AK vs JJ: Preflop Equity & Odds
| Hand | Win | Tie | Equity |
|---|---|---|---|
| AK (Ace-King) | 43.6% | 0.4% | 43.9% |
| JJ (Pocket Jacks) | 55.9% | 0.4% | 56.1% |
Suited vs offsuit: AK
| Matchup | Win | Tie | Equity |
|---|---|---|---|
| AKs | 45.8% | 0.4% | 46.0% |
| AKo | 42.9% | 0.4% | 43.1% |
How AK vs JJ unfolds by street
Pocket Jacks (JJ) is still ahead on 67% of flops against AK, and the lead survives to the turn on 62%. AK takes the lead on the other 33% of flops. These figures come from full board enumeration, not a simulation.
| Street | JJ still ahead | AK flipped the lead |
|---|---|---|
| Flop | 67% | 33% |
| Turn | 62% | 38% |
When a pair meets two bigger cards you get a flip, and AK vs JJ is exactly that: JJ wins 55.9%, AK wins 43.6%, and 0.4% of boards chop. The overcards lean on six live outs — either Jack or Jack pairs to take the lead — which is why the unpaired side converts about 55.9%, the math behind every "I have to gamble" all-in in a tournament. It's a benchmark spot every serious player should know cold.
Think in variance terms: 56.1% equity means JJ loses this all-in nearly 44 times in 100, so even a "dominant" spot is a coin you'll see come up tails plenty. Getting it in as the 56.1% favorite is correct every time; the 43.9% that goes the other way is math, not a misplay.
In practice, AK vs JJ rewards aggression from the favorite and caution from the dog: JJ wants to realize its 55.9% edge by getting value and denying free cards, while AK should lean on fold equity and position rather than hoping to win the pot at showdown about 1 time in 2.
AK vs JJ FAQ
Who wins AK vs JJ preflop?
JJ (Pocket Jacks) is the favorite, winning 55.9% of all runouts, while AK (Ace-King) wins 43.6%. The remaining 0.4% are split pots. Counting splits as half, AK's preflop equity is 43.9%.
Does the AK vs JJ 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: AK's equity runs from 42.7% to 46.1% 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 (JJ leads on 67% of flops) and in multiway pots, where every extra caller takes equity from both hands.
Is JJ vs AK a good spot to get all-in?
For JJ, yes — a 56.1% favorite should happily commit, especially with fold equity. For AK at 43.9%, it depends on the price: enough to continue with initiative, but thin enough that stacking off out of position is usually a leak.
Does JJ hold up against AK after the flop?
JJ is still ahead on 67% of flops and stays ahead through the turn on 62% of boards; AK takes the lead on the other 33% of flops. These are exact figures from full board enumeration.
Run any matchup in the free equity calculator · AA VS KK · KK VS AA · AA VS AK · AK VS AA · KK VS AK · AK VS KK
AK against a range
All-in against one known hand is the textbook case; at the table AK is usually up against a range. Exact equities, computed over every combo with card removal applied:
- AK vs calling station — 64.5% against 670 combos (50.5% of hands)
- AK vs BTN open — 64.0% against 586 combos (44.2% of hands)
- AK vs SB open — 64.0% against 534 combos (40.3% of hands)
- AK vs CO open — 61.7% against 366 combos (27.6% of hands)