As I recall, PT3 does not have an odds calculator. You will find that many software vendors charge almost as much for their odds calculator as you paid for PT3, which is why not too many people like them. Not only that, but there are those who will point out that you should learn the odds yourself. There are websites, but that requires switching back and forth between your poker room and your web browser for every hand you want to be involved in - not likely to be something you would want to do, based on your comment about getting everything to fit on one screen.
Now, having said all that, there is an odds calculator I use which may meet your requirements. It is the Pokernews.com Odds Calculator Desktop Application
, and it does not appear to take up an unreasonable amount of screen real eastate. It is free, and does not require signing up to a web site or poker room. While I do not use this while playing (maybe I should !), it will definitely do what you want it to. Even if it is too cumbersome to use while you play, you can always review your session with it by marking questionable hands for review in PT3, then going over those hands in Odds Calculator. Believe me, you will find out very quickly if you made a mistake, or if the other guy simply got lucky.
Good luck on the felt !