--- title: "ATs vs K9o: preflop equity" url: "https://georgelipoker.com/equity/ats-vs-k9o.md" canonical_url: "https://georgelipoker.com/equity/ats-vs-k9o" last_updated: "2026-10-23" type: "reference" summary: "ATs is a big favorite over K9o before the flop: 66.24% to 33.76% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/ats-vs-q9s.md", "https://georgelipoker.com/equity/ats-vs-jts.md", "https://georgelipoker.com/equity/aqo-vs-k9o.md"] --- # ATs vs K9o: preflop equity ATs is a big favorite over K9o before the flop: 66.24% to 33.76% equity, counted exactly over every board, with the split by flop type and suit. Dealt all in against each other, ATs takes 66.24% of the pot on average and K9o takes the other 33.76%. ## ATs against K9o: the numbers **Exact preflop results for ATs against K9o, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | ATs | 66.017 | 0.450 | 33.533 | 66.242 | | K9o | 33.533 | 0.450 | 66.017 | 33.758 | ATs and K9o are a suited hand and an offsuit hand, in that order. With no overlap in ranks, every card that pairs one hand is a card that does not pair the other. ATs is the clear favorite, though K9o gets there on roughly one board in 3. A split pot comes up on 0.45% of boards, so the wins and the equity differ by half of that. In the ranking of all 169 starting hands, ATs is number 13 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 | | --- | --- | --- | --- | | ATs | 54,260,000 | 370,000 | 27,561,000 | | K9o | 27,561,000 | 370,000 | 54,260,000 | 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. **ATs 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) | | --- | --- | --- | --- | --- | | ATs | 1.962 | 1.515 | 2.982 | 0.510 | | K9o | 0.510 | 2.982 | 1.515 | 1.962 | The last column is the break-even price: the pot odds a call needs to offer, as a ratio of pot to call. ## Who is ahead on which flops Across the five flop textures ATs' equity moves by 7.10 points, from 61.66% on low rainbow flops (nine high or lower) to 68.76% on paired flops. ATs stays ahead on all five textures. **ATs against K9o by flop texture, in percent** | Flop | Share of flops | ATs wins | Ties | K9o wins | ATs equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.988 | 66.369 | 0.154 | 33.477 | 66.446 | | Rainbow, nine or lower | 7.042 | 61.265 | 0.792 | 37.943 | 61.661 | | Two-tone | 46.667 | 66.276 | 0.276 | 33.448 | 66.414 | | Monotone | 5.212 | 60.501 | 2.373 | 37.126 | 61.687 | | Paired | 17.091 | 68.454 | 0.616 | 30.930 | 68.762 | 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 Start from the random-hand figures, 64.60% for ATs and 57.81% for K9o. This opponent changes them by +1.64 and -24.05 points. **ATs 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 | | --- | --- | --- | --- | --- | | ATs, all flops | 66.242 | 64.602 | +1.640 | 1.02539 | | ATs, rainbow, ten or higher | 66.446 | 64.602 | +1.844 | 1.02854 | | ATs, rainbow, nine or lower | 61.661 | 64.602 | -2.941 | 0.95448 | | ATs, two-tone | 66.414 | 64.602 | +1.812 | 1.02805 | | ATs, monotone | 61.687 | 64.602 | -2.915 | 0.95488 | | ATs, paired | 68.762 | 64.602 | +4.160 | 1.06439 | | K9o, all flops | 33.758 | 57.812 | -24.054 | 0.58393 | | K9o, rainbow, ten or higher | 33.554 | 57.812 | -24.258 | 0.58040 | | K9o, rainbow, nine or lower | 38.339 | 57.812 | -19.473 | 0.66317 | | K9o, two-tone | 33.586 | 57.812 | -24.226 | 0.58095 | | K9o, monotone | 38.313 | 57.812 | -19.499 | 0.66272 | | K9o, paired | 31.238 | 57.812 | -26.574 | 0.54034 | ## Does a shared suit matter? Two kinds of deal exist here. In 24 of them the hands share a suit and ATs holds 66.02%. In 24 they do not, and it holds 66.46%. ATs does better with no shared suit, by 0.44 points. **ATs against K9o by suit overlap, in percent** | Deals | Specific deals | Share of deals | ATs wins | Ties | K9o wins | ATs equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 24 | 50.00 | 65.775 | 0.491 | 33.734 | 66.021 | | No shared suit | 24 | 50.00 | 66.258 | 0.410 | 33.332 | 66.463 | ## How often this matchup comes up Out of 1,624,350 ways to deal two seats two cards each, 48 are ATs in one seat and K9o in the other (0.0030%); with the seats swapped too, 96 (0.0059%). ## A worked example A $100 all-in from each player makes a $200 pot, and the exact equity says ATs gets $132.48 of it on average and K9o gets $67.52. Per 1,000 deals: ATs wins about 660, K9o wins about 335, and about 5 end in a split pot. ## The same matchup from the other side The reversed view, K9o against ATs, shows 33.76% for K9o and 66.24% for ATs. It is the same count, so it redirects here. ## Keep exploring Try AsTs against Kh9d 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 AsTs against Kh9d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsTs&p2=Kh9d) - [ATs combos](https://georgelipoker.com/combos/ats.md) - [K9o combos](https://georgelipoker.com/combos/k9o.md) - [ATs vs Q9s](https://georgelipoker.com/equity/ats-vs-q9s.md) - [ATs vs JTs](https://georgelipoker.com/equity/ats-vs-jts.md) - [AQo vs K9o](https://georgelipoker.com/equity/aqo-vs-k9o.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed This is an exact count with no sampling. For the 48 ways to deal one ATs and one K9o without reusing a card, grouped by suit pattern, every one of the 1,712,304 possible boards is dealt and both seven-card hands are compared. A tie counts as half a win in the equity column, and each board is counted once under each of its ten three-card flops. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [ATs vs Q9s: preflop equity](https://georgelipoker.com/equity/ats-vs-q9s.md) - [ATs vs JTs: preflop equity](https://georgelipoker.com/equity/ats-vs-jts.md) - [AQo vs K9o: preflop equity](https://georgelipoker.com/equity/aqo-vs-k9o.md)