66 vs 55: Odds & Interactive Calculator
| Hand | Win | Tie | Equity |
|---|---|---|---|
| 66 (Pocket Sixes) | 80.4% | 1.9% | 81.4% |
| 55 (Pocket Fives) | 17.7% | 1.9% | 18.6% |
How 66 vs 55 unfolds by street
Pocket Sixes (66) is still ahead on 89% of flops against 55, and the lead survives to the turn on 86%. 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 | 66 still ahead | 55 flipped the lead |
|---|---|---|
| Flop | 89% | 11% |
| Turn | 86% | 14% |
Set one pocket pair against a bigger one and you get 66 vs 55: 66 wins 80.4%, 55 wins 17.7%, and 1.9% of boards chop. 66 is a 4.5-to-1 favorite. With nothing but the case pair to chase, 55 is set-mining all-in: it wins about 1 in 6, correct to stack off preflop but a hand that hates a clean runout.
At a final table the raw 81.4% / 18.6% split is only half the story — ICM bends it. As the 18.6% underdog, 55 pays an extra survival premium, so the chip-EV "close enough" call can be a clear ICM fold. The pure equity sets the floor; the payout ladder sets the real price.
As the bigger pair, 66, 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 17.7% equity is a leak, even though folding pre feels impossible.
66 vs 55 FAQ
Who wins 66 vs 55 preflop?
66 (Pocket Sixes) is the favorite, winning 80.4% of all runouts, while 55 (Pocket Fives) wins 17.7%. The remaining 1.9% are split pots. Counting splits as half, 66's preflop equity is 81.4%.
Does the 66 vs 55 probability change all-in preflop?
No. Once both hands are all-in preflop the odds are set by the cards alone — position, stack size and who bet first change nothing. The only thing that moves the number is suits: 66's equity runs from 80.7% to 82.0% depending on how many suits the two hands share, which is why different sites quote slightly different figures. It does change once board cards are dealt (66 leads on 89% of flops) and in multiway pots, where every extra caller takes equity from both hands.
Can you fold the smaller pair in 66 vs 55?
Almost never preflop all-in — but the 17.7% 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 66 hold up against 55 after the flop?
66 is still ahead on 89% of flops and stays ahead through the turn on 86% of boards; 55 takes the lead on the other 11% of flops. These are exact figures from full board enumeration.
Run any matchup in the free equity calculator · AA VS TT · AA VS 99 · AA VS 88 · AA VS 77 · AA VS 66 · AA VS 55
See also: hand-vs-range preflop equity — your hand against a real opening, 3-bet, or shove range.