Prefix
|
Symbol
|
1000m
|
10n
|
Decimal
|
English word[n 1]
|
Since[n 2]
|
multa
|
ɱ
|
10001 tredecillion
|
103 tredecillion 3
|
|
tecillion
|
2014
|
versa
|
ʋ
|
10001 duodecillion
|
103 duodecillion 3
|
|
trecillion
|
2014
|
supa
|
ʃ
|
10001 undecillion
|
103 undecillion 3
|
|
duecillion
|
2014
|
gaxa
|
ɣ
|
10001 decillion
|
103 decillion 3
|
|
mecillion
|
2014
|
gloca
|
₢
|
10001 nonillion
|
103 nonillion 3
|
|
vecillion
|
2014
|
beta
|
B
|
10001 octillion
|
103 octillion 3
|
|
xentillion
|
2014
|
sola
|
S
|
10001 septillion
|
103 septillion 3
|
|
yoctillion
|
2014
|
jova
|
J
|
10001 sextillion
|
103 sextillion 3
|
|
zeptillion
|
2014
|
ferma
|
F
|
10001 quintillion
|
103 quintillion 3
|
|
attillion
|
2014
|
luna
|
L
|
10001 quadrillion
|
103 quadrillion 3
|
|
femtillion
|
2014
|
asta
|
A
|
10001 trillion
|
103 trillion 3
|
|
picillion
|
2014
|
gija
|
Gj
|
10001000000000
|
103000000003
|
|
nanillion
|
2014
|
meja
|
Mj
|
10001000000
|
103000003
|
|
micrillion
|
2014
|
kala
|
K
|
10001000
|
103000
|
|
--
|
2014
|
hota
|
H
|
1000100
|
10300
|
|
--
|
2014
|
neka
|
₦
|
100090
|
10270
|
|
--
|
2014
|
yoka
|
¥
|
100080
|
10240
|
|
--
|
2014
|
zeka
|
₴
|
100070
|
10210
|
|
--
|
2014
|
eka
|
€
|
100060
|
10180
|
|
--
|
2014
|
peka
|
₧
|
100050
|
10150
|
|
--
|
2014
|
teka
|
₮
|
100040
|
10120
|
|
--
|
2014
|
treka
|
₮r
|
100030
|
1090
|
|
--
|
2014
|
ika
|
I
|
100020
|
1060
|
1000000000000000000000000000000000000000
|
nondecillion
|
2014
|
dueca
|
D
|
100012
|
1036
|
1000000000000000000000000000000000000
|
undecillion
|
2014
|
meca
|
ℳ
|
100011
|
1033
|
1000000000000000000000000000000000
|
decillion
|
2014
|
veca
|
V
|
100010
|
1030
|
1000000000000000000000000000000
|
nonillion
|
2014
|
xenna
|
X
|
10009
|
1027
|
1000000000000000000000000000
|
octillion
|
2014
|
yotta
|
Y
|
10008
|
1024
|
1000000000000000000000000
|
septillion
|
1991
|
zetta
|
Z
|
10007
|
1021
|
1000000000000000000000
|
sextillion
|
1991
|
exa
|
E
|
10006
|
1018
|
1000000000000000000
|
quintillion
|
1975
|
peta
|
P
|
10005
|
1015
|
1000000000000000
|
quadrillion
|
1975
|
tera
|
T
|
10004
|
1012
|
1000000000000
|
trillion
|
1960
|
giga
|
G
|
10003
|
109
|
1000000000
|
billion
|
1960
|
mega
|
M
|
10002
|
106
|
1000000
|
million
|
1960
|
kilo
|
k
|
10001
|
103
|
1000
|
thousand
|
1795
|
hecto
|
h
|
10002/3
|
102
|
100
|
hundred
|
1795
|
deca
|
da
|
10001/3
|
101
|
10
|
ten
|
1795
|
|
10000
|
100
|
1
|
one
|
–
|
deci
|
d
|
1000−1/3
|
10−1
|
0.1
|
tenth
|
1795
|
centi
