Prefix Name
Prefix Symbol
Base 10
English Word
yotta
Y
1024
septillion
zetta
Z
1021
sextillion
exa
E
1018
quintillion
peta
P
1015
quadrillion
tera
T
1012
trillion
giga
G
109
billion
mega
M
106
million
kilo
k
103
thousand
hecto
h
102
hundred
deca
da
101
ten
100
one
deci
d
10−1
tenth
centi
c
10−2
hundredth
milli
m
10−3
thousandth
micro
μ
10−6
millionth
nano
n
10−9
billionth
pico
p
10−12
trillionth
femto
f
10−15
quadrillionth
atto
a
10−18
quintillionth
zepto
z
10−21
sextillionth
yocto
y
10−24
septillionth