--- title: "AKs vs J9s: preflop equity" url: "https://georgelipoker.com/equity/aks-vs-j9s.md" canonical_url: "https://georgelipoker.com/equity/aks-vs-j9s" last_updated: "2026-10-23" type: "reference" summary: "AKs is a big favorite over J9s before the flop: 63.24% to 36.77% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/aks-vs-jto.md", "https://georgelipoker.com/equity/aks-vs-t9s.md", "https://georgelipoker.com/equity/77-vs-j9s.md"] --- # AKs vs J9s: preflop equity AKs is a big favorite over J9s before the flop: 63.24% to 36.77% 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, AKs finishes with 63.24% of the pot and J9s with 36.76%. ## AKs against J9s: the numbers **Exact preflop results for AKs against J9s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | AKs | 62.985 | 0.501 | 36.514 | 63.235 | | J9s | 36.514 | 0.501 | 62.985 | 36.765 | AKs and J9s are both suited hands. Neither hand shares a rank with the other, so this is a contest of high cards, connection and suits. AKs is ahead, but J9s is far from dead: it takes 365 of every 1,000 deals outright. 0.50% of boards are ties, so the equity of each hand is its win rate plus half of that. The hand ranking puts AKs at 8 and J9s at 55 out of 169 starting hands. **Boards behind the percentages: 27,396,864 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | AKs | 17,256,000 | 137,000 | 10,004,000 | | J9s | 10,004,000 | 137,000 | 17,256,000 | Exact total: 16 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. **AKs 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) | | --- | --- | --- | --- | --- | | AKs | 1.720 | 1.588 | 2.739 | 0.581 | | J9s | 0.581 | 2.739 | 1.588 | 1.720 | The last column is the smallest pot odds, written as a pot-to-call ratio, at which a call breaks even with this equity. ## Who is ahead on which flops By flop texture, AKs' equity runs from 56.92% on low rainbow flops (nine high or lower) up to 65.49% on rainbow flops topped by a ten or better. AKs stays ahead on all five textures. **AKs against J9s by flop texture, in percent** | Flop | Share of flops | AKs wins | Ties | J9s wins | AKs equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.867 | 65.428 | 0.119 | 34.453 | 65.488 | | Rainbow, nine or lower | 7.042 | 56.457 | 0.916 | 42.627 | 56.915 | | Two-tone | 46.727 | 62.432 | 0.265 | 37.303 | 62.565 | | Monotone | 5.273 | 58.621 | 3.413 | 37.966 | 60.328 | | Paired | 17.091 | 65.117 | 0.612 | 34.271 | 65.423 | 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 How much does the opponent matter? Compared with its random-hand 67.05%, AKs changes by -3.81 points, and J9s, from 55.66%, by -18.90. **AKs 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 | | --- | --- | --- | --- | --- | | AKs, all flops | 63.235 | 67.045 | -3.810 | 0.94317 | | AKs, rainbow, ten or higher | 65.488 | 67.045 | -1.557 | 0.97678 | | AKs, rainbow, nine or lower | 56.915 | 67.045 | -10.130 | 0.84891 | | AKs, two-tone | 62.565 | 67.045 | -4.480 | 0.93318 | | AKs, monotone | 60.328 | 67.045 | -6.717 | 0.89981 | | AKs, paired | 65.423 | 67.045 | -1.622 | 0.97581 | | J9s, all flops | 36.765 | 55.662 | -18.897 | 0.66050 | | J9s, rainbow, ten or higher | 34.512 | 55.662 | -21.150 | 0.62003 | | J9s, rainbow, nine or lower | 43.085 | 55.662 | -12.577 | 0.77405 | | J9s, two-tone | 37.435 | 55.662 | -18.227 | 0.67254 | | J9s, monotone | 39.672 | 55.662 | -15.990 | 0.71273 | | J9s, paired | 34.577 | 55.662 | -21.085 | 0.62120 | ## Does a shared suit matter? The suit split reads 65.60% for AKs with a shared suit and 62.45% without one. AKs does better with a shared suit, by 3.15 points. **AKs against J9s by suit overlap, in percent** | Deals | Specific deals | Share of deals | AKs wins | Ties | J9s wins | AKs equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 4 | 25.00 | 65.309 | 0.580 | 34.111 | 65.599 | | No shared suit | 12 | 75.00 | 62.210 | 0.475 | 37.315 | 62.447 | ## How often this matchup comes up This page stands for 16 specific-card matchups (0.0010% of 1,624,350 ordered deals), or 32 once you count the seats both ways (0.0020%). ## A worked example Try it with money: two players each put in $100 and the whole board runs out every possible way. AKs averages $126.48 from the $200, up $26.48; J9s averages $73.52, down $26.48. Per 1,000 deals: AKs wins about 630, J9s wins about 365, and about 5 end in a split pot. ## The same matchup from the other side The reversed view, J9s against AKs, shows 36.76% for J9s and 63.24% for AKs. It is the same count, so it redirects here. ## Keep exploring Try AsKs 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 AsKs against Jh9h in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsKs&p2=Jh9h) - [AKs combos](https://georgelipoker.com/combos/aks.md) - [J9s combos](https://georgelipoker.com/combos/j9s.md) - [AKs vs JTo](https://georgelipoker.com/equity/aks-vs-jto.md) - [AKs vs T9s](https://georgelipoker.com/equity/aks-vs-t9s.md) - [77 vs J9s](https://georgelipoker.com/equity/77-vs-j9s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed We counted every case. Each suit pattern of the 16 specific AKs 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 - [AKs vs JTo: preflop equity](https://georgelipoker.com/equity/aks-vs-jto.md) - [AKs vs T9s: preflop equity](https://georgelipoker.com/equity/aks-vs-t9s.md) - [77 vs J9s: preflop equity](https://georgelipoker.com/equity/77-vs-j9s.md)