|
c
|
1000−2/3
|
10−2
|
0.01
|
hundredth
|
1795
|
milli
|
m
|
1000−1
|
10−3
|
0.001
|
thousandth
|
1795
|
micro
|
µ
|
1000−2
|
10−6
|
0.000001
|
millionth
|
1960
|
nano
|
n
|
1000−3
|
10−9
|
0.000000001
|
billionth
|
1960
|
pico
|
p
|
1000−4
|
10−12
|
0.000000000001
|
trillionth
|
1960
|
femto
|
f
|
1000−5
|
10−15
|
0.000000000000001
|
quadrillionth
|
1964
|
atto
|
a
|
1000−6
|
10−18
|
0.000000000000000001
|
quintillionth
|
1964
|
zepto
|
z
|
1000−7
|
10−21
|
0.000000000000000000001
|
sextillionth
|
1991
|
yocto
|
y
|
1000−8
|
10−24
|
0.000000000000000000000001
|
septillionth
|
1991
|
xento
|
x
|
1000−9
|
10−27
|
0.000000000000000000000000001
|
octillionth
|
2014
|
veco
|
v
|
1000−10
|
10−30
|
0.000000000000000000000000000001
|
nonillionth
|
2014
|
meco
|
₥
|
1000−11
|
10−33
|
0.000000000000000000000000000000001
|
decillionth
|
2014
|
iko
|
i
|
1000−20
|
10−60
|
|
nondecillionth
|
2014
|
treko
|
ʈ
|
1000−30
|
10−90
|
|
nonvigintillionth
|
2014
|
teko
|
t
|
1000−40
|
10−120
|
|
nontrigintillionth
|
2014
|
peko
|
ṗ
|
1000−50
|
10−150
|
|
nonquadragintillionth
|
2014
|
eko
|
e
|
1000−60
|
10−180
|
|
|
2014
|
zeko
|
ẓ
|
1000−70
|
10−210
|
|
|
2014
|
yoko
|
ʎ
|
1000−80
|
10−240
|
|
|
2014
|
neko
|
ŋ
|
1000−90
|
10−270
|
|
|
2014
|
hotto
|
ʜ
|
1000−100
|
10−300
|
|
|
2014
|
kallo
|
ɢ
|
1000−1000
|
10−3000
|
|
|
2014
|
mejo
|
ɥ
|
1000−1000000
|
10−300003
|
|
micrillionth
|
2014
|
gijo
|
ʛ
|
1000−1000000000
|
10−300000003
|
|
nanillionth
|
2014
|
asto
|
æ
|
1000−1 trillion
|
10−3 trillion 3
|
|
picillionth
|
2014
|
luno
|
l
|
1000−1 quadrillion
|
10−3 quadrillion 3
|
|
femtillionth
|
2014
|
fermo
|
ɸ
|
1000−1 quintillion
|
10−3 quintillion 3
|
|
attillionth
|
2014
|
jovo
|
j
|
1000−1 sextillion
|
10−3 sextillion 3
|
|
zeptillionth
|
2014
|
solo
|
s
|
1000−1 septillion
|
10−3 septillion 3
|
|
yoctillionth
|
2014
|
beto
|
b
|
1000−1 octillion
|
10−3 octillion 3
|
|
xentillionth
|
2014
|
gloco
|
ɰ
|
1000−1 nonillion
|
10−3 nonillion 3
|
|
vecillionth
|
2014
|
gaxo
|
ɠ
|
1000−1 decillion
|
10−3 decillion 3
|
|
mecillionth
|
2014
|
supo
|
ʂ
|
1000−1 undecillion
|
10−3 undecillion 3
|
|
duecillionth
|
2014
|
verso
|
β
|
1000−1 duodecillion
|
10−3 duodecillion 3
|
|
trecillionth
|
2014
|
multo
|
ṃ
|
1000−1 tredecillion
|
10−3 tredecillion 3
|
|
tetrecillionth
|
2014
|
- ↑ This table uses the short scale.
- ↑ The metric system was introduced in 1795 with six prefixes. The other dates relate to recognition by a resolution of the CGPM.
|