--- title: "A5s vs J9s: preflop equity" url: "https://georgelipoker.com/equity/a5s-vs-j9s.md" canonical_url: "https://georgelipoker.com/equity/a5s-vs-j9s" last_updated: "2026-10-23" type: "reference" summary: "Who is ahead, A5s or J9s? A5s leads 56.17% to 43.83% before the flop, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/a5s-vs-jto.md", "https://georgelipoker.com/equity/a5s-vs-t9s.md", "https://georgelipoker.com/equity/a6s-vs-j9s.md"] --- # A5s vs J9s: preflop equity Who is ahead, A5s or J9s? A5s leads 56.17% to 43.83% before the flop, counted exactly over every board, with the split by flop type and suit. If A5s and J9s get all the chips in before the flop, A5s owns 56.17% of the pot in the long run and J9s owns 43.83%. ## A5s against J9s: the numbers **Exact preflop results for A5s against J9s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | A5s | 55.920 | 0.505 | 43.575 | 56.172 | | J9s | 43.575 | 0.505 | 55.920 | 43.828 | This is a contest between two suited hands, A5s and J9s. The two hands share no rank, which makes this a pure matchup of card strength, straight chances and flush chances. A5s is ahead, but J9s is far from dead: it takes 436 of every 1,000 deals outright. Split pots make up 0.51% of the boards, and both equity figures count them as half a win each. A5s ranks number 30 of 169 starting hands, and J9s ranks number 55, by equity against a random hand. **Boards behind the percentages: 27,396,864 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | A5s | 15,320,000 | 138,000 | 11,938,000 | | J9s | 11,938,000 | 138,000 | 15,320,000 | 16 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. **A5s 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) | | --- | --- | --- | --- | --- | | A5s | 1.282 | 1.788 | 2.295 | 0.780 | | J9s | 0.780 | 2.295 | 1.788 | 1.282 | 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 A5s prefers paired flops, where it holds 61.40%, and likes monotone flops least, where it holds 53.98%. A5s stays ahead on all five textures. **A5s against J9s by flop texture, in percent** | Flop | Share of flops | A5s wins | Ties | J9s wins | A5s equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.543 | 54.972 | 0.165 | 44.863 | 55.054 | | Rainbow, nine or lower | 6.366 | 56.204 | 0.777 | 43.019 | 56.592 | | Two-tone | 46.727 | 54.907 | 0.266 | 44.827 | 55.040 | | Monotone | 5.273 | 52.265 | 3.427 | 44.308 | 53.979 | | Paired | 17.091 | 61.072 | 0.645 | 38.283 | 61.395 | 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 The table below sets each hand against its own random-hand baseline: a change of -3.75 points for A5s, from 59.92%, and -11.83 for J9s, from 55.66%. **A5s 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 | | --- | --- | --- | --- | --- | | A5s, all flops | 56.172 | 59.923 | -3.751 | 0.93740 | | A5s, rainbow, ten or higher | 55.054 | 59.923 | -4.869 | 0.91875 | | A5s, rainbow, nine or lower | 56.592 | 59.923 | -3.331 | 0.94441 | | A5s, two-tone | 55.040 | 59.923 | -4.883 | 0.91851 | | A5s, monotone | 53.979 | 59.923 | -5.944 | 0.90081 | | A5s, paired | 61.395 | 59.923 | +1.472 | 1.02456 | | J9s, all flops | 43.828 | 55.662 | -11.834 | 0.78740 | | J9s, rainbow, ten or higher | 44.946 | 55.662 | -10.716 | 0.80748 | | J9s, rainbow, nine or lower | 43.408 | 55.662 | -12.254 | 0.77985 | | J9s, two-tone | 44.960 | 55.662 | -10.702 | 0.80773 | | J9s, monotone | 46.021 | 55.662 | -9.641 | 0.82679 | | J9s, paired | 38.605 | 55.662 | -17.057 | 0.69356 | ## Does a shared suit matter? Suit overlap shows up in the numbers. With a suit in common A5s has 57.92% equity, and with none in common it has 55.59%. A5s does better with a shared suit, by 2.33 points. **A5s against J9s by suit overlap, in percent** | Deals | Specific deals | Share of deals | A5s wins | Ties | J9s wins | A5s equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 4 | 25.00 | 57.627 | 0.585 | 41.788 | 57.920 | | No shared suit | 12 | 75.00 | 55.351 | 0.478 | 44.171 | 55.590 | ## 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 To see what the equity is worth, imagine $100 each in a $200 pot. A5s is worth $112.34 on average (+$12.34); J9s is worth $87.66 (-$12.34). Over a long run, 1,000 deals split into about 559 for A5s, 436 for J9s and 5 tied. ## The same matchup from the other side The reversed view, J9s against A5s, shows 43.83% for J9s and 56.17% for A5s. It is the same count, so it redirects here. ## Keep exploring Try As5s 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 As5s against Jh9h in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=As5s&p2=Jh9h) - [A5s combos](https://georgelipoker.com/combos/a5s.md) - [J9s combos](https://georgelipoker.com/combos/j9s.md) - [A5s vs JTo](https://georgelipoker.com/equity/a5s-vs-jto.md) - [A5s vs T9s](https://georgelipoker.com/equity/a5s-vs-t9s.md) - [A6s vs J9s](https://georgelipoker.com/equity/a6s-vs-j9s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Each figure is a complete count over boards. Take the 16 specific deals, group them by suit pattern, deal all 1,712,304 boards against each, and compare the two seven-card hands. Equity counts a tie as half a win; the flop rows use every one of a board's ten flops. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [A5s vs JTo: preflop equity](https://georgelipoker.com/equity/a5s-vs-jto.md) - [A5s vs T9s: preflop equity](https://georgelipoker.com/equity/a5s-vs-t9s.md) - [A6s vs J9s: preflop equity](https://georgelipoker.com/equity/a6s-vs-j9s.md)