SI Units chart, SI system of units, seven SI units, SI unit prefixes

SI Units

SI unit is the abbreviation for System International de units and is the modern form of metric system finally agreed upon at the eleventh International conference of weights and measures, 1960. This system of units is now being adopted throughout the world and will remain the primary system of units of measurement. SI system possesses features that make it logically superior to any other system.

There are seven fundamental units (base units) and two supplementary units.

SI system of units

Physical quantity	Unit	Symbol
Fundamental quantities
1.Length	metre	m
2.Mass	kilogram	kg
3.Time	second	s
4.Electric current	ampere	A

5.Temperature	kelvin	K
6.Luminous Intensity	candela	cd
7.Amount of substance	mole	mol
Supplementary quantities
1. Plane angle	radian	rad
2. Solid angle	steradian	sr

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