How to work out your odds in online poker
On the Flop
Picture yourself in this situation. The flop has just been dealt and you have nothing. Your opponent raises half the pot, do you play or do you fold?
After studying the cards on the table you realize there is actually 21 unseen cards which would give you a hand and there are 2 cards left to be turned over. Any queen or jack would give you top pair. Any king or eight would give you the straight and any heart would give you the flush.
To work out what the chance of one of those cards appearing on the turn or river you must multiply the amount of cards which would give you a hand by 4.
So in this case, 21 x 4 = 84% You have an 84% chance of making a hand by the River.
On the turn
After the turn, none of the cards you was hoping for have appeared which has affected your odds of getting a hand by the river.
To work out your chance of getting a hand at this point you must multiply the amount of cards that would give you a hand by 2.
So in this case, 21 x 2 = 42% You have a 42% chance of making a hand on the river.
This is only a guide to help you work out the odds of making a hand, not a winning hand. A queen may appear on the river giving you the top pair but he may be hiding double aces, or even a 9 and a 10, all beating your pair of queens.
When you become more experienced you can make an educated guess as to what your opponent may have and then you can use this method to work out the odds of beating him.