--- title: "A7s vs K9s: preflop equity" url: "https://georgelipoker.com/equity/a7s-vs-k9s.md" canonical_url: "https://georgelipoker.com/equity/a7s-vs-k9s" last_updated: "2026-10-23" type: "reference" summary: "Who is ahead, A7s or K9s? A7s leads 58.60% to 41.40% before the flop, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/a7s-vs-a5s.md", "https://georgelipoker.com/equity/a7s-vs-a6s.md", "https://georgelipoker.com/equity/a9o-vs-k9s.md"] --- # A7s vs K9s: preflop equity Who is ahead, A7s or K9s? A7s leads 58.60% to 41.40% before the flop, counted exactly over every board, with the split by flop type and suit. Averaged over every possible board, A7s is ahead of K9s by 17.20 points of equity, 58.60% to 41.40%. ## A7s against K9s: the numbers **Exact preflop results for A7s against K9s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | A7s | 58.361 | 0.474 | 41.165 | 58.598 | | K9s | 41.165 | 0.474 | 58.361 | 41.402 | Each side holds one of the suited hands: A7s and K9s. The two hands share no rank, which makes this a pure matchup of card strength, straight chances and flush chances. That is a modest edge, the kind that shows up over many hands and is easy to miss in one. Of every 100 boards, about 0.47 are split pots, and the equity figures already include them. Among the 169 starting hands, A7s is number 24 and K9s is number 29 by strength against a random hand. **Boards behind the percentages: 27,396,864 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | A7s | 15,989,000 | 130,000 | 11,278,000 | | K9s | 11,278,000 | 130,000 | 15,989,000 | 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. **A7s against K9s read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | A7s | 1.415 | 1.713 | 2.429 | 0.707 | | K9s | 0.707 | 2.429 | 1.713 | 1.415 | 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 A7s prefers paired flops, where it holds 63.17%, and likes monotone flops least, where it holds 55.76%. A7s stays ahead on all five textures. **A7s against K9s by flop texture, in percent** | Flop | Share of flops | A7s wins | Ties | K9s wins | A7s equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.543 | 58.341 | 0.161 | 41.498 | 58.421 | | Rainbow, nine or lower | 6.366 | 57.035 | 0.629 | 42.336 | 57.350 | | Two-tone | 46.727 | 57.392 | 0.232 | 42.376 | 57.508 | | Monotone | 5.273 | 54.063 | 3.396 | 42.541 | 55.761 | | Paired | 17.091 | 62.856 | 0.628 | 36.516 | 63.170 | Rainbow flops have three suits, two-tone flops repeat one suit, monotone flops are all one suit, and paired flops repeat a rank. ## Compared with a random hand Relative to a random opponent, A7s changes by -2.38 points (baseline 60.98%) and K9s by -18.59 points (baseline 59.99%). **A7s and K9s 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 | | --- | --- | --- | --- | --- | | A7s, all flops | 58.598 | 60.984 | -2.386 | 0.96087 | | A7s, rainbow, ten or higher | 58.421 | 60.984 | -2.563 | 0.95797 | | A7s, rainbow, nine or lower | 57.350 | 60.984 | -3.634 | 0.94041 | | A7s, two-tone | 57.508 | 60.984 | -3.476 | 0.94300 | | A7s, monotone | 55.761 | 60.984 | -5.223 | 0.91435 | | A7s, paired | 63.170 | 60.984 | +2.186 | 1.03585 | | K9s, all flops | 41.402 | 59.988 | -18.586 | 0.69017 | | K9s, rainbow, ten or higher | 41.579 | 59.988 | -18.409 | 0.69312 | | K9s, rainbow, nine or lower | 42.650 | 59.988 | -17.338 | 0.71098 | | K9s, two-tone | 42.492 | 59.988 | -17.496 | 0.70834 | | K9s, monotone | 44.239 | 59.988 | -15.749 | 0.73746 | | K9s, paired | 36.830 | 59.988 | -23.158 | 0.61396 | ## Does a shared suit matter? Of the deals of this matchup, 4 share a suit (A7s at 60.64%) and 12 do not (57.92%). A7s does better with a shared suit, by 2.72 points. **A7s against K9s by suit overlap, in percent** | Deals | Specific deals | Share of deals | A7s wins | Ties | K9s wins | A7s equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 4 | 25.00 | 60.366 | 0.549 | 39.085 | 60.641 | | No shared suit | 12 | 75.00 | 57.692 | 0.449 | 41.859 | 57.917 | ## How often this matchup comes up A7s against K9s is made up of 16 specific-card matchups in one seat order, 0.0010% of the 1,624,350 ordered deals, and 32 counting both seat orders, 0.0020%. ## A worked example Say each player puts $100 in before the flop, making a $200 pot. On average A7s takes back $117.20 of it, which is $17.20 more than it put in, and K9s takes back $82.80, $17.20 less than it put in. In 1,000 deals of exactly this matchup, expect about 583 won outright by A7s, about 412 won outright by K9s and about 5 split. ## The same matchup from the other side One page covers both views. From K9s' side the equity is 41.40%, and from A7s' side it is 58.60%. ## Keep exploring As7s against Kh9h is a ready-made deal for the calculator, with no suit in common between the hands. The neighboring matchups below replace one hand with another of similar strength. - [Open As7s against Kh9h in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=As7s&p2=Kh9h) - [A7s combos](https://georgelipoker.com/combos/a7s.md) - [K9s combos](https://georgelipoker.com/combos/k9s.md) - [A7s vs A5s](https://georgelipoker.com/equity/a7s-vs-a5s.md) - [A7s vs A6s](https://georgelipoker.com/equity/a7s-vs-a6s.md) - [A9o vs K9s](https://georgelipoker.com/equity/a9o-vs-k9s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed The figures are counted, not estimated: 1,712,304 boards for every suit pattern of the 16 specific deals, with both seven-card hands compared each time. Equity gives half a win for a tie. For the flop rows, a board is counted once under each of the ten flops inside it. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [A7s vs A5s: preflop equity](https://georgelipoker.com/equity/a7s-vs-a5s.md) - [A7s vs A6s: preflop equity](https://georgelipoker.com/equity/a7s-vs-a6s.md) - [A9o vs K9s: preflop equity](https://georgelipoker.com/equity/a9o-vs-k9s.md)