 
 
| 次冪 | 字首 | 符號 | 次冪 | 字首 | 符號 | |
| atto | a | deka | da | |||
| femto | f | hecto | h | |||
| pico | p | kilo | k | |||
| nano | n | mega | M | |||
| micro | giga | G | ||||
| milli | m | tera | T | |||
| centi | c | peta | P | |||
| deci | d | exa | E | 
 
 
| 次冪 | 字首 | 符號 | 次冪 | 字首 | 符號 | |
| atto | a | deka | da | |||
| femto | f | hecto | h | |||
| pico | p | kilo | k | |||
| nano | n | mega | M | |||
| micro | giga | G | ||||
| milli | m | tera | T | |||
| centi | c | peta | P | |||
| deci | d | exa | E |