Names of small numbers
Encyclopedia
This article lists and discusses the usage and derivation of names of small numbers.
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.
Table of names
The following table lists English languageEnglish language
English is a West Germanic language that arose in the Anglo-Saxon kingdoms of England and spread into what was to become south-east Scotland under the influence of the Anglian medieval kingdom of Northumbria...
names of small numbers used in the long and short scales
Long and short scales
The long and short scales are two of several different large-number naming systems used throughout the world for integer powers of ten. Many countries, including most in continental Europe, use the long scale whereas most English-speaking countries use the short scale...
, along with the power of ten, engineering notation
Engineering notation
Engineering notation is a version of scientific notation in which the powers of ten must be multiples of three...
, and International System of Units
International System of Units
The International System of Units is the modern form of the metric system and is generally a system of units of measurement devised around seven base units and the convenience of the number ten. The older metric system included several groups of units...
(SI) symbols and prefixes.
| Power of ten | Engineering notation Engineering notation Engineering notation is a version of scientific notation in which the powers of ten must be multiples of three... |
Short scale Long and short scales The long and short scales are two of several different large-number naming systems used throughout the world for integer powers of ten. Many countries, including most in continental Europe, use the long scale whereas most English-speaking countries use the short scale... (U.S. and modern British) |
Long scale Long and short scales The long and short scales are two of several different large-number naming systems used throughout the world for integer powers of ten. Many countries, including most in continental Europe, use the long scale whereas most English-speaking countries use the short scale... (continental Europe, archaic British, and India) |
SI symbol |
SI prefix SI prefix The International System of Units specifies a set of unit prefixes known as SI prefixes or metric prefixes. An SI prefix is a name that precedes a basic unit of measure to indicate a decadic multiple or fraction of the unit. Each prefix has a unique symbol that is prepended to the unit symbol... |
|---|---|---|---|---|---|
| 100 | 1 | One | One | ||
| 10−1 | 100×10−3 | Tenth Tenth Tenth can mean:* 10th, an ordinal number; as in the item in an order ten places from the beginning, following the ninth and preceding the eleventh.* 1/10, a fraction, one part of a unit divided equally into ten parts... |
Tenth | d | deci- |
| 10−2 | 10×10−3 | Hundredth Hundredth In arithmetic, a hundredth is a single part of something that has been divided equally into a hundred parts. For example, a hundredth of 675 is 6.75.A hundredth is the reciprocal of 100.... |
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 One millionth is equal to 0.000 001, or 1 x 10-6 in scientific notation. It is the reciprocal of a million, can be also written as 1/1 000 000. Units using this fraction can be indicated using the prefix "micro-" from Greek, meaning "small"... |
Millionth | µ Mu (letter) Carlos Alberto Vives Restrepo is a Grammy Award and three-time Latin Grammy Award winning-Colombian singer, composer and actor.-Biography:... |
micro- |
| 10−9 | 1×10−9 | Billionth Billionth One billionth is the reciprocal of a billion, which means it has one of two definitions depending on whether the long scale or short scale definition is being used.-Short scale countries:... |
— | n | nano- |
| 10−12 | 1×10−12 | Trillionth Trillionth One trillionth is the reciprocal of a trillion, which means it has one of two definitions depending on whether the long scale or short scale numbering system is in use.-Short scale countries:... |
Billionth | p | pico- |
| 10−15 | 1×10−15 | Quadrillionth | — | f | femto- Femto- Femto- is a prefix in the metric system denoting a factor of 10−15 or . Adopted by the 11th Conférence Générale des Poids et Mesures, it was added in 1964 to the SI... |
| 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
- Names of large numbersNames of large numbersThis article lists and discusses the usage and derivation of names of large numbers, together with their possible extensions.The following table lists those names of large numbers which are found in many English dictionaries and thus have a special claim to being "real words"...
- Orders of magnitude (numbers)Orders of magnitude (numbers)This list contains selected positive numbers in increasing order, including counts of things, dimensionless quantity and probabilities. Each number is given a name in the short scale, which is used in English speaking countries, as well as a name in the long scale, which is used in some of the...
- List of numbers