help! what are pot odds.. and how do I calculate them??

[brikol]

I have heard mentioned many times.. pot odds, actual odds, implied odds, etc... but haven't been able to find a clear cut explanation of exactly what they are and how to calculate them? I understand it has to do with the odds of winning a hand vrs the size of the pot... to determine if the risk of playing is worth the investment in chips called for. But how exactly do I calculate that? Any help would be appreciated.

Thanks! <font color="blue"> </font>