--- title: "AKo vs J9s: preflop equity" url: "https://georgelipoker.com/equity/ako-vs-j9s.md" canonical_url: "https://georgelipoker.com/equity/ako-vs-j9s" last_updated: "2026-10-23" type: "reference" summary: "AKo is a big favorite over J9s before the flop: 60.74% to 39.26% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/ako-vs-jto.md", "https://georgelipoker.com/equity/ako-vs-t9s.md", "https://georgelipoker.com/equity/ats-vs-j9s.md"] --- # AKo vs J9s: preflop equity AKo is a big favorite over J9s before the flop: 60.74% to 39.26% equity, counted exactly over every board, with the split by flop type and suit. In equity, AKo against J9s stands at 60.74% to 39.26%, a gap of 21.48 points. ## AKo against J9s: the numbers **Exact preflop results for AKo against J9s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | AKo | 60.509 | 0.458 | 39.033 | 60.738 | | J9s | 39.033 | 0.458 | 60.509 | 39.262 | The matchup pits an offsuit hand against a suited hand. The two hands share no rank, which makes this a pure matchup of card strength, straight chances and flush chances. A 21.48 point lead is real, and J9s still takes about 390 of every 1,000 deals outright. About 0.46% of boards chop the pot, which is why equity sits slightly above the win figure for both hands. By strength against a random hand, AKo holds place 12 of 169 and J9s holds place 55. **Boards behind the percentages: 82,190,592 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | AKo | 49,733,000 | 376,000 | 32,081,000 | | J9s | 32,081,000 | 376,000 | 49,733,000 | The board total is exact, 48 deals at 1,712,304 boards each. Won, tied and lost counts are rounded to the nearest thousand from the five-decimal percentages. **AKo 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) | | --- | --- | --- | --- | --- | | AKo | 1.547 | 1.653 | 2.562 | 0.646 | | J9s | 0.646 | 2.562 | 1.653 | 1.547 | 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 Split by what the flop looks like, AKo peaks at 64.13% on rainbow flops topped by a ten or better and bottoms out at 54.85% on low rainbow flops (nine high or lower). AKo stays ahead on all five textures. **AKo against J9s by flop texture, in percent** | Flop | Share of flops | AKo wins | Ties | J9s wins | AKo equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.988 | 64.065 | 0.124 | 35.811 | 64.127 | | Rainbow, nine or lower | 7.042 | 54.375 | 0.949 | 44.676 | 54.849 | | Two-tone | 46.667 | 59.030 | 0.285 | 40.685 | 59.173 | | Monotone | 5.212 | 57.683 | 2.380 | 39.937 | 58.873 | | Paired | 17.091 | 62.943 | 0.612 | 36.445 | 63.249 | Flop types: rainbow means three different suits, two-tone means one suit twice, monotone means one suit three times, paired means a repeated rank. ## Compared with a random hand Each hand has a baseline against a random hand: 65.32% for AKo, 55.66% for J9s. Here the change is -4.58 and -16.40 points. **AKo 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 | | --- | --- | --- | --- | --- | | AKo, all flops | 60.738 | 65.320 | -4.582 | 0.92985 | | AKo, rainbow, ten or higher | 64.127 | 65.320 | -1.193 | 0.98174 | | AKo, rainbow, nine or lower | 54.849 | 65.320 | -10.471 | 0.83970 | | AKo, two-tone | 59.173 | 65.320 | -6.147 | 0.90589 | | AKo, monotone | 58.873 | 65.320 | -6.447 | 0.90130 | | AKo, paired | 63.249 | 65.320 | -2.071 | 0.96829 | | J9s, all flops | 39.262 | 55.662 | -16.400 | 0.70536 | | J9s, rainbow, ten or higher | 35.873 | 55.662 | -19.789 | 0.64448 | | J9s, rainbow, nine or lower | 45.151 | 55.662 | -10.511 | 0.81116 | | J9s, two-tone | 40.827 | 55.662 | -14.835 | 0.73348 | | J9s, monotone | 41.127 | 55.662 | -14.535 | 0.73887 | | J9s, paired | 36.751 | 55.662 | -18.911 | 0.66025 | ## Does a shared suit matter? The suit split reads 61.45% for AKo with a shared suit and 60.03% without one. AKo does better with a shared suit, by 1.42 points. **AKo against J9s by suit overlap, in percent** | Deals | Specific deals | Share of deals | AKo wins | Ties | J9s wins | AKo equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 24 | 50.00 | 61.195 | 0.499 | 38.306 | 61.445 | | No shared suit | 24 | 50.00 | 59.823 | 0.417 | 39.760 | 60.031 | ## How often this matchup comes up Counting specific cards, AKo against J9s appears in 48 of the 1,624,350 ordered heads-up deals (0.0030%), and in 96 when the seats are swapped too (0.0059%). ## A worked example Try it with money: two players each put in $100 and the whole board runs out every possible way. AKo averages $121.48 from the $200, up $21.48; J9s averages $78.52, down $21.48. A thousand deals look like this: AKo takes 605, J9s takes 390, 5 are ties. ## The same matchup from the other side If you came looking for J9s against AKo, the numbers are the same with the hands swapped: 39.26% and 60.74%. ## Keep exploring The calculator link fills in AsKh against Jd9d, a deal where the two hands share no suit. Change any card to test your own hand. The neighboring matchups below swap one of the two hands for one of similar strength. - [Open AsKh against Jd9d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsKh&p2=Jd9d) - [AKo combos](https://georgelipoker.com/combos/ako.md) - [J9s combos](https://georgelipoker.com/combos/j9s.md) - [AKo vs JTo](https://georgelipoker.com/equity/ako-vs-jto.md) - [AKo vs T9s](https://georgelipoker.com/equity/ako-vs-t9s.md) - [ATs vs J9s](https://georgelipoker.com/equity/ats-vs-j9s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed We counted every case. Each suit pattern of the 48 specific AKo against J9s 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 - [AKo vs JTo: preflop equity](https://georgelipoker.com/equity/ako-vs-jto.md) - [AKo vs T9s: preflop equity](https://georgelipoker.com/equity/ako-vs-t9s.md) - [ATs vs J9s: preflop equity](https://georgelipoker.com/equity/ats-vs-j9s.md)