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Other SI SI Prefixes Data main page

The SI prefixes are used to describe SI quantity units. They simplify unit expression and hence can be handled more easily. For example, 2.5 pico second (ps) is in fact 2.5 x 10-12 second; 3.4 micro meter (mm) is in fact 3.4 x 10-6 m. The prefixes and their corresponding factors are listed below:

Prefix

Symbol

Factor

yotta

Y

1024

zetta

Z

1021

exa

E

1018

peta

P

1015

tera

T

1012

giga

G

109

mega

M

106

kilo

k

103

hecto

h

102

deca

da

101

deci

d

10-1

centi

c

10-2

milli

m

10-3

micro

m

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

Other SI Data main page.


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