SI prefixes

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SI prefixes

Prefix

Symbol

Power

Multiple in full

Exa-

E

1018

1,000,000,000,000,000,000

Peta-

P

1015

1,000,000,000,000,000

Tera-

T

1012

1,000,000,000,000

Giga-

G

109

1,000,000,000

Mega-

M

106

1,000,000

Kilo-

k

103

1,000

Hecto-

h

102

100

Deca-

da

101

10

Deci-

d

10−1

0.1

Centi-

c

10−2

0.01

Milli-

m

10−3

0.001

Micro-

μ

10−6

0.000001

Nano-

n

10−9

0.000000001

Pico-

p

10−12

0.000000000001

Femto-

f

10−15

0.000000000000001

Atto-

a

10−18

0.000000000000000001