--- title: "A9s vs KJo: preflop equity" url: "https://georgelipoker.com/equity/a9s-vs-kjo.md" canonical_url: "https://georgelipoker.com/equity/a9s-vs-kjo" last_updated: "2026-10-23" type: "reference" summary: "A9s is a big favorite over KJo before the flop: 60.20% to 39.80% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/a9s-vs-55.md", "https://georgelipoker.com/equity/a9s-vs-qjs.md", "https://georgelipoker.com/equity/ato-vs-kjo.md"] --- # A9s vs KJo: preflop equity A9s is a big favorite over KJo before the flop: 60.20% to 39.80% equity, counted exactly over every board, with the split by flop type and suit. Over all 1,712,304 boards that can follow this deal, A9s finishes with 60.20% of the pot and KJo with 39.80%. ## A9s against KJo: the numbers **Exact preflop results for A9s against KJo, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | A9s | 59.968 | 0.459 | 39.573 | 60.198 | | KJo | 39.573 | 0.459 | 59.968 | 39.802 | The matchup pits a suited hand against an offsuit hand. With no overlap in ranks, every card that pairs one hand is a card that does not pair the other. A 20.40 point lead is real, and KJo still takes about 396 of every 1,000 deals outright. A split pot comes up on 0.46% of boards, so the wins and the equity differ by half of that. A9s ranks number 18 of 169 starting hands, and KJo ranks number 26, by equity against a random hand. **Boards behind the percentages: 82,190,592 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | A9s | 49,288,000 | 377,000 | 32,525,000 | | KJo | 32,525,000 | 377,000 | 49,288,000 | The total is exact: 48 specific deals times 1,712,304 boards. The three counts are approximate, worked out from the percentages to five decimals and rounded to the nearest thousand. **A9s against KJo read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | A9s | 1.512 | 1.668 | 2.527 | 0.661 | | KJo | 0.661 | 2.527 | 1.668 | 1.512 | The final column gives the least the pot must offer for each unit called for a call to break even at this equity. ## Who is ahead on which flops A9s prefers low rainbow flops (nine high or lower), where it holds 76.98%, and likes rainbow flops topped by a ten or better least, where it holds 52.87%. A9s stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **A9s against KJo by flop texture, in percent** | Flop | Share of flops | A9s wins | Ties | KJo wins | A9s equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.988 | 52.810 | 0.125 | 47.065 | 52.873 | | Rainbow, nine or lower | 7.042 | 76.505 | 0.953 | 22.542 | 76.982 | | Two-tone | 46.667 | 59.710 | 0.286 | 40.004 | 59.853 | | Monotone | 5.212 | 55.452 | 2.378 | 42.170 | 56.641 | | Paired | 17.091 | 65.284 | 0.612 | 34.104 | 65.590 | Rainbow flops have three suits, two-tone flops repeat one suit, monotone flops are all one suit, and paired flops repeat a rank. ## Compared with a random hand Compared with a random opponent, this matchup shifts A9s from 62.78% by -2.58 points and KJo from 60.57% by -20.77 points. **A9s and KJo 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 | | --- | --- | --- | --- | --- | | A9s, all flops | 60.198 | 62.781 | -2.583 | 0.95886 | | A9s, rainbow, ten or higher | 52.873 | 62.781 | -9.908 | 0.84218 | | A9s, rainbow, nine or lower | 76.982 | 62.781 | +14.201 | 1.22620 | | A9s, two-tone | 59.853 | 62.781 | -2.928 | 0.95336 | | A9s, monotone | 56.641 | 62.781 | -6.140 | 0.90220 | | A9s, paired | 65.590 | 62.781 | +2.809 | 1.04474 | | KJo, all flops | 39.802 | 60.569 | -20.767 | 0.65713 | | KJo, rainbow, ten or higher | 47.127 | 60.569 | -13.442 | 0.77807 | | KJo, rainbow, nine or lower | 23.018 | 60.569 | -37.551 | 0.38003 | | KJo, two-tone | 40.147 | 60.569 | -20.422 | 0.66283 | | KJo, monotone | 43.359 | 60.569 | -17.210 | 0.71586 | | KJo, paired | 34.410 | 60.569 | -26.159 | 0.56811 | ## Does a shared suit matter? Split by suits, the deals give A9s 59.86% when the hands overlap in a suit and 60.53% when they do not. A9s does better with no shared suit, by 0.67 points. **A9s against KJo by suit overlap, in percent** | Deals | Specific deals | Share of deals | A9s wins | Ties | KJo wins | A9s equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 24 | 50.00 | 59.613 | 0.500 | 39.887 | 59.863 | | No shared suit | 24 | 50.00 | 60.323 | 0.419 | 39.258 | 60.533 | ## How often this matchup comes up Out of 1,624,350 ways to deal two seats two cards each, 48 are A9s in one seat and KJo in the other (0.0030%); with the seats swapped too, 96 (0.0059%). ## A worked example Put $100 each into a $200 pot and deal every board once: A9s averages $120.40 back, ahead of its $100 by $20.40, while KJo averages $79.60, short of its $100 by $20.40. A thousand deals look like this: A9s takes 600, KJo takes 396, 4 are ties. ## The same matchup from the other side One page covers both views. From KJo's side the equity is 39.80%, and from A9s' side it is 60.20%. ## Keep exploring Try As9s against KhJd 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 As9s against KhJd in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=As9s&p2=KhJd) - [A9s combos](https://georgelipoker.com/combos/a9s.md) - [KJo combos](https://georgelipoker.com/combos/kjo.md) - [A9s vs 55](https://georgelipoker.com/equity/a9s-vs-55.md) - [A9s vs QJs](https://georgelipoker.com/equity/a9s-vs-qjs.md) - [ATo vs KJo](https://georgelipoker.com/equity/ato-vs-kjo.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed We counted every case. Each suit pattern of the 48 specific A9s against KJo deals meets all 1,712,304 boards, and the better five-card hand wins; a split pot is half a win each. The flop table reads each board under all ten of its three-card flops. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [A9s vs 55: preflop equity](https://georgelipoker.com/equity/a9s-vs-55.md) - [A9s vs QJs: preflop equity](https://georgelipoker.com/equity/a9s-vs-qjs.md) - [ATo vs KJo: preflop equity](https://georgelipoker.com/equity/ato-vs-kjo.md)