Name Number is derived from the alphabets of your full birth name. This number is used to find capacities and attitudes in the person’s lifetime that can be further developed for betterment of life. 

How to calculate Name Number
To obtain your Name number, take the sum of each alphabet of your name and add them together. Reduce the total thus obtained into a single digit (1-9). Do not use your nick name or alias names.  
E.g.; The Expression Number of a person named Rohan Arora Ann is calculated the following way.

ROHAN ARORA= 9+6+8+1+5+1+9+6+9+1 = 55 (5+5) =10(1+0)=1.