Overview#
International System of Units (
SI, abbreviated from the French Système international (d'unités)) is the modern form of the "metric"
Unit of measurement system.
Standard prefixes for the SI units of measure#
| Prefix name | | deca | hecto | kilo | mega | giga | tera | peta | exa | zetta | yotta |
|---|
| Prefix symbol | | da | h | k | M | G | T | P | E | Z | Y |
|---|
| Factor | 100 | 101 | 102 | 103 | 106 | 109 | 1012 | 1015 | 1018 | 1021 | 1024 |
Submultiples#
| Prefix name | | deci | centi | milli | micro | nano | pico | femto | atto | zepto | yocto |
|---|
| Prefix symbol | d | c | m | μ | n | p | f | a | z | y |
|---|
| Factor | 100 | 10-1 | 10-2 | 10-3 | 10-6 | 10-9 | 10-12 | 10-15 | 10-18 | 10-21 | 10-24 |
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