99 vs 66: Odds & Interactive Calculator
| Hand | Win | Tie | Equity |
|---|---|---|---|
| 99 (Pocket Nines) | 80.9% | 0.6% | 81.2% |
| 66 (Pocket Sixes) | 18.5% | 0.6% | 18.8% |
How 99 vs 66 unfolds by street
Pocket Nines (99) is still ahead on 89% of flops against 66, and the lead survives to the turn on 85%. 66 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 | 99 still ahead | 66 flipped the lead |
|---|---|---|
| Flop | 89% | 11% |
| Turn | 85% | 15% |
Set one pocket pair against a bigger one and you get 99 vs 66: 99 wins 80.9%, 66 wins 18.5%, and 0.6% of boards chop. 99 is a 4.4-to-1 favorite. The lower pair, 66, 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 5.
At a final table the raw 81.2% / 18.8% split is only half the story — ICM bends it. As the 18.8% underdog, 66 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, 99, your whole job is to get the money in before a scare card — there's no fold here and slow-playing only lets 66 realize its set equity for free. As the smaller pair, the discipline is recognizing when stacks are deep enough that calling off 18.5% equity is a leak, even though folding pre feels impossible.
99 vs 66 FAQ
Who wins 99 vs 66 preflop?
99 (Pocket Nines) is the favorite, winning 80.9% of all runouts, while 66 (Pocket Sixes) wins 18.5%. The remaining 0.6% are split pots. Counting splits as half, 99's preflop equity is 81.2%.
Does the 99 vs 66 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: 99's equity runs from 80.5% to 81.9% 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 (99 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 99 vs 66?
Almost never preflop all-in — but the 18.5% 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 99 hold up against 66 after the flop?
99 is still ahead on 89% of flops and stays ahead through the turn on 85% of boards; 66 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
99 against a range
All-in against one known hand is the textbook case; at the table 99 is usually up against a range. Exact equities, computed over every combo with card removal applied:
- 99 vs calling station — 64.9% against 670 combos (50.5% of hands)
- 99 vs BTN open — 64.0% against 586 combos (44.2% of hands)
- 99 vs CO open — 60.4% against 366 combos (27.6% of hands)
- 99 vs 10bb shove — 60.4% against 334 combos (25.2% of hands)