AJ vs A8s: Preflop Equity & Odds
| 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%.
How often does A8s beat AJ?
A8s wins 27.5% of the time all-in preflop against AJ — roughly 1 in 4 — so it needs good pot odds or fold equity to get the money in profitably.
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