Prefix

Meaning

Symbol

Factor

Value

yotta

septillion

Y

10²⁴

1000000000000000000000000

zetta

sextillion

Z

10²¹

1000000000000000000000

exa

quintillion

E

10¹⁸

1000000000000000000

peta

quadrillion

P

10¹⁵

1000000000000000

tera

trillion

T

10¹²

1000000000000

giga

billion

G

10⁹

1000000000

mega

million

M

10⁶

1000000

kilo

thousand

k

10³

1000

hecto

hundred

h

10²

100

deka

ten

da

10¹

10

deci

tenths

d

10^-1

0.1

centi

hundredths

c

10^-2

0.01

milli

thousandths

m

10^-3

0.001

micro

millionths

u

10^-6

0.000001

nano

billionths

n

10^-9

0.000000001

pico

trillionths

p

10^-12

0.000000000001

femto

quadrillionths

f

10^-15

0.0000000000000001

atto

quintillionths

a

10^-18

0.000000000000000001

zepto

sextillionths

z

10^-21

0.000000000000000000001

yocto

septillionths

y

10^-24

0.000000000000000000000001