AJ vs A3s: Preflop Equity & Odds
| Hand | Win | Tie | Equity |
|---|---|---|---|
| AJ (Ace-Jack) | 64.5% | 7.6% | 68.3% |
| A3s (Ace-Three Suited) | 27.9% | 7.6% | 31.7% |
Suited vs offsuit: AJ
| Matchup | Win | Tie | Equity |
|---|---|---|---|
| AJs | 65.6% | 7.4% | 69.3% |
| AJo | 64.1% | 7.7% | 67.9% |
How AJ vs A3s unfolds by street
Ace-Jack (AJ) is still ahead on 81% of flops against A3s, and the lead survives to the turn on 77%. A3s takes the lead on the other 19% of flops. These figures come from full board enumeration, not a simulation.
| Street | AJ still ahead | A3s flipped the lead |
|---|---|---|
| Flop | 81% | 19% |
| Turn | 77% | 23% |
AJ vs A3s is the matchup every "but I had top pair" cooler is made of: AJ wins 64.5%, A3s wins 27.9%, and 7.6% of boards chop. Note the chunky 7.6% 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.
At a final table the raw 68.3% / 31.7% split is only half the story — ICM bends it. As the 31.7% underdog, A3s 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.
The lesson of AJ vs A3s is kicker discipline: A3s 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 A3s FAQ
Who wins AJ vs A3s preflop?
AJ (Ace-Jack) is the favorite, winning 64.5% of all runouts, while A3s (Ace-Three Suited) wins 27.9%. The remaining 7.6% are split pots. Counting splits as half, AJ's preflop equity is 68.3%.
How often does A3s beat AJ?
A3s wins 27.9% 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 A3s so bad against AJ?
Because they share a card, A3s is drawing to roughly three outs and chops 7.6% 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 A3s after the flop?
AJ is still ahead on 81% of flops and stays ahead through the turn on 77% of boards; A3s 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