--- title: "A9o vs T9o: preflop equity" url: "https://georgelipoker.com/equity/a9o-vs-t9o.md" canonical_url: "https://georgelipoker.com/equity/a9o-vs-t9o" last_updated: "2026-10-23" type: "reference" summary: "A9o is a big favorite over T9o before the flop: 69.33% to 30.67% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/a9o-vs-98s.md", "https://georgelipoker.com/equity/a9o-vs-22.md", "https://georgelipoker.com/equity/kjo-vs-t9o.md"] --- # A9o vs T9o: preflop equity A9o is a big favorite over T9o before the flop: 69.33% to 30.67% 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, A9o finishes with 69.33% of the pot and T9o with 30.67%. ## A9o against T9o: the numbers **Exact preflop results for A9o against T9o, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | A9o | 68.429 | 1.799 | 29.772 | 69.329 | | T9o | 29.772 | 1.799 | 68.429 | 30.671 | A9o meets T9o, and both are offsuit hands. Sharing a rank is the signature of a dominated hand, since the weaker hand is usually out-kicked when the shared rank shows up. That is a clear edge, 69.33% to 30.67%, but T9o still wins often enough that one hand proves nothing. Split pots make up 1.80% of the boards, and both equity figures count them as half a win each. In the ranking of all 169 starting hands, A9o is number 25 and T9o is number 78. **Boards behind the percentages: 184,928,832 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | A9o | 126,545,000 | 3,327,000 | 55,057,000 | | T9o | 55,057,000 | 3,327,000 | 126,545,000 | 108 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. **A9o against T9o read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | A9o | 2.260 | 1.461 | 3.359 | 0.442 | | T9o | 0.442 | 3.359 | 1.461 | 2.260 | The final column gives the least the pot must offer for each unit called for a call to break even at this equity. ## Who is ahead on which flops If you know the kind of flop that came, the numbers shift: A9o holds 77.87% on low rainbow flops (nine high or lower) and 64.69% on monotone flops. A9o stays ahead on all five textures. **A9o against T9o by flop texture, in percent** | Flop | Share of flops | A9o wins | Ties | T9o wins | A9o equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.731 | 65.568 | 1.657 | 32.775 | 66.397 | | Rainbow, nine or lower | 6.314 | 76.939 | 1.862 | 21.199 | 77.870 | | Two-tone | 46.477 | 67.466 | 1.635 | 30.899 | 68.284 | | Monotone | 5.144 | 63.433 | 2.519 | 34.048 | 64.693 | | Paired | 17.334 | 73.477 | 2.204 | 24.319 | 74.579 | 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 Each hand has a baseline against a random hand: 60.77% for A9o, 51.53% for T9o. Here the change is +8.56 and -20.86 points. **A9o and T9o 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 | | --- | --- | --- | --- | --- | | A9o, all flops | 69.329 | 60.773 | +8.556 | 1.14079 | | A9o, rainbow, ten or higher | 66.397 | 60.773 | +5.624 | 1.09254 | | A9o, rainbow, nine or lower | 77.870 | 60.773 | +17.097 | 1.28133 | | A9o, two-tone | 68.284 | 60.773 | +7.511 | 1.12359 | | A9o, monotone | 64.693 | 60.773 | +3.920 | 1.06450 | | A9o, paired | 74.579 | 60.773 | +13.806 | 1.22717 | | T9o, all flops | 30.671 | 51.532 | -20.861 | 0.59518 | | T9o, rainbow, ten or higher | 33.603 | 51.532 | -17.929 | 0.65208 | | T9o, rainbow, nine or lower | 22.130 | 51.532 | -29.402 | 0.42944 | | T9o, two-tone | 31.716 | 51.532 | -19.816 | 0.61546 | | T9o, monotone | 35.307 | 51.532 | -16.225 | 0.68515 | | T9o, paired | 25.421 | 51.532 | -26.111 | 0.49331 | ## Does a shared suit matter? Does suit overlap move the numbers? A9o has 69.41% when the hands share a suit and 69.04% when they do not. A9o does better with a shared suit, by 0.37 points. **A9o against T9o by suit overlap, in percent** | Deals | Specific deals | Share of deals | A9o wins | Ties | T9o wins | A9o equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 84 | 77.78 | 68.500 | 1.824 | 29.676 | 69.412 | | No shared suit | 24 | 22.22 | 68.181 | 1.712 | 30.107 | 69.037 | ## How often this matchup comes up The class pair covers 108 combinations of specific cards in a fixed seat order, 0.0066% of 1,624,350, and 216 (0.0133%) in either order. ## A worked example Worked example: both players commit $100, so $200 sits in the middle. Over every board, A9o's average share is $138.66 (a gain of $38.66) and T9o's is $61.34 (a loss of $38.66). A thousand deals look like this: A9o takes 684, T9o takes 298, 18 are ties. ## The same matchup from the other side The mirror image, T9o against A9o, is 30.67% to 69.33%, and its address redirects to this page. ## Keep exploring Try As9h against Td9c 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 As9h against Td9c in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=As9h&p2=Td9c) - [A9o combos](https://georgelipoker.com/combos/a9o.md) - [T9o combos](https://georgelipoker.com/combos/t9o.md) - [A9o vs 98s](https://georgelipoker.com/equity/a9o-vs-98s.md) - [A9o vs 22](https://georgelipoker.com/equity/a9o-vs-22.md) - [KJo vs T9o](https://georgelipoker.com/equity/kjo-vs-t9o.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Nothing here is simulated. The 108 deals of A9o against T9o 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 - [A9o vs 98s: preflop equity](https://georgelipoker.com/equity/a9o-vs-98s.md) - [A9o vs 22: preflop equity](https://georgelipoker.com/equity/a9o-vs-22.md) - [KJo vs T9o: preflop equity](https://georgelipoker.com/equity/kjo-vs-t9o.md)