Names of small numbers

This article lists and discusses the usage and derivation of names of small numbers.^[1]

Table of names

The following table lists English language names of small numbers used in the long and short scales, along with the power of ten, engineering notation, and International System of Units (SI) symbols and prefixes.^{[2][3][4][5][6][7][8]}

Power of ten	Engineering notation	Short scale (U.S. and modern British)	Long scale (continental Europe, archaic British, and India)	SI symbol	SI prefix
100	1	One	One
10−1	100×10−3	Tenth	Tenth	d	deci-
10−2	10×10−3	Hundredth	Hundredth	c	centi-
10−3	1×10−3	Thousandth	Thousandth	m	milli-
10−4	100×10−6	Ten thousandth	Ten thousandth
10−5	10×10−6	Hundred thousandth	Hundred thousandth
10−6	1×10−6	Millionth	Millionth	µ	micro-
10−9	1×10−9	Billionth	—	n	nano-
10−12	1×10−12	Trillionth	Billionth	p	pico-
10−15	1×10−15	Quadrillionth	—	f	femto-
10−18	1×10−18	Quintillionth	Trillionth	a	atto-
10−21	1×10−21	Sextillionth	—	z	zepto-
10−24	1×10−24	Septillionth	Quadrillionth	y	yocto-
10−27	1×10−27	Octillionth	—
10−30	1×10−30	Nonillionth	Quintillionth

See also

Mathematics portal

• Names of large numbers
• Orders of magnitude (numbers)
• List of numbers

References

1. ^ http://turing.cs.camosun.bc.ca/COMP166/resources/floatingpoint.html
2. ^ American Heritage Dictionary, 4th edition, ISBN 0-395-82517-2. [1]
3. ^ Oxford English Dictionary, New Edition, Oxford, UK: Oxford University Press. [2] (subscription required)
4. ^ Bureau International des Poids et Mesures (BIPM)
5. ^ US NIST Definitions of the SI units: The twenty SI prefixes
6. ^ http://www.essex1.com/people/speer/large.html
7. ^ http://library.thinkquest.org/5427/numbers.html
8. ^ http://www.uni-bonn.de/~manfear/numbers_names.php