SI prefixes
Prefixes for larger quantities
| Name |
Symbol |
Factor |
| deka |
da |
\(\times 10^1\) |
| hecto |
h |
\(\times 10^2\) |
| kilo |
k |
\(\times 10^3\) |
| mega |
M |
\(\times 10^6\) |
| giga |
G |
\(\times 10^9\) |
| tera |
T |
\(\times 10^{12}\) |
| peta |
P |
\(\times 10^{15}\) |
| exa |
E |
\(\times 10^{18}\) |
| zetta |
Z |
\(\times 10^{21}\) |
| yotta |
Y |
\(\times 10^{24}\) |
| ronna |
R |
\(\times 10^{27}\) |
| quetta |
Q |
\(\times 10^{30}\) |
Prefixes for smaller quantities
| Name |
Symbol |
Factor |
| deci |
d |
\(\times 10^{-1}\) |
| centi |
c |
\(\times 10^{-2}\) |
| milli |
m |
\(\times 10^{-3}\) |
| micro |
\(\mu\) |
\(\times 10^{-6}\) |
| nano |
n |
\(\times 10^{-9}\) |
| pico |
p |
\(\times 10^{-12}\) |
| femto |
d |
\(\times 10^{-15}\) |
| atto |
a |
\(\times 10^{-18}\) |
| zepto |
z |
\(\times 10^{-21}\) |
| yocto |
y |
\(\times 10^{-24}\) |
| ronto |
r |
\(\times 10^{-27}\) |
| quecto |
q |
\(\times 10^{-30}\) |