--- title: "KJs vs J9s: preflop equity" url: "https://georgelipoker.com/equity/kjs-vs-j9s.md" canonical_url: "https://georgelipoker.com/equity/kjs-vs-j9s" last_updated: "2026-10-23" type: "reference" summary: "KJs is a big favorite over J9s before the flop: 69.82% to 30.18% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/kjs-vs-jto.md", "https://georgelipoker.com/equity/kjs-vs-t9s.md", "https://georgelipoker.com/equity/a8s-vs-j9s.md"] --- # KJs vs J9s: preflop equity KJs is a big favorite over J9s before the flop: 69.82% to 30.18% equity, counted exactly over every board, with the split by flop type and suit. Dealt all in against each other, KJs takes 69.82% of the pot on average and J9s takes the other 30.18%. ## KJs against J9s: the numbers **Exact preflop results for KJs against J9s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | KJs | 68.445 | 2.742 | 28.813 | 69.816 | | J9s | 28.813 | 2.742 | 68.445 | 30.184 | Two suited hands meet here: KJs against J9s. Because the hands share one rank, the one with the higher kicker is ahead when that rank pairs and the other hand is mostly drawing. KJs is well ahead, and J9s needs a specific kind of board to catch up. About 2.74% of boards chop the pot, which is why equity sits slightly above the win figure for both hands. The hand ranking puts KJs at 20 and J9s at 55 out of 169 starting hands. **Boards behind the percentages: 20,547,648 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | KJs | 14,064,000 | 563,000 | 5,920,000 | | J9s | 5,920,000 | 563,000 | 14,064,000 | Exact total: 12 deals times 1,712,304 boards. The other three counts come from the five-decimal percentages and are rounded to the nearest thousand, so read them as approximate. **KJs against J9s read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | KJs | 2.313 | 1.461 | 3.471 | 0.432 | | J9s | 0.432 | 3.471 | 1.461 | 2.313 | The last column is the break-even price: the pot odds a call needs to offer, as a ratio of pot to call. ## Who is ahead on which flops Rainbow flops topped by a ten or better are the best for KJs (74.42%); low rainbow flops (nine high or lower) are the worst (60.08%). KJs stays ahead on all five textures. **KJs against J9s by flop texture, in percent** | Flop | Share of flops | KJs wins | Ties | J9s wins | KJs equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.867 | 73.100 | 2.649 | 24.251 | 74.424 | | Rainbow, nine or lower | 7.042 | 59.351 | 1.455 | 39.194 | 60.078 | | Two-tone | 46.543 | 67.433 | 2.146 | 30.421 | 68.506 | | Monotone | 5.215 | 60.893 | 4.596 | 34.511 | 63.191 | | Paired | 17.333 | 70.719 | 4.436 | 24.845 | 72.937 | A rainbow flop shows three suits, a two-tone flop repeats one suit, a monotone flop is a single suit, and a paired flop repeats a rank. ## Compared with a random hand A random hand would give KJs 62.57% and J9s 55.66%. Against each other the change is +7.25 points for KJs and -25.48 for J9s. **KJs and J9s here compared with each against a random hand, in percent** | Case | Equity here | Against a random hand | Change in points | Times the random-hand equity | | --- | --- | --- | --- | --- | | KJs, all flops | 69.816 | 62.567 | +7.249 | 1.11586 | | KJs, rainbow, ten or higher | 74.424 | 62.567 | +11.857 | 1.18951 | | KJs, rainbow, nine or lower | 60.078 | 62.567 | -2.489 | 0.96022 | | KJs, two-tone | 68.506 | 62.567 | +5.939 | 1.09492 | | KJs, monotone | 63.191 | 62.567 | +0.624 | 1.00997 | | KJs, paired | 72.937 | 62.567 | +10.370 | 1.16574 | | J9s, all flops | 30.184 | 55.662 | -25.478 | 0.54227 | | J9s, rainbow, ten or higher | 25.576 | 55.662 | -30.086 | 0.45949 | | J9s, rainbow, nine or lower | 39.922 | 55.662 | -15.740 | 0.71722 | | J9s, two-tone | 31.494 | 55.662 | -24.168 | 0.56581 | | J9s, monotone | 36.809 | 55.662 | -18.853 | 0.66129 | | J9s, paired | 27.063 | 55.662 | -28.599 | 0.48620 | ## Does a shared suit matter? KJs and J9s never overlap in suit in a legal deal, so the whole matchup sits in the no-shared-suit row. **KJs against J9s by suit overlap, in percent** | Deals | Specific deals | Share of deals | KJs wins | Ties | J9s wins | KJs equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 0 | 0.00 | not possible | not possible | not possible | not possible | | No shared suit | 12 | 100.00 | 68.445 | 2.742 | 28.813 | 69.816 | ## How often this matchup comes up KJs against J9s is made up of 12 specific-card matchups in one seat order, 0.0007% of the 1,624,350 ordered deals, and 24 counting both seat orders, 0.0015%. ## A worked example Worked example: both players commit $100, so $200 sits in the middle. Over every board, KJs' average share is $139.64 (a gain of $39.64) and J9s' is $60.36 (a loss of $39.64). Think in thousands: about 685 of 1,000 go to KJs, about 288 go to J9s, and about 27 are chopped. ## The same matchup from the other side Swap the hands and you get J9s with 30.18% against KJs with 69.82%. We keep one page per matchup, with the better-ranked hand first. ## Keep exploring Try KsJs against Jh9h in the calculator: the hands share no suit, and every card can be changed. The links after it are the closest matchups in the ranking. - [Open KsJs against Jh9h in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=KsJs&p2=Jh9h) - [KJs combos](https://georgelipoker.com/combos/kjs.md) - [J9s combos](https://georgelipoker.com/combos/j9s.md) - [KJs vs JTo](https://georgelipoker.com/equity/kjs-vs-jto.md) - [KJs vs T9s](https://georgelipoker.com/equity/kjs-vs-t9s.md) - [A8s vs J9s](https://georgelipoker.com/equity/a8s-vs-j9s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Method: exact enumeration. The 12 specific deals are grouped by suit pattern, each is run against all 1,712,304 boards, and both seven-card hands are scored. Equity adds half of every tie, and flop textures are tallied over the ten flops inside each board. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [KJs vs JTo: preflop equity](https://georgelipoker.com/equity/kjs-vs-jto.md) - [KJs vs T9s: preflop equity](https://georgelipoker.com/equity/kjs-vs-t9s.md) - [A8s vs J9s: preflop equity](https://georgelipoker.com/equity/a8s-vs-j9s.md)