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# SI Prefix Converter

Last updated: Saturday, April 29, 2023

SI prefixes, also known as metric prefixes, are a set of commonly used prefixes that are added to the names of basic SI units to form decimal multiples or submultiples of those units. They provide a simple and consistent way of expressing values that are too large or too small to be conveniently written in standard decimal notation.

There are 20 SI prefixes, each representing a different power of ten. Some of the most commonly used prefixes are:

kilo- (k): 10^3

mega- (M): 10^6

giga- (G): 10^9

tera- (T): 10^12

peta- (P): 10^15

exa- (E): 10^18

These prefixes can be applied to any of the basic SI units, such as meter, gram, or second, to create multiples or submultiples of those units. For example, a kilometer is 1000 meters, a megawatt is 1 million watts, and a picosecond is one trillionth of a second.

Using SI prefixes can make it easier to work with very large or very small values, and they are widely used in fields such as science, engineering, and technology.

Total number of units: base units (21) - derived units (0)
Total possible conversions: base units (420) - derived units (0)
Prefix       Base unit
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atto
[ a ]
centi
[ c ]
deca
[ da ]
deci
[ d ]
exa
[ E ]
femto
[ f ]
giga
[ G ]
hecto
[ h ]
kilo
[ k ]
mega
[ M ]
micro
[ µ ]
milli
[ m ]
nano
[ n ]
one
[ _ ]
peta
[ P ]
pico
[ p ]
tera
[ T ]
yocto
[ y ]
yotta
[ Y ]
zepto
[ z ]
zetta
[ Z ]
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