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Metric Prefix
A metric prefix is a unit prefix that precedes a basic unit of measure to indicate a multiple or fraction of the unit.
| Text | Symbol | Factor | Power |
|---|---|---|---|
| yotta | Y | 1000000000000000000000000 | 1024 |
| zetta | Z | 1000000000000000000000 | 1021 |
| exa | E | 1000000000000000000 | 1018 |
| peta | P | 1000000000000000 | 1015 |
| tera | T | 1000000000000 | 1012 |
| giga | G | 1000000000 | 109 |
| mega | M | 1000000 | 106 |
| kilo | k | 1000 | 103 |
| hecto | h | 100 | 102 |
| deca | da | 10 | 101 |
| (none) | (none) | 1 | 100 |
| deci | d | 0.1 | 10−1 |
| centi | c | 0.01 | 10−2 |
| milli | m | 0.001 | 10−3 |
| micro | μ | 0.000001 | 10−6 |
| nano | n | 0.000000001 | 10−9 |
| pico | p | 0.000000000001 | 10−12 |
| femto | f | 0.000000000000001 | 10−15 |
| atto | a | 0.000000000000000001 | 10−18 |
| zepto | z | 0.000000000000000000001 | 10−21 |
| yocto | y | 0.000000000000000000000001 | 10−24 |