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SI base units defined
Common SI prefixes
Common SI prefixes
Common SI Prefixes
Prefix Name
Prefix Symbol
Multiplication Factor
American
1
yotta
y
10^24
septillion
2
zeta
Z
10^21
sextillion
3
exa
E
10^18
quintillion
4
peta
P
10^15
quadrillion
5
tera
T
10^12
trillion
6
giga
G
10^9
billion
7
mega
M
10^6
million
8
kilo
k
10^3
thousand
9
hecto
h
10^2
hundred
10
deka
da
10^1
ten
11
deci
d
10^-1
tenth
12
centi
c
10^-2
hundredth
13
milli
m
10^-3
thousandth
14
micro
μ
10^-6
millionth
15
nano
n
10^-9
billionth
16
pico
p
10^-12
trillionth
17
femto
f
10^15
quadrillionth
18
atto
a
10^18
quintillionth
19
zepto
z
10^-21
sextillionth
20
yocto
y
10^-24
septillionth
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