Base Units
The set of seven mutually independent fundamental units of measurement defined by the International System of Units.
SI unit
The 7 SI Base Units
In depth
The 7 SI base units are meter (length), kilogram (mass), second (time), ampere (electric current), kelvin (thermodynamic temperature), mole (amount of substance), and candela (luminous intensity). All other physical units are derived from these seven.
Examples in the real world
Combining base units m and s to measure velocity (m/s), or kg, m, and s to express force (kg·m/s² = N).