SI prefixes – Units in power of 10

While studying engineering or any subject in which we perform calulation in power of 10 then, we come across the terms like “micro”, “gega”, “milli” and symbol like “µ, n” etc. You might know about this, but let us learn more terms like yotta, exa, petta etc. This terms are known as SI prefixes or metric prefixes. Each prefix has a unique symbol that is prepended to the unit symbol.According to International system of units specifies 20 different SI prefixes or Metric prefixes :

Here is the table for 20 different prefixes with their symbol and value.

Prefixes Symbol Value
yotta Y 1024
zetta Z 1021
exa E 1018
petta P 1015
tera T 1012
giga G 109
mega M 106
killo k 103
hecto h 102
deca da 101
- 1 – one 100
deci d 10-1
centi c 10-2
milli m 10-3
micro µ 10-6
nano n 10-9
pico p 10-12
femto f 10-15
atto a 10-18
zepto z 10-21
yocto y 10-24

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