I want to now how to figure my odds of hiting on exactly the turn. Lets pretend like the river does not exist for the time being. sshe gives a simple formula to use when drawing from the turn to the river. it is simply unseen cards/outs-1 For example lets say we have a gs str8 draw on the turn we would say (46/4-1)=10.5 meaning we need 10.5-1 to call I would like a similar formula for going from the flop to the turn.