Physical quantity | Symbol | Name of SI base unit | Symbol for SI unit |
---|---|---|---|
length | l | metre | m |
mass | m | kilogram | kg |
time | t | second | s |
electric current | I | ampere | A |
thermodynamic temperature | T | kelvin | K |
amount of substance | n | mole | mol |
luminous intensity | Iv | candela | cd |
All other physical units can be derived from these seven SI base units.
The SI prefixes are applied to abbreviate long numbers.