Nifty options fair value by Black and Scholes method

[bhallaji]

Hi,

Can someone guide me on how to calculate the fair value of Nifty options using the Black and Scholes method? I found an online calculator but I am not sure what values to enter for the volatility(%) and the time(whether the actual days to end or the trading days). This is only a part of my learning and may or may not help me out in trading.

regards
bhalla

 

[seetharamank]

volatility will be annual volatility in percentage u can get it from NSE web site& no of days no of trading days left over to expiry