SI prefix
The International System of Units prefixes
Prefix | Symbol | 1000m | 10n |
Decimal | Short scale | Long scale |
yotta | Y | 10008 | 1024 |
1000000000000000000000000 | Septillion | Quadrillion |
zetta | Z | 10007 | 1021 |
1000000000000000000000 | Sextillion | Trilliard |
exa | E | 10006 | 1018 |
1000000000000000000 | Quintillion | Trillion |
peta | P | 10005 | 1015 |
1000000000000000 | Quadrillion | Billiard |
tera | T | 10004 | 1012 |
1000000000000 | Trillion | Billion |
giga | G | 10003 | 109 |
1000000000 | Billion | Milliard |
mega | M | 10002 | 106 |
1000000 | Million |
kilo | k | 10001 | 103 |
1000 | Thousand |
hecto | h | 10002/3 | 102 |
100 | Hundred |
deca | da | 10001/3 | 101 |
10 | Ten |
| 10000 | 100 |
1 | One |
deci | d | 1000-1/3 | 10-1 |
0.1 | Tenth |
centi | c | 1000-2/3 | 10-2 |
0.01 | Hundredth |
milli | m | 1000-1 | 10-3 |
0.001 | Thousandth |
micro | μ | 1000-2 | 10-6 |
0.000001 | Millionth |
nano | n | 1000-3 | 10-9 |
0.000000001 | Billionth | Milliardth |
pico | p | 1000-4 | 10-12 |
0.000000000001 | Trillionth | Billionth |
femto | f | 1000-5 | 10-15 |
0.000000000000001 | Quadrillionth | Billiardth |
atto | a | 1000-6 | 10-18 |
0.000000000000000001 | Quintillionth | Trillionth |
zepto | z | 1000-7 | 10-21 |
0.000000000000000000001 | Sextillionth | Trilliardth |
yocto | y | 1000-8 | 10-24 |
0.000000000000000000000001 | Septillionth | Quadrillionth |