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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