JJ vs AJ: Preflop Equity & Odds
| Hand | Win | Tie | Equity |
|---|---|---|---|
| JJ (Pocket Jacks) | 67.6% | 1.7% | 68.4% |
| AJ (Ace-Jack) | 30.7% | 1.7% | 31.6% |
Suited vs offsuit: AJ
| Matchup | Win | Tie | Equity |
|---|---|---|---|
| AJs | 33.8% | 1.7% | 34.7% |
| AJo | 29.7% | 1.7% | 30.6% |
JJ against AJ is a card-removal matchup: the pair holds one of the cards the other hand needs. JJ wins 67.6%, AJ wins 30.7%, and 1.7% of boards chop. Because the pair blocks the unpaired hand's outs (and vice versa), the favorite here is bigger than in a clean race — this is among the most common all-in confrontations in real games.
In equity terms — your long-run share of the pot counting split pots as half — JJ holds 68.4% and AJ holds 31.6%. To make these numbers practical: facing a pot-sized all-in you need about 33% equity to call profitably, and a half-pot bet needs about 25%. Numbers on this page are exact, computed by full board enumeration (not simulation). Try any other hand or full ranges in the free equity calculator.
JJ vs AJ FAQ
Who wins JJ vs AJ preflop?
JJ (Pocket Jacks) is the favorite: it wins 67.6% of all runouts, while AJ (Ace-Jack) wins 30.7%. The remaining 1.7% are split pots. Counting splits as half, JJ's preflop equity is 68.4%.
How often does AJ beat JJ?
AJ wins 30.7% of the time all-in preflop against JJ — a genuine underdog, but with enough live outs that the matchup is closer than the favorite would like.
Are these JJ vs AJ numbers exact?
Yes. They are computed by exhaustively enumerating every possible five-card board (1,712,304 boards per card combination) and averaging across all suit combinations of both hands — not by Monte Carlo simulation. Display values are rounded to one decimal place.
Run any matchup in the free equity calculator · KK VS AK · QQ VS AQ · QQ VS KQ