Meaning or Multiply By: | Prefix | Symbol | Magnitude | Meaning or Multiply By: |
| 1,000,000,000,000,000,000,000,000 | Yotta- | Y | 1024 | |
| 1,000,000,000,000,000,000,000 | Zetta- | Z | 1021 | |
| 1,000,000,000,000,000,000 | Exa- | E | 1018 | |
| 1,000,000,000,000,000 | Peta- | P | 1015 | |
| 1,000,000,000,000 | Tera- | T | 1012 | |
| 1,000,000,000 | Giga- | G | 109 | |
| 1,000,000 | Mega- | M | 106 | |
| 10,000 | myria- | my | 104 | (This is now obsolete) |
| 1,000 | kilo- | k | 103 | |
| 100 | hecto- | h | 102 | |
| 10 | deka- | da | 10 | |
| 1 | [Base] | none | 1 | 1 |
| | deci- | d | 10-1 | 0.1 |
| | centi- | c | 10-2 | 0.01 |
| | milli- | m | 10-3 | 0.001 |
| | micro- | u (mu) | 10-6 | 0.000,001 |
| | nan- | n | 10-9 | 0.000,000,001 |
| | pico- | p | 10-12 | 0.000,000,000,001 |
| | femto- | f | 10-15 | 0.000,000,000,000,001 |
| | atto- | a | 10-18 | 0.000,000,000,000,000,001 |
| | zepto | z | 10-21 | 0.000,000,000,000,000,000,001 |
| | yocto- | y | 10-24 | 0.000,000,000,000,000,000,000,001 |