Prefix

Symbol

Decimal

Exponential

exa-

E

1000000000000000000

10¹⁸

peta-

P

1000000000000000

10¹⁵

tera-

T

1000000000000

10¹²

giga

G

1000000000

10⁹

mega

M

1000000

10⁶

kilo-

k

1000

10³

hecto-

h

100

10²

deka

da

10

10¹

-

1

1

deci

d

0.1

10^-1

centi-

c

0.01

10^-2

milli-

m

0.001

10^-3

micro-

µ

0.000001

10^-6

nano-

n

0.000000001

10^-9

pico-

p

0.000000000001

10^-12

femto-

f

0.000000000000001

10^-15

atto-

a

0.000000000000000001

10^-18