KK vs AA: Preflop Equity & Odds
| Hand | Win | Tie | Equity |
|---|---|---|---|
| KK (Pocket Kings) | 17.8% | 0.5% | 18.1% |
| AA (Pocket Aces) | 81.7% | 0.5% | 81.9% |
How KK vs AA unfolds by street
Pocket Aces (AA) is still ahead on 89% of flops against KK, and the lead survives to the turn on 86%. KK takes the lead on the other 11% of flops, almost always by flopping a set. These figures come from full board enumeration, not a simulation.
| Street | AA still ahead | KK flipped the lead |
|---|---|---|
| Flop | 89% | 11% |
| Turn | 86% | 14% |
KK vs AA is a pair-over-pair cooler — the kind of all-in nobody at the table can fold. AA wins 81.7%, KK wins 17.8%, and 0.5% of boards chop, a 4.6-to-1 edge for AA. The lower pair, KK, is drawing to the two cards left in the deck that make it a set; miss those and only a runner-runner straight or flush saves it, which is why it gets there just 1 time in 6. It's one of the most-quoted spots in poker, so the exact figure is worth committing to memory.
Think in variance terms: 81.9% equity means AA loses this all-in nearly 18 times in 100, so even a "dominant" spot is a coin you'll see come up tails plenty. Getting it in as the 81.9% favorite is correct every time; the 18.1% that goes the other way is math, not a misplay.
As the bigger pair, AA, your whole job is to get the money in before a scare card — there's no fold here and slow-playing only lets KK realize its set equity for free. As the smaller pair, the discipline is recognizing when stacks are deep enough that calling off 17.8% equity is a leak, even though folding pre feels impossible.
KK vs AA FAQ
Who wins KK vs AA preflop?
AA (Pocket Aces) is the favorite, winning 81.7% of all runouts, while KK (Pocket Kings) wins 17.8%. The remaining 0.5% are split pots. Counting splits as half, KK's preflop equity is 18.1%.
How often does KK beat AA?
KK wins 17.8% of the time all-in preflop against AA — roughly 1 in 6 — so it needs good pot odds or fold equity to get the money in profitably.
Can you fold the smaller pair in KK vs AA?
Almost never preflop all-in — but the 17.8% the smaller pair wins (about 1 in 6) means that when stacks are very deep and the action screams a bigger pair, laying it down is a real, if rare, fold. Set-mining the lower pair works only with the implied odds to win a full stack when you spike.
Does AA hold up against KK after the flop?
AA is still ahead on 89% of flops and stays ahead through the turn on 86% of boards; KK takes the lead on the other 11% of flops. These are exact figures from full board enumeration.
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