AJ vs A8s: Odds & Interactive Calculator
| Hand | Win | Tie | Equity |
|---|---|---|---|
| AJ (Ace-Jack) | 65.2% | 7.4% | 68.8% |
| A8s (Ace-Eight Suited) | 27.5% | 7.4% | 31.2% |
Suited vs offsuit: AJ
| Matchup | Win | Tie | Equity |
|---|---|---|---|
| AJs | 66.2% | 7.1% | 69.8% |
| AJo | 64.8% | 7.5% | 68.5% |
How AJ vs A8s unfolds by street
Ace-Jack (AJ) is still ahead on 82% of flops against A8s, and the lead survives to the turn on 78%. A8s takes the lead on the other 18% of flops. These figures come from full board enumeration, not a simulation.
| Street | AJ still ahead | A8s flipped the lead |
|---|---|---|
| Flop | 82% | 18% |
| Turn | 78% | 22% |
Share a card and you get a kicker problem — that's AJ vs A8s: AJ wins 65.2%, A8s wins 27.5%, and 7.4% of boards chop. With the shared rank gutting its outs, A8s is a 2.4-to-1 underdog, and 7.4% of runouts split outright when both play the common card.
Here's the intuition behind 68.8% to 31.2%: AJ wins roughly 2 of every 3 times the chips go in, but the underdog cashing 31.2% of the time is exactly why you can't slow-play and let it draw for free.
Domination is where preflop hand-reading pays off. With AJ you want stacks in; with A8s you want out, because three outs and a prayer is not a stack-off — recognizing that you're crushed against a strong range is worth more than any postflop move.
AJ vs A8s FAQ
Who wins AJ vs A8s preflop?
AJ (Ace-Jack) is the favorite, winning 65.2% of all runouts, while A8s (Ace-Eight Suited) wins 27.5%. The remaining 7.4% are split pots. Counting splits as half, AJ's preflop equity is 68.8%.
Does the AJ vs A8s 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 68.1% to 69.8% 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 A8s so bad against AJ?
Because they share a card, A8s 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 A8s after the flop?
AJ is still ahead on 82% of flops and stays ahead through the turn on 78% of boards; A8s 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)