Help Needed - Option Calculator

I need a software for option calculations. There are many on the net that are free. What I need is specific as follows -

I need it on EXCEL, with specific functions like calculate price, calculate volatility, etc. I DO NOT need input of data from data source. I just want to see, given some particular variables, how other variables change if I change tenure or Strike or Volatility. Anyone know of this one?

The members here have often recommended "Options Oracle". I've never used it, but many members here use it. Hey, VJAY in his thread "Journal for paper traded options" (or something like that) is using Options Oracle.