Prefixes and Multiples
Updated June 26, 2019 |
Infoplease Staff
| Prefix | Symbol | Equivalent | Multiple/submultiple |
|---|---|---|---|
| yocto | y | septillionth part | 10-24 |
| zepto | z | sextillionth part | 10-21 |
| atto | a | quintillionth part | 10-18 |
| femto | f | quadrillionth part | 10-15 |
| pico | p | trillionth part | 10-12 |
| nano | n | billionth part | 10-9 |
| micro | µ | millionth part | 10-6 |
| milli | m | thousandth part | 10-3 |
| centi | c | hundredth part | 10-2 |
| deci | d | tenth part | 10-1 |
| deka | da | tenfold | 10 |
| hecto | h | hundredfold | 102 |
| kilo | k | thousandfold | 103 |
| mega | M | millionfold | 106 |
| giga | G | billionfold | 109 |
| tera | T | trillionfold | 1012 |
| peta | P | quadrillionfold | 1015 |
| exa | E | quintillionfold | 1018 |
| zetta | Z | sextillionfold | 1021 |
| yotta | Y | septillionfold | 1024 |
| Cardinal, Ordinal, and Nominal Numbers | Numbers and Formulas | Prime Numbers between 1 and 1,000 |
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