ISO Units
ISO Units
Note:The fundamental units according to BS 5775-0:1993, ISO 31-0:1992 include length, mass, time, electric current, thermodynamic temperature, amount of substance and luminous intensity.
In mechanical engineering the fundamental required units are length, mass and time
| Physical Unit | Name | Symbol |
| length | metre | m |
| mass | kilogram | kg |
| time | second | s |
| electric current | ampere | A |
| temperature | kelvin | K |
| luminous intensity | candela | cd |
| *plane angle | radian | rad |
| *solid angle | steradian | sr |
| Quantity of Matter | mole | mole |