There are seven base SI units; all other units are derived from these:
| Base Quantity | Symbol> | Name | Symbol |
|---|---|---|---|
| length | l | meter | m |
| mass | m | kilogram | kg |
| time | t | second | s |
| electric current | I | ampere | A |
| thermodynamic temperature | T | kelvin | K |
| amount of substance | lv | mole | mol |
| luminous intensity | n | candela | cd |