AJ vs A9s: Odds & Interactive Calculator
| Hand | Win | Tie | Equity |
|---|---|---|---|
| AJ (Ace-Jack) | 65.4% | 7.4% | 69.1% |
| A9s (Ace-Nine Suited) | 27.2% | 7.4% | 30.9% |
Suited vs offsuit: AJ
| Matchup | Win | Tie | Equity |
|---|---|---|---|
| AJs | 66.5% | 7.1% | 70.1% |
| AJo | 65.1% | 7.5% | 68.8% |
How AJ vs A9s unfolds by street
Ace-Jack (AJ) is still ahead on 82% of flops against A9s, and the lead survives to the turn on 78%. A9s takes the lead on the other 18% of flops. These figures come from full board enumeration, not a simulation.
| Street | AJ still ahead | A9s flipped the lead |
|---|---|---|
| Flop | 82% | 18% |
| Turn | 78% | 22% |
Share a card and you get a kicker problem — that's AJ vs A9s: AJ wins 65.4%, A9s wins 27.2%, and 7.4% of boards chop. Live to only its odd card (plus a thin straight or flush), A9s wins about 1 in 4; the 7.4% tie figure is the tell that these hands are tangled on the same rank.
Think in variance terms: 69.1% equity means AJ loses this all-in nearly 31 times in 100, so even a "dominant" spot is a coin you'll see come up tails plenty. Getting it in as the 69.1% favorite is correct every time; the 30.9% that goes the other way is math, not a misplay.
The lesson of AJ vs A9s is kicker discipline: A9s is the hand that quietly costs people stacks because it's too strong to fold and too dominated to win. If you hold AJ, get value while you're ahead; if you hold the dominated side, this is the exact spot to find a preflop fold against a tight range.
AJ vs A9s FAQ
Who wins AJ vs A9s preflop?
AJ (Ace-Jack) is the favorite, winning 65.4% of all runouts, while A9s (Ace-Nine Suited) wins 27.2%. The remaining 7.4% are split pots. Counting splits as half, AJ's preflop equity is 69.1%.
Does the AJ vs A9s 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: AJ's equity runs from 68.4% to 70.1% depending on suitedness and which suits the two hands share, which is why different sites quote slightly different figures. It does change once board cards are dealt (AJ leads on 82% of flops) and in multiway pots, where every extra caller takes equity from both hands.
Why is A9s so bad against AJ?
Because they share a card, A9s is drawing to roughly three outs and chops 7.4% of the time — it wins only about 1 in 4. That's the danger of a dominated hand: too strong to fold, too far behind to outdraw, which is how kicker problems quietly cost full stacks.
Does AJ hold up against A9s after the flop?
AJ is still ahead on 82% of flops and stays ahead through the turn on 78% of boards; A9s takes the lead on the other 18% of flops. These are exact figures from full board enumeration.
Run any matchup in the free equity calculator · AK VS A2S · AK VS A3S · AK VS A4S · AK VS A5S · AK VS A6S · AK VS A7S
AJ against a range
All-in against one known hand is the textbook case; at the table AJ is usually up against a range. Exact equities, computed over every combo with card removal applied:
- AJ vs calling station — 61.1% against 670 combos (50.5% of hands)
- AJ vs BTN open — 60.2% against 586 combos (44.2% of hands)
- AJ vs CO open — 56.6% against 366 combos (27.6% of hands)
- AJ vs 10bb shove — 56.3% against 334 combos (25.2% of hands)