The International System of Units (SI): Prefixes
Decimal multiples and submultiples of SI units
Decimal multiples and submultiples of SI units can be written using the SI prefixes listed below:
| Name | Symbol | Multiplying factor |
|---|---|---|
|
yotta |
Y |
1024 |
|
zetta |
Z |
1021 |
|
exa |
E |
1018 |
|
peta |
P |
1015 |
|
tera |
T |
1012 |
|
giga |
G |
109 |
|
mega |
M |
106 |
|
kilo |
k |
103 |
|
hecto |
h |
102 |
|
deca |
da |
101 |
|
deci |
d |
10–1 |
|
centi |
c |
10–2 |
|
milli |
m |
10–3 |
|
micro |
µ |
10–6 |
|
nano |
n |
10–9 |
|
pico |
p |
10–12 |
|
femto |
f |
10–15 |
|
atto |
a |
10–18 |
|
zepto |
z |
10–21 |
|
yocto |
y |
10–24 |
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