This is a discussion on Counting and calculating outs within the online poker forums, in the Learning Poker section; Hi All! When calculating outs and basically calculating the probability that I’ll hit one of the cards that I need on the turn or the river, 

Counting and calculating outs 
#1




Counting and calculating outs
Hi All!
When calculating outs and basically calculating the probability that I’ll hit one of the cards that I need on the turn or the river, I’m wondering how many cards are in the denominator? Is it 52? Or is it 52 minus the two cards in my hand minus the amount of cards in everyone else’s hand’s? So let’s say I have 7 “outs”. Do I divide 7 by 52 or by, like I mentioned above, the adjusted number? I’m assuming they just divide it by the full deck number, but wouldn’t it make more sense to adjust? Thanks!! Mark
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#2




Cardschat has written a great guide about this: https://www.cardschat.com/oddsfordummies.php Scroll down to part 2 and you'll learn how to calculate outs and adds.
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#3




Okay. Thank you very much!
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#4




re: Poker & Counting and calculating outs
cards in deck  known cards = remaining unknown cards
outs/remaining unknown cards = odds of hitting. you can also do the rule of 2 and 4, which is a quick calculation for figuring out the odds of you hitting on each street or the odds of hitting on either street.
going slightly further, the rule of 2 and 4 is very close but not exactly perfect. if you aren't a stickler for being exact, as long as you're over the pot odds with the hand odds (using percentage method), then you'll be fine.
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#5




For example, at the flop, the denominator would be 47 since you know 5 of the 52 cards. Nice question, this is an important topic
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#6




So what I've always wondered about the rule of 2 and 4, is that it seems that the examples that are used when explaining it are for example a flush draw. So that would mean you have 9 outs. 9*4 or 9*2 is 36% or 18%. But here's where I'm confused when it comes to calculating equity of other hands other than like flush or straight draws. Can I use the rule of 4 and 2 for things like just having a pair? So if I have a pair of 9s, that means I only have 2 outs, right? The 2 other 9s in the deck. So then my equity would only be 2*4 and 2*2 = 8 and 4%? Or are you only supposed to use the rule of 4 and 2 for hands that would lead you to definitely winning the pot in the showdown? Like, **could I use the rule of 4 and 2 if I just have 2 random cards? Say 9 and 4?** Thanks again for your time!!!
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#7




Dude, thank you so much. Got it! Very helpful!
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#8




re: Poker & Counting and calculating outs
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#9




Thank you so much. This totally cleared it up for me. Especially the idea that yes, I can use the rule of 4 and 2 for a random hand like 7c3d, but I would have to take into account how the board looks/my likelihood of winning/the players that I'm playing against etc. It's cool to know that I can still use the rule though to calculate my chances of hitting with even random pairs! Awesome!
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