AJ vs A2s: Preflop Equity & Odds
| Hand | Win | Tie | Equity |
|---|---|---|---|
| AJ (Ace-Jack) | 64.9% | 7.7% | 68.7% |
| A2s (Ace-Deuce Suited) | 27.4% | 7.7% | 31.3% |
Suited vs offsuit: AJ
| Matchup | Win | Tie | Equity |
|---|---|---|---|
| AJs | 66.0% | 7.4% | 69.7% |
| AJo | 64.5% | 7.8% | 68.4% |
How AJ vs A2s unfolds by street
Ace-Jack (AJ) is still ahead on 81% of flops against A2s, and the lead survives to the turn on 77%. A2s takes the lead on the other 19% of flops. These figures come from full board enumeration, not a simulation.
| Street | AJ still ahead | A2s flipped the lead |
|---|---|---|
| Flop | 81% | 19% |
| Turn | 77% | 23% |
AJ vs A2s is the matchup every "but I had top pair" cooler is made of: AJ wins 64.9%, A2s wins 27.4%, and 7.7% of boards chop. Note the chunky 7.7% chop rate — it surfaces whenever the shared rank plays and the kickers don't. Spots like this are where stacks quietly disappear: the dominated hand can't fold pre and can't outrun the kicker post.
Translate that into a decision and it's simple pot-odds math: counting split pots as half, AJ carries 68.7% equity and A2s 31.3%. Against a pot-sized shove you need about 33% to call and about 25% versus a half-pot bet — so A2s needs real fold equity, not just its raw share, to justify stacking off.
Domination is where preflop hand-reading pays off. With AJ you want stacks in; with A2s 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 A2s FAQ
Who wins AJ vs A2s preflop?
AJ (Ace-Jack) is the favorite, winning 64.9% of all runouts, while A2s (Ace-Deuce Suited) wins 27.4%. The remaining 7.7% are split pots. Counting splits as half, AJ's preflop equity is 68.7%.
How often does A2s beat AJ?
A2s wins 27.4% 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 A2s so bad against AJ?
Because they share a card, A2s is drawing to roughly three outs and chops 7.7% 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 A2s after the flop?
AJ is still ahead on 81% of flops and stays ahead through the turn on 77% of boards; A2s takes the lead on the other 19% 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