International system of units

Measuring is not simply counting. For example, if we need milk or sugar, we must also understand how much quantity of milk or sugar we are talking about. Thus, there is a need of some standard quantities   for measuring\comparing unknown quantities. Once a standard is set for a quantity then it can be expressed in terms of that standard quantity. This standard quantity is called a unit.

       With the developments in the field of science and technology, the need for a commonly acceptable system of unit was seriously felt all over the world particularly to exchange scientific and technical information. The eleventh general conference on weight and measures held in Paris in 1960 adopted a word-wide system of measurements called international system of unit. The international system of unit is commonly referred as SI.

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