KJ vs K8s: Odds & Interactive Calculator
| Hand | Win | Tie | Equity |
|---|---|---|---|
| KJ (King-Jack) | 65.6% | 7.3% | 69.2% |
| K8s (King-Eight Suited) | 27.1% | 7.3% | 30.8% |
Suited vs offsuit: KJ
| Matchup | Win | Tie | Equity |
|---|---|---|---|
| KJs | 66.7% | 7.0% | 70.2% |
| KJo | 65.2% | 7.3% | 68.9% |
How KJ vs K8s unfolds by street
King-Jack (KJ) is still ahead on 82% of flops against K8s, and the lead survives to the turn on 78%. K8s takes the lead on the other 18% of flops. These figures come from full board enumeration, not a simulation.
| Street | KJ still ahead | K8s flipped the lead |
|---|---|---|
| Flop | 82% | 18% |
| Turn | 78% | 22% |
KJ vs K8s is the matchup every "but I had top pair" cooler is made of: KJ wins 65.6%, K8s wins 27.1%, and 7.3% of boards chop. Note the chunky 7.3% 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.
Here's the intuition behind 69.2% to 30.8%: KJ wins roughly 2 of every 3 times the chips go in, but the underdog cashing 30.8% 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 KJ you want stacks in; with K8s 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.
KJ vs K8s FAQ
Who wins KJ vs K8s preflop?
KJ (King-Jack) is the favorite, winning 65.6% of all runouts, while K8s (King-Eight Suited) wins 27.1%. The remaining 7.3% are split pots. Counting splits as half, KJ's preflop equity is 69.2%.
Does the KJ vs K8s 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: KJ's equity runs from 68.5% to 70.2% 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 (KJ leads on 82% of flops) and in multiway pots, where every extra caller takes equity from both hands.
Why is K8s so bad against KJ?
Because they share a card, K8s is drawing to roughly three outs and chops 7.3% 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 KJ hold up against K8s after the flop?
KJ is still ahead on 82% of flops and stays ahead through the turn on 78% of boards; K8s 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
See also: hand-vs-range preflop equity — your hand against a real opening, 3-bet, or shove range.