單位/公制前綴
出自六年制學程
| 前綴 | 符號 | 數值 | 科學符號 |
| yotta | Y | 1,000,000,000,000,000,000,000,000 | 1024 |
| zetta | Z | 1,000,000,000,000,000,000,000 | 1021 |
| exa | E | 1,000,000,000,000,000,000 | 1018 |
| peta | P | 1,000,000,000,000,000 | 1015 |
| tera | T | 1,000,000,000,000 | 1012 |
| giga | G | 1,000,000,000 | 109 |
| mega | M | 1,000,000 | 106 |
| kilo | k | 1,000 | 103 |
| hecto | h | 100 | 102 |
| deca | da | 10 | 101 |
| 無前綴 | 1 | 100 | |
| deci | d | 0.1 | 10¯1 |
| centi | c | 0.01 | 10¯2 |
| milli(毫) | m | 0.001 | 10¯3 |
| micro(微) | μ | 0.000001 | 10¯6 |
| nano(奈) | n | 0.000000001 | 10¯9 |
| pico(皮) | p | 0.000000000001 | 10¯12 |
| femto(飛) | f | 0.000000000000001 | 10¯15 |
| atto(阿) | a | 0.000000000000000001 | 10¯18 |
| zepto(介) | z | 0.000000000000000000001 | 10¯21 |
| yocto(攸) | y | 0.000000000000000000000001 | 10¯24 |
