SI Units
1 min read
The International System of Units (SI) is a modern metric system that is widely used in science, technology, and engineering. It was developed to provide a consistent and coherent framework for measuring physical quantities, and it includes seven base units and several derived units.
Base Units:
The seven base units of the SI system are:
Prefixes
The SI system uses prefixes to represent multiples and submultiples of the base units. Here are some common prefixes used in the SI system:
| Prefix | Symbol | Multiple |
|---|---|---|
| atto | a | $10^{-18}$ |
| femto | f | $10^{-15}$ |
| pico | p | $10^{-12}$ |
| nano | n | $10^{-9}$ |
| micro | μ | $10^{-6}$ |
| milli | m | $10^{-3}$ |
| centi | c | $10^{-2}$ |
| deci | d | $10^{-1}$ |
| Base | - | $10^{0}$ |
| deca | da | $10^{1}$ |
| hecto | h | $10^{2}$ |
| kilo | k | $10^{3}$ |
| mega | M | $10^{6}$ |
| giga | G | $10^{9}$ |
| tera | T | $10^{12}$ |
| peta | P | $10^{15}$ |
| exa | E | $10^{18}$ |
| zetta | Z | $10^{21}$ |
Derived Units
Electricity