k	thousand	103
mega	M	million	106
giga	G	billion†	109
tera	T	trillion†	1012
peta	P	quadrillion	1015
exa	E	quintillion	1018
zetta	Z	sextillion	1021
yotta	Y	septillion	1024
xenna	X	octillion	1027
	V	nonillion	1030
vendeka	V	decillion	1033
		undecillion	1036
		duodecillion	1039
		tredecillion	1042
		quattodecillion	1045
		quindecillion	1048
		sexdecillion	1051
		septendecillion	1054
		octodecillion	1057
		novemdecillion	1060
		vigindecillion	1063
		googol	10100
		googolplex	10google

 

Digital (Base 2)
Prefix	Symbol	Multiplier	Value
peta	P	250	1,125,899,906,842,624
tera	T	240	1,099,511,627,776
giga	G	230	1,073,741,824
Mega	M	220	1,048,576
kilo	k	210	1,024

 

IEC Version
Prefix	Symbol	Multiplier	Value
exbi	Ei	260	1,152,921,504,606,846,976
pebi	Pi	250	1,125,899,906,842,624
tebi	Ti	240	1,099,511,627,776
gibi	Gi	230	1,073,741,824
mebi	Mi	220	1,048,576
kibi	Ki	210	1,024

 

Non-Technical Writing
Prefix	Value
uni,  mono	1
bi	2
tri	3
quadr	4
quint, penta	5
hex, sex	6
hept, sept	7
octo	8
novem	9
deca, deka	10

 

† 1,000,000,000 is called "one billion" in the U.S., U.K., France (before May 3, 1961), Brazil, Puerto Rico, Greece, and in Italy, Russia and Turkey it is referred to as "one billion" when written out, but as "one milliard" when written as 10⁹. 1,000,000,000,000 is called "one trillion" in the U.S., but is called "one billion" in Germany, the Netherlands, Austria, Sweden, Norway, Denmark, Finland, France (after May 3, 1961), Portugal, Poland. It is best to check for current definitions for each country to be certain to get it right, or better yet, just write it out numerically to avoid confusion.

Thanks to Duncan for the zepto info.