| Prefix |
Base 10 |
Decimal |
Short Scale |
Long Scale |
| yotta |
Y |
1024 |
1 000 000 000 000 000 000 000 000 |
septillion |
quadrillion |
| zetta |
Z |
1021 |
1 000 000 000 000 000 000 000 |
sextillion |
trilliard |
| exa |
E |
1018 |
1 000 000 000 000 000 000 |
quintillion |
trillion |
| peta |
P |
1015 |
1 000 000 000 000 000 |
quadrillion |
billiard |
| tera |
T |
1012 |
1 000 000 000 000 |
trillion |
billion |
| giga |
G |
109 |
1 000 000 000 |
billion |
milliard |
| mega |
M |
106 |
1 000 000 |
million |
| kilo |
k |
103 |
1 000 |
thousand |
| hecto |
h |
102 |
100 |
hundred |
| deca |
da |
101 |
10 |
ten |
|
100 |
1 |
one |
| deci |
d |
10−1 |
0.1 |
tenth |
| centi |
c |
10−2 |
0.01 |
hundredth |
| milli |
m |
10−3 |
0.001 |
thousandth |
| micro |
μ |
10−6 |
0.000 001 |
millionth |
| nano |
n |
10−9 |
0.000 000 001 |
billionth |
milliardth |
| pico |
p |
10−12 |
0.000 000 000 001 |
trillionth |
billionth |
| femto |
f |
10−15 |
0.000 000 000 000 001 |
quadrillionth |
billiardth |
| atto |
a |
10−18 |
0.000 000 000 000 000 001 |
quintillionth |
trillionth |
| zepto |
z |
10−21 |
0.000 000 000 000 000 000 001 |
sextillionth |
trilliardth |
| yocto |
y |
10−24 |
0.000 000 000 000 000 000 000 001 |
septillionth |
quadrillionth |
