--- title: "A7s vs K9o: preflop equity" url: "https://georgelipoker.com/equity/a7s-vs-k9o.md" canonical_url: "https://georgelipoker.com/equity/a7s-vs-k9o" last_updated: "2026-10-23" type: "reference" summary: "A7s is a big favorite over K9o before the flop: 61.45% to 38.55% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/a7s-vs-q9s.md", "https://georgelipoker.com/equity/a7s-vs-jts.md", "https://georgelipoker.com/equity/a9o-vs-k9o.md"] --- # A7s vs K9o: preflop equity A7s is a big favorite over K9o before the flop: 61.45% to 38.55% equity, counted exactly over every board, with the split by flop type and suit. Dealt all in against each other, A7s takes 61.45% of the pot on average and K9o takes the other 38.55%. ## A7s against K9o: the numbers **Exact preflop results for A7s against K9o, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | A7s | 61.235 | 0.428 | 38.337 | 61.449 | | K9o | 38.337 | 0.428 | 61.235 | 38.551 | One side is a suited hand, the other is an offsuit hand. 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. Ties are part of the picture: 0.43% of boards end in a split pot, and each side counts that as half a win. In the ranking of all 169 starting hands, A7s is number 24 and K9o is number 40. **Boards behind the percentages: 82,190,592 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | A7s | 50,329,000 | 352,000 | 31,509,000 | | K9o | 31,509,000 | 352,000 | 50,329,000 | The total is exact: 48 specific deals times 1,712,304 boards. The three counts are approximate, worked out from the percentages to five decimals and rounded to the nearest thousand. **A7s against K9o 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 | 1.594 | 1.633 | 2.608 | 0.627 | | K9o | 0.627 | 2.608 | 1.633 | 1.594 | 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 Split by what the flop looks like, A7s peaks at 66.09% on paired flops and bottoms out at 57.80% on monotone flops. A7s stays ahead on all five textures. **A7s against K9o by flop texture, in percent** | Flop | Share of flops | A7s wins | Ties | K9o wins | A7s equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.665 | 59.855 | 0.164 | 39.981 | 59.937 | | Rainbow, nine or lower | 6.365 | 58.873 | 0.652 | 40.475 | 59.199 | | Two-tone | 46.667 | 61.138 | 0.247 | 38.615 | 61.261 | | Monotone | 5.212 | 56.625 | 2.358 | 41.017 | 57.804 | | Paired | 17.091 | 65.779 | 0.628 | 33.593 | 66.093 | 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 +0.47 points for A7s, from 60.98%, and -19.26 for K9o, from 57.81%. **A7s and K9o 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 | 61.449 | 60.984 | +0.465 | 1.00762 | | A7s, rainbow, ten or higher | 59.937 | 60.984 | -1.047 | 0.98283 | | A7s, rainbow, nine or lower | 59.199 | 60.984 | -1.785 | 0.97073 | | A7s, two-tone | 61.261 | 60.984 | +0.277 | 1.00454 | | A7s, monotone | 57.804 | 60.984 | -3.180 | 0.94786 | | A7s, paired | 66.093 | 60.984 | +5.109 | 1.08378 | | K9o, all flops | 38.551 | 57.812 | -19.261 | 0.66683 | | K9o, rainbow, ten or higher | 40.063 | 57.812 | -17.749 | 0.69299 | | K9o, rainbow, nine or lower | 40.801 | 57.812 | -17.011 | 0.70575 | | K9o, two-tone | 38.739 | 57.812 | -19.073 | 0.67009 | | K9o, monotone | 42.196 | 57.812 | -15.616 | 0.72988 | | K9o, paired | 33.907 | 57.812 | -23.905 | 0.58650 | ## Does a shared suit matter? Does suit overlap move the numbers? A7s has 61.13% when the hands share a suit and 61.76% when they do not. A7s does better with no shared suit, by 0.63 points. **A7s against K9o by suit overlap, in percent** | Deals | Specific deals | Share of deals | A7s wins | Ties | K9o wins | A7s equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 24 | 50.00 | 60.900 | 0.468 | 38.632 | 61.134 | | No shared suit | 24 | 50.00 | 61.571 | 0.387 | 38.042 | 61.764 | ## How often this matchup comes up You will meet this exact matchup 0.0059% of the time in a random heads-up deal: 96 of 1,624,350, counting either seat order. ## A worked example A $100 all-in from each player makes a $200 pot, and the exact equity says A7s gets $122.90 of it on average and K9o gets $77.10. In 1,000 deals of exactly this matchup, expect about 612 won outright by A7s, about 384 won outright by K9o and about 4 split. ## The same matchup from the other side The reversed view, K9o against A7s, shows 38.55% for K9o and 61.45% for A7s. It is the same count, so it redirects here. ## Keep exploring As7s against Kh9d 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 Kh9d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=As7s&p2=Kh9d) - [A7s combos](https://georgelipoker.com/combos/a7s.md) - [K9o combos](https://georgelipoker.com/combos/k9o.md) - [A7s vs Q9s](https://georgelipoker.com/equity/a7s-vs-q9s.md) - [A7s vs JTs](https://georgelipoker.com/equity/a7s-vs-jts.md) - [A9o vs K9o](https://georgelipoker.com/equity/a9o-vs-k9o.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed All 1,712,304 five-card boards are dealt for every suit pattern among the 48 specific deals of A7s against K9o, and both hands are scored on each. That is a full count, so the percentages are exact. Ties are half a win each, and each board appears once per flop it contains. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [A7s vs Q9s: preflop equity](https://georgelipoker.com/equity/a7s-vs-q9s.md) - [A7s vs JTs: preflop equity](https://georgelipoker.com/equity/a7s-vs-jts.md) - [A9o vs K9o: preflop equity](https://georgelipoker.com/equity/a9o-vs-k9o.md)