| Metric System | |||||
| Prefix | Symbol | Mathematical power | Number | Name | |
| exa | E | 10 18 | 1 000 000 000 000 000 000 | one quintillion | |
| peta | P | 10 15 | 1 000 000 000 000 000 | one quadrillion | |
| tera | T | 10 12 | 1 000 000 000 000 | one trillion | |
| giga | G (or B) | 10 9 | 1 000 000 000 | one billion (or milliard) | |
| mega | M | 10 6 | 1 000 000 | one million | |
| kilo | k | 10 3 | 1 000 | one thousand | |
| hecto | h | 10 2 | 100 | one hundred | |
| deca | da | 10 1 | 10 | ten | |
| basic unit | 10 0 | 1 | one | ||
| deci | d | 10-1 | 0.1 | one tenth | |
| centi | c | 10-2 | 0.01 | one hundredth | |
| milli | m | 10-3 | 0.001 | one thousandth | |
| micro | μ | 10-6 | 0.000 001 | one millionth | |
| nano | n | 10-9 | 0.000 000 001 | one billionth (or milliardth) | |
| pico | p | 10-12 | 0.000 000 000 001 | one trillionth | |
| femto | f | 10-15 | 0.000 000 000 000 001 | one quadrillionth | |
| atto | a | 10-18 | 0.000 000 000 000 000 001 | one quintillionth | |