--- title: "AA vs J9s: preflop equity" url: "https://georgelipoker.com/equity/aa-vs-j9s.md" canonical_url: "https://georgelipoker.com/equity/aa-vs-j9s" last_updated: "2026-10-23" type: "reference" summary: "AA is a big favorite over J9s before the flop: 79.44% to 20.56% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/aa-vs-jto.md", "https://georgelipoker.com/equity/aa-vs-t9s.md", "https://georgelipoker.com/equity/kk-vs-j9s.md"] --- # AA vs J9s: preflop equity AA is a big favorite over J9s before the flop: 79.44% to 20.56% 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, AA finishes with 79.44% of the pot and J9s with 20.56%. ## AA against J9s: the numbers **Exact preflop results for AA against J9s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | AA | 79.254 | 0.371 | 20.375 | 79.439 | | J9s | 20.375 | 0.371 | 79.254 | 20.561 | AA is a pocket pair and J9s is a suited hand. A pair against two lower cards is a lopsided matchup: the pair is ahead and the other hand has no overcard to catch. A lead of 58.88 points is large but not decisive: J9s still takes about 204 of every 1,000 deals. A split pot comes up on 0.37% of boards, so the wins and the equity differ by half of that. Among the 169 starting hands, AA is number 1 and J9s is number 55 by strength against a random hand. **Boards behind the percentages: 41,095,296 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | AA | 32,570,000 | 152,000 | 8,373,000 | | J9s | 8,373,000 | 152,000 | 32,570,000 | 24 specific deals times 1,712,304 boards gives the exact total. The won, tied and lost counts are approximations from the five-decimal percentages, rounded to the nearest thousand. **AA 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) | | --- | --- | --- | --- | --- | | AA | 3.864 | 1.262 | 4.908 | 0.259 | | J9s | 0.259 | 4.908 | 1.262 | 3.864 | In the last column, a pot-to-call ratio at or above the figure makes a call break even or better at this equity. ## Who is ahead on which flops If you know the kind of flop that came, the numbers shift: AA holds 85.18% on low rainbow flops (nine high or lower) and 74.08% on monotone flops. AA stays ahead on all five textures. **AA against J9s by flop texture, in percent** | Flop | Share of flops | AA wins | Ties | J9s wins | AA equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.867 | 79.759 | 0.157 | 20.084 | 79.837 | | Rainbow, nine or lower | 7.042 | 84.720 | 0.918 | 14.362 | 85.179 | | Two-tone | 46.545 | 77.415 | 0.306 | 22.279 | 77.568 | | Monotone | 5.212 | 72.880 | 2.401 | 24.719 | 74.080 | | Paired | 17.334 | 83.194 | 0.007 | 16.799 | 83.197 | Read the flop types this way: rainbow has three suits, two-tone has two cards of one suit, monotone has three, and paired repeats a rank. ## Compared with a random hand Compared with a random opponent, this matchup shifts AA from 85.20% by -5.76 points and J9s from 55.66% by -35.10 points. **AA 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 | | --- | --- | --- | --- | --- | | AA, all flops | 79.439 | 85.204 | -5.765 | 0.93234 | | AA, rainbow, ten or higher | 79.837 | 85.204 | -5.367 | 0.93701 | | AA, rainbow, nine or lower | 85.179 | 85.204 | -0.025 | 0.99971 | | AA, two-tone | 77.568 | 85.204 | -7.636 | 0.91038 | | AA, monotone | 74.080 | 85.204 | -11.124 | 0.86944 | | AA, paired | 83.197 | 85.204 | -2.007 | 0.97644 | | J9s, all flops | 20.561 | 55.662 | -35.101 | 0.36939 | | J9s, rainbow, ten or higher | 20.163 | 55.662 | -35.499 | 0.36224 | | J9s, rainbow, nine or lower | 14.821 | 55.662 | -40.841 | 0.26627 | | J9s, two-tone | 22.432 | 55.662 | -33.230 | 0.40300 | | J9s, monotone | 25.920 | 55.662 | -29.742 | 0.46567 | | J9s, paired | 16.803 | 55.662 | -38.859 | 0.30188 | ## Does a shared suit matter? Of the deals of this matchup, 12 share a suit (AA at 80.03%) and 12 do not (78.85%). AA does better with a shared suit, by 1.18 points. **AA against J9s by suit overlap, in percent** | Deals | Specific deals | Share of deals | AA wins | Ties | J9s wins | AA equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 50.00 | 79.820 | 0.413 | 19.767 | 80.027 | | No shared suit | 12 | 50.00 | 78.688 | 0.329 | 20.983 | 78.852 | ## How often this matchup comes up This page stands for 24 specific-card matchups (0.0015% of 1,624,350 ordered deals), or 48 once you count the seats both ways (0.0030%). ## A worked example Try it with money: two players each put in $100 and the whole board runs out every possible way. AA averages $158.88 from the $200, up $58.88; J9s averages $41.12, down $58.88. Per 1,000 deals: AA wins about 792, J9s wins about 204, and about 4 end in a split pot. ## The same matchup from the other side J9s versus AA is this same page seen from the other hand: 20.56% for J9s, 79.44% for AA. ## Keep exploring Try AsAh against Jd9d 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 AsAh against Jd9d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsAh&p2=Jd9d) - [AA combos](https://georgelipoker.com/combos/aa.md) - [J9s combos](https://georgelipoker.com/combos/j9s.md) - [AA vs JTo](https://georgelipoker.com/equity/aa-vs-jto.md) - [AA vs T9s](https://georgelipoker.com/equity/aa-vs-t9s.md) - [KK vs J9s](https://georgelipoker.com/equity/kk-vs-j9s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Nothing here is simulated. The 24 deals of AA against J9s 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 - [AA vs JTo: preflop equity](https://georgelipoker.com/equity/aa-vs-jto.md) - [AA vs T9s: preflop equity](https://georgelipoker.com/equity/aa-vs-t9s.md) - [KK vs J9s: preflop equity](https://georgelipoker.com/equity/kk-vs-j9s.md)