For everyone who wants to know exactly how to calculate
the odds for hitting a card
on turn or river can read below how it works. Calculating odds and outs is a
very important factor in Texas
Hold 'em.
The chances of hitting your flush or straight on the turn, or what
the chances are of getting an overcard on the flop, the number of times you're
going to flop a set with your pocket pair, are all very important factors to know
in Texas Hold'em.
Knowing these statistics is crucial for becoming a good an winning poker player.
I will
give a short explanation of some terms you will read in this article.
Outs: The number of cards left in the deck that improve your
hand.
Pot odds: The odds you are getting when comparing the current size of
the pot versus your next call.
Implied odds: The odds you get after the assumed result of betting for the
next rounds of betting.
If you make it to the flop with a number of outs, you
will have to calculate what
your chances are of hitting one of those outs on turn or river.
Let's say you hold 
and the flop comes 
You have a flushdraw and it gives you nine outs for hitting the flush on turn and
river.
If you want to know exactly what the chances are for a heart on the turn you divide
the number of outs by the 47 unseen cards and multiply it with 100%.
For our flushdraw we have a chance of
9 / 47 * 100% = 19.95% of catching a heart
on the turn. To calculate the probability of catching a heart on turn and river
together you will have to calculate the chance that none of your outs will apear
on turn or river.
With nine outs on the flop you have a 38 / 47 * 37/46 * 100% = 65,03% chance of
not catching one of your nine outs. This means you have a chance of 1 - 65.03% = 35%
to hit one of your outs on turn or river.
