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Earnings per equity share (Tables)
 12 Months Ended
Mar. 31, 2017
Weighted-average number of shares
     As of March 31,  
     2015      2016      2017  

Weighted average number of equity shares used in computing basic earnings per equity share

      2,423,777,245        2,517,429,120        2,544,333,609  

Effect of potential equity shares for stock options outstanding

      23,563,558        27,938,561        31,017,917  
  

 

 

     

 

 

     

 

 

  

Weighted average number of equity shares used in computing diluted earnings per equity share

      2,447,340,803        2,545,367,681        2,575,351,526  
  

 

 

     

 

 

     

 

 

  
Reconciliation of Earnings Per Share

The following are reconciliations of basic and diluted earnings per equity share and earnings per ADS.

 

     Fiscal years ended March 31,  
     2015      2016      2017      2017  

Basic earnings per share

    Rs. 40.94      Rs. 46.84      Rs. 55.23      US$ 0.85  

Effect of potential equity shares for stock options outstanding

      0.39        0.51        0.66        0.01  
  

 

 

     

 

 

     

 

 

     

 

 

  

Diluted earnings per share

    Rs. 40.55      Rs. 46.33      Rs. 54.57      US$ 0.84  
  

 

 

     

 

 

     

 

 

     

 

 

  

Basic earnings per ADS

    Rs. 122.82      Rs. 140.52      Rs. 165.69      US$ 2.55  

Effect of potential equity shares for stock options outstanding

      1.17        1.53        1.98        0.03  
  

 

 

     

 

 

     

 

 

     

 

 

  

Diluted earnings per ADS

    Rs. 121.65      Rs. 138.99      Rs. 163.71      US$ 2.52