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.[1]

## Contents

* 1 Short scale
* 2 Long scale
* 3 See also
* 4 References

## Short scale

In the short (or United States ) scale, a billionth is equal to 0.000 000 001, or 1 x 10−9 in scientific notation or standard form. The prefix for this number is nano, and is abbreviated as "n" (for example, in electronics, one nanofarad would be written as 1 nF).[2]

## Long scale

In the long (or United Kingdom ) scale, a billionth is equal to 0.000 000 000 001, or 1 x 10−12 in scientific notation or standard form. The prefix for this number is pico-, and is abbreviated as "p" (for example, in electronics, one picofarad would be written as 1 pF).[3]

## See also

* Ordinal number

## References

1. ↑ Gardner, J. W. (April 6, 1961), "How many is a billion?", New Scientist: 888, https://books.google.com/books?id=v4B2NNxjtloC&pg=PA888 .
2. ↑ Carstairs-McCarthy, Andrew (2002), An Introduction to English Morphology: Words and Their Structure, Edinburgh University Press, pp. 109–110, ISBN 9780748613267, https://books.google.com/books?id=yoNqhym0u2sC&pg=PA109 .
3. ↑ Bray, Charles (2001), Dictionary of Glass: Materials and Techniques, University of Pennsylvania Press, p. 243, ISBN 9780812236194, https://books.google.com/books?id=KbZkxDyeG18C&pg=PA243 .

Preceded by
Millionth |  Decimal
orders of magnitude | Succeeded by
Trillionth

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Orders of magnitude

Quantity|

* Acceleration
* Angular momentum
* Angular velocity
* Area
* Bit rate
* Capacitance
* Charge
* Computing
* Currency
* Current
* Data
* Density
* Energy / Energy density / Energy flow density
* Entropy
* Force
* Frequency
* Inductance
* Illuminance
* Length
* Luminance / Luminous flux
* Magnetic field
* Mass
* Molarity
* Momentum
* Numbers
* Power
* Pressure
* Probability
* Radiation
* Resistance
* Sound pressure
* Specific energy
* Specific heat capacity
* Speed
* Temperature
* Time
* Viscosity
* Voltage
* Volume

See also|

* Back-of-the-envelope calculation
* Fermi problem
* Powers of 10 and decades
* 10th
* 100th
* 1000000th
* Billionth
* Trillionth
* Metric (SI) prefix
* Macroscopic scale
* Microscopic scale
* Quantum realm

Related|

* Astronomical system of units
* Earth's location in the Universe
* "Cosmic View" (1957 essay)
* To the Moon and Beyond (1964 film)
* Cosmic Zoom (1968 film)
* Powers of Ten (1968 and 1977 films)
* Cosmic Voyage (1996 documentary)
* Cosmic Eye (2012)

* Book
* Category

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