--- title: "AKo vs A9s: preflop equity" url: "https://georgelipoker.com/equity/ako-vs-a9s.md" canonical_url: "https://georgelipoker.com/equity/ako-vs-a9s" last_updated: "2026-10-23" type: "reference" summary: "AKo is a big favorite over A9s before the flop: 69.96% to 30.04% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/ako-vs-ato.md", "https://georgelipoker.com/equity/ako-vs-kjs.md", "https://georgelipoker.com/equity/ats-vs-a9s.md"] --- # AKo vs A9s: preflop equity AKo is a big favorite over A9s before the flop: 69.96% to 30.04% equity, counted exactly over every board, with the split by flop type and suit. Dealt all in against each other, AKo takes 69.96% of the pot on average and A9s takes the other 30.04%. ## AKo against A9s: the numbers **Exact preflop results for AKo against A9s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | AKo | 67.712 | 4.491 | 27.797 | 69.957 | | A9s | 27.797 | 4.491 | 67.712 | 30.043 | We compare an offsuit hand with a suited hand. Sharing a rank is the signature of a dominated hand, since the weaker hand is usually out-kicked when the shared rank shows up. That is a clear edge, 69.96% to 30.04%, but A9s still wins often enough that one hand proves nothing. A split pot comes up on 4.49% of boards, so the wins and the equity differ by half of that. Among the 169 starting hands, AKo is number 12 and A9s is number 18 by strength against a random hand. **Boards behind the percentages: 61,642,944 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | AKo | 41,740,000 | 2,768,000 | 17,135,000 | | A9s | 17,135,000 | 2,768,000 | 41,740,000 | Exact total: 36 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. **AKo against A9s read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | AKo | 2.329 | 1.477 | 3.598 | 0.429 | | A9s | 0.429 | 3.598 | 1.477 | 2.329 | 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 Break the boards down by their first three cards and AKo is strongest on rainbow flops topped by a ten or better (76.96%) and weakest on low rainbow flops (nine high or lower) (58.07%). AKo stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **AKo against A9s by flop texture, in percent** | Flop | Share of flops | AKo wins | Ties | A9s wins | AKo equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.905 | 75.742 | 2.440 | 21.818 | 76.962 | | Rainbow, nine or lower | 7.042 | 55.839 | 4.466 | 39.695 | 58.072 | | Two-tone | 46.527 | 67.446 | 2.717 | 29.837 | 68.804 | | Monotone | 5.192 | 62.506 | 4.005 | 33.489 | 64.508 | | Paired | 17.334 | 63.735 | 12.237 | 24.028 | 69.853 | 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 Against one random hand instead, AKo holds 65.32% and A9s holds 62.78%. Facing each other changes that by +4.64 points for AKo and -32.74 points for A9s. **AKo and A9s 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 | | --- | --- | --- | --- | --- | | AKo, all flops | 69.957 | 65.320 | +4.637 | 1.07099 | | AKo, rainbow, ten or higher | 76.962 | 65.320 | +11.642 | 1.17823 | | AKo, rainbow, nine or lower | 58.072 | 65.320 | -7.248 | 0.88904 | | AKo, two-tone | 68.804 | 65.320 | +3.484 | 1.05334 | | AKo, monotone | 64.508 | 65.320 | -0.812 | 0.98757 | | AKo, paired | 69.853 | 65.320 | +4.533 | 1.06940 | | A9s, all flops | 30.043 | 62.781 | -32.738 | 0.47854 | | A9s, rainbow, ten or higher | 23.038 | 62.781 | -39.743 | 0.36696 | | A9s, rainbow, nine or lower | 41.928 | 62.781 | -20.853 | 0.66785 | | A9s, two-tone | 31.196 | 62.781 | -31.585 | 0.49690 | | A9s, monotone | 35.492 | 62.781 | -27.289 | 0.56533 | | A9s, paired | 30.147 | 62.781 | -32.634 | 0.48019 | ## Does a shared suit matter? Looking only at deals where the hands share a suit, AKo has 70.80%; looking only at deals where they do not, 69.54%. AKo does better with a shared suit, by 1.26 points. **AKo against A9s by suit overlap, in percent** | Deals | Specific deals | Share of deals | AKo wins | Ties | A9s wins | AKo equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 33.33 | 68.511 | 4.570 | 26.919 | 70.796 | | No shared suit | 24 | 66.67 | 67.312 | 4.451 | 28.237 | 69.538 | ## How often this matchup comes up This page stands for 36 specific-card matchups (0.0022% of 1,624,350 ordered deals), or 72 once you count the seats both ways (0.0044%). ## A worked example A $100 all-in from each player makes a $200 pot, and the exact equity says AKo gets $139.92 of it on average and A9s gets $60.08. In 1,000 deals of exactly this matchup, expect about 677 won outright by AKo, about 278 won outright by A9s and about 45 split. ## The same matchup from the other side Swap the hands and you get A9s with 30.04% against AKo with 69.96%. We keep one page per matchup, with the better-ranked hand first. ## Keep exploring Try AsKh against Ad9d 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 AsKh against Ad9d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsKh&p2=Ad9d) - [AKo combos](https://georgelipoker.com/combos/ako.md) - [A9s combos](https://georgelipoker.com/combos/a9s.md) - [AKo vs ATo](https://georgelipoker.com/equity/ako-vs-ato.md) - [AKo vs KJs](https://georgelipoker.com/equity/ako-vs-kjs.md) - [ATs vs A9s](https://georgelipoker.com/equity/ats-vs-a9s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Nothing here is simulated. The 36 deals of AKo against A9s fall into a few suit patterns, each dealt against all 1,712,304 boards, with both best five-card hands compared on every board. Ties give each hand half a win, and the flop rows count a board under each of its ten flops. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [AKo vs ATo: preflop equity](https://georgelipoker.com/equity/ako-vs-ato.md) - [AKo vs KJs: preflop equity](https://georgelipoker.com/equity/ako-vs-kjs.md) - [ATs vs A9s: preflop equity](https://georgelipoker.com/equity/ats-vs-a9s.md)