This is a discussion on help with odds calculation? within the online poker forums, in the Learning Poker section; Hi guys, i was reviewing the odds part of Harrington's book, but i am having troubles i what i thought i understood about odds calculation. 


#1




help with odds calculation?
Hi guys, i was reviewing the odds part of Harrington's book, but i am having troubles i what i thought i understood about odds calculation. He teaches us that for calculate the hand odds is a formula like [(52X)/X] : 1
Then, right after, talking about small stacks, say that we are about 7,5 : 1 underdog to hit a set on the flop, considering that we hold 33. The formula says that we should be 25 : 1 Where do i mistake? 
#2




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The suggestion is that to call a bet you should be looking at 25/1 effective stacks i.e. if you have 30000 and your opponet has 25000 the effective stack is 25000 if you have to call a raise preflop you should only call about 1K to get near to 25/1. If you have to call 2K you arent getting good enough odds 
#3




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Thank you! 
#4




1  (48/50)*(47/49)*(46/48) is 11.75%
basically you work out odds of not hitting your set 1st card you have 2 cards in your hand 50 left so 48/50 2nd card you have 2 cards 1 has been dealt and 49 left so 47/49 3rd card you have 2 cards 2 have been dealt and 48 left so 46/48 100/11.75 is 1 in 8.5 ot 7.5/1 24/1 or 1 in 25 is the odds to hit on the 1st card dealt 
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#6




re: Poker & help with odds calculation?
your welcome,
sometimes best to just have a chart and see various odds of certain things happening check out thread below for lots more odds and a chart at the bottom http://www.cardschat.com/oddsfordummies.php http://www.cardschat.com/pokeroddspotoddsimpliedodds.php 
#7




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I go read the other, i am sure is super helpful too! Congrats everybody for the super forum! 
#8




I have another question, still reviewing Harrington's book, and i thought maybe i could post here instead of opening a new thread.
It's about the stack to pot ratio, that here is presented as SPR = small stack / pot after preflop action How does this change if i have three different stacks? Example: Me = 120  Opp1 = 80  Opp2 = 25? I presume i calculate it with the medium stack? And if i have 4, still presuming i have the highest stack, i considerate the one just smaller than mine? I am sorry if sometimes my questions are a little dumb i am a beginner, and i have some ideas but i just want to be sure. Thank you cardschat! 
#9




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for holding 33? the mistake comes from there are 3 cards on flop not on cards. that odds calculation is based on one card yet to come. easy way is 1 48/50*47/49*46/48 = 11.76% converted to pot odds =1/7.5 
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#12




re: Poker & help with odds calculation?
I mean I suppose it's useful to know how to work out % of hitting a set on the flop, but really you just need to remember that you will hit approximately every 1 in 8 times and that's close enough

#13




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Anyway, thanks for your explanation! i got a little more, so 8.5 is the total hands that we play considering that we win one, and this is why then we have 7,5 to 1? What i want to try to do is the opposite calculation. I made that calculation, using 1  (48/50)*(47/49)*(46/48) and i got 11.75%. Now how i pass from this to 8.5 played hands? Thank you! 
#16




Perfect! Everything clear! So after i subtract one and i have the effective X : 1 odds, thank you for your explanation! And i will try to ee how works for me with percentages, seems that it needs a passage less in the calculation, so maybe once got accustomed it really is better.
BTW I am staying in England this year, such a beautiful country! Cheers! 