Guides
One question per guide, answered with odds computed by code. New guides are added regularly.
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Poker odds chart
The cheat sheet: outs, draws, starting hands, flops and matchups.
Outs and the rule of 2 and 4
Counting outs, and how far the shortcut is off.
Pot odds explained
The price of a call, with examples and bet sizes.
Implied odds
When a call that loses on pot odds can still pay.
Starting hand odds
Aces once in 221 hands, and what each hand makes by the river.
Flop odds
Sets, pairs and flush draws, over all 19,600 flops.
All-in matchups
AA against KK, the coin flip, domination.
Hand probabilities
How often each hand comes up with seven cards and with five.
KK vs AQs: all-in odds before the flop
King pair holds a clear edge over ace-queen suited all-in before the flop, winning roughly two-thirds of boards.
How often does a set improve to a full house?
A set improves to a full house by the river more often than a simple seven-out count suggests, due to conditional probabilities on later streets.
AKo vs JTs: all-in odds before the flop
Ace King offsuit holds a mathematical edge over Jack Ten suited in all-in situations, winning more often than the underdog despite suited advantages.
Two overcards: the odds of pairing one
Compare exact two-overcard hit rates with the rule of four and pot odds to determine if a call is mathematically justified.
Straight flush odds in Texas Hold'em
Compare straight flush probabilities in Hold'em versus five-card poker and understand their rarity in hand rankings.
What are the odds of being dealt ace-king?
Ace-king appears in roughly one of eighty hands, with suited versions being rarer. Pairing chances rise significantly by the river.
AA vs 87s: all-in odds before the flop
Ace pair holds a strong edge over suited connectors before the flop, winning most boards while the underdog relies on specific hits.
Flush and straight draw odds: the combo draw
Compare exact flush and straight draw odds against the rule of two and four to determine if calling specific bet sizes is mathematically justified.
Full house odds in Texas Hold'em
Compare full house frequencies in Texas Hold'em versus five-card poker, explaining how extra cards increase the likelihood of forming this specific hand ranking.
How often do you get a pocket pair?
Pocket pairs appear in roughly one in seventeen hands, with specific odds for matching ranks and improving on the board.
22 vs AKo: all-in odds before the flop
A precise analysis of the mathematical edge held by pocket twos against ace-king suited before the flop in Texas Hold'em.
Gutshot straight draw odds
Learn the precise odds for gutshot straight draws, comparing exact calculations with the rule of two and four for better decision-making.
How often do suited cards make a flush?
Suited cards rarely make a flush immediately, but they offer frequent draws that improve by the river more often than immediate hits.
AKo vs AQo: all-in odds before the flop
Ace-King holds a clear edge over Ace-Queen when all-in before the flop, with suits influencing split pots slightly.
Open-ended straight draw odds
Learn the precise odds for completing an open-ended straight draw on the turn or river, and how to compare them against pot odds.
How rare is a royal flush in Texas Hold'em?
A royal flush appears far more often in Texas Hold'em than in five-card poker, though it remains a rare event for most players.
What are the odds of flopping a set?
Learn the precise probability of flopping a set with a pocket pair, how it compares to other hand strengths, and what this means for calling raises.
KK vs QQ: all-in odds before the flop
King of clubs paired with king of diamonds holds a clear edge over queen of hearts paired with queen of spades when all-in before the flop.
Flush draw odds: turn, river and both
Learn the precise odds for completing a flush draw on the turn, river, or both, and compare them to quick estimation rules.
How often do you get pocket aces?
Pocket aces appear rarely, about once every two hundred hands. Learn how to interpret these odds over short and long sessions.
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