© Copyright 2008 LMC enterprise

Outs are the number of cards left in the deck that will improve your hand.
Pot odds is the ratio between the call to a bet compared to the size of the pot. 
So, the rules of thumb for calculating the probability of improving your hand using your outs:
  • The probability of hitting a draw on the next card is:
    [number of outs] x 2
  • The probability of hitting a draw on the turn and/or river is:
    [number of outs] x 4
Holdem Math main page. Enter here.