KK vs 55: Preflop Equity & Odds
| Hand | Win | Tie | Equity |
|---|---|---|---|
| KK (Pocket Kings) | 80.3% | 0.4% | 80.5% |
| 55 (Pocket Fives) | 19.3% | 0.4% | 19.5% |
How KK vs 55 unfolds by street
Pocket Kings (KK) is still ahead on 89% of flops against 55, and the lead survives to the turn on 85%. 55 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 | KK still ahead | 55 flipped the lead |
|---|---|---|
| Flop | 89% | 11% |
| Turn | 85% | 15% |
Set one pocket pair against a bigger one and you get KK vs 55: KK wins 80.3%, 55 wins 19.3%, and 0.4% of boards chop. KK is a 4.2-to-1 favorite. 55 has only two clean outs — the case cards of its own rank — so it must flop or turn a set, or back into a straight or flush, to claim the 19.3% of pots it wins.
Think in variance terms: 80.5% equity means KK loses this all-in nearly 20 times in 100, so even a "dominant" spot is a coin you'll see come up tails plenty. Getting it in as the 80.5% favorite is correct every time; the 19.5% that goes the other way is math, not a misplay.
As the bigger pair, KK, your whole job is to get the money in before a scare card — there's no fold here and slow-playing only lets 55 realize its set equity for free. As the smaller pair, the discipline is recognizing when stacks are deep enough that calling off 19.3% equity is a leak, even though folding pre feels impossible.
KK vs 55 FAQ
Who wins KK vs 55 preflop?
KK (Pocket Kings) is the favorite, winning 80.3% of all runouts, while 55 (Pocket Fives) wins 19.3%. The remaining 0.4% are split pots. Counting splits as half, KK's preflop equity is 80.5%.
How often does 55 beat KK?
55 wins 19.3% of the time all-in preflop against KK — roughly 1 in 5 — so it needs good pot odds or fold equity to get the money in profitably.
Can you fold the smaller pair in KK vs 55?
Almost never preflop all-in — but the 19.3% the smaller pair wins (about 1 in 5) 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 KK hold up against 55 after the flop?
KK is still ahead on 89% of flops and stays ahead through the turn on 85% of boards; 55 takes the lead on the other 11% of flops. These are exact figures from full board enumeration.
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