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SI System Prefixes Conversion
An SI prefix (also known as a metric prefix) is a name or associated symbol that precedes a basic unit of measure (or its symbol) to form a decimal multiple or submultiple. The abbreviation SI is from the French language name Système International d’Unités (also known as International System of Units). SI prefixes are used to reduce the number of zeros shown in numerical quantities. For example, one-billionth of an ampere (a small electrical current) can be written as 0.000000001ampere. In symbol form, this is written as 0.000000001A. Using an SI prefix, this is equivalent to 1 nanoampere or 1 nA. The SI prefixes are standardized by the Bureau International des Poids et Mesures (BIPM, also known as the International Bureau of Weights and Measures) and are the product of four resolutions dating from 1960 to 1991.
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atto (symbol a) is a prefix in the International System of Units denoting a factor of 10
^{-18}
or 0.000000000000000001.
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Convert from atto
none
yotta (Y)
zetta (Z)
exa (E)
peta (P)
tera (T)
giga (G)
mega (M)
kilo (k)
hecto (h)
deca (da)
deci (d)
centi (c)
milli (m)
micro (µ)
nano (n)
pico (p)
femto (f)
atto (a)
zepto (z)
yocto (y)
Value
...calculating...
Format result
0 decimals
1 decimals
2 decimals
3 decimals
4 decimals
5 decimals
6 decimals
7 decimals
1 atto is equal to:
Common
none
1 x 10
^{-18}
yotta
1 x 10
^{-42}
zetta
1 x 10
^{-39}
exa
1 x 10
^{-36}
peta
1 x 10
^{-33}
tera
1 x 10
^{-30}
giga
1 x 10
^{-27}
mega
1 x 10
^{-24}
kilo
1 x 10
^{-21}
hecto
1 x 10
^{-20}
deca
1 x 10
^{-19}
deci
1 x 10
^{-17}
centi
1 x 10
^{-16}
milli
1 x 10
^{-15}
micro
1 x 10
^{-12}
nano
1 x 10
^{-09}
pico
1 x 10
^{-06}
femto
0.001
atto
1
zepto
1000
yocto
1000000
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