--- title: "A8s vs T9o: preflop equity" url: "https://georgelipoker.com/equity/a8s-vs-t9o.md" canonical_url: "https://georgelipoker.com/equity/a8s-vs-t9o" last_updated: "2026-10-23" type: "reference" summary: "Who is ahead, A8s or T9o? A8s leads 58.61% to 41.39% before the flop, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/a8s-vs-98s.md", "https://georgelipoker.com/equity/a8s-vs-22.md", "https://georgelipoker.com/equity/kts-vs-t9o.md"] --- # A8s vs T9o: preflop equity Who is ahead, A8s or T9o? A8s leads 58.61% to 41.39% before the flop, counted exactly over every board, with the split by flop type and suit. Over all 1,712,304 boards that can follow this deal, A8s finishes with 58.61% of the pot and T9o with 41.39%. ## A8s against T9o: the numbers **Exact preflop results for A8s against T9o, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | A8s | 58.405 | 0.417 | 41.178 | 58.613 | | T9o | 41.178 | 0.417 | 58.405 | 41.387 | A8s is a suited hand and T9o is an offsuit hand. With no overlap in ranks, every card that pairs one hand is a card that does not pair the other. The lead is steady rather than large, and the flop still has plenty of say in who wins. The tie share is 0.42%: on those boards the pot is chopped and neither hand wins outright. The hand ranking puts A8s at 21 and T9o at 78 out of 169 starting hands. **Boards behind the percentages: 82,190,592 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | A8s | 48,003,000 | 343,000 | 33,844,000 | | T9o | 33,844,000 | 343,000 | 48,003,000 | 48 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. **A8s 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) | | --- | --- | --- | --- | --- | | A8s | 1.416 | 1.712 | 2.428 | 0.706 | | T9o | 0.706 | 2.428 | 1.712 | 1.416 | 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, A8s peaks at 64.26% on paired flops and bottoms out at 54.52% on low rainbow flops (nine high or lower). A8s stays ahead on all five textures. **A8s against T9o by flop texture, in percent** | Flop | Share of flops | A8s wins | Ties | T9o wins | A8s equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.665 | 57.063 | 0.184 | 42.753 | 57.155 | | Rainbow, nine or lower | 6.365 | 54.263 | 0.514 | 45.223 | 54.520 | | Two-tone | 46.667 | 58.112 | 0.232 | 41.656 | 58.228 | | Monotone | 5.212 | 54.299 | 2.343 | 43.358 | 55.471 | | Paired | 17.091 | 63.936 | 0.637 | 35.427 | 64.255 | 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 Compared with a random opponent, this matchup shifts A8s from 61.94% by -3.33 points and T9o from 51.53% by -10.14 points. **A8s 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 | | --- | --- | --- | --- | --- | | A8s, all flops | 58.613 | 61.944 | -3.331 | 0.94623 | | A8s, rainbow, ten or higher | 57.155 | 61.944 | -4.789 | 0.92269 | | A8s, rainbow, nine or lower | 54.520 | 61.944 | -7.424 | 0.88015 | | A8s, two-tone | 58.228 | 61.944 | -3.716 | 0.94001 | | A8s, monotone | 55.471 | 61.944 | -6.473 | 0.89550 | | A8s, paired | 64.255 | 61.944 | +2.311 | 1.03731 | | T9o, all flops | 41.387 | 51.532 | -10.145 | 0.80313 | | T9o, rainbow, ten or higher | 42.845 | 51.532 | -8.687 | 0.83143 | | T9o, rainbow, nine or lower | 45.480 | 51.532 | -6.052 | 0.88256 | | T9o, two-tone | 41.772 | 51.532 | -9.760 | 0.81060 | | T9o, monotone | 44.529 | 51.532 | -7.003 | 0.86410 | | T9o, paired | 35.745 | 51.532 | -15.787 | 0.69365 | ## Does a shared suit matter? Split by suits, the deals give A8s 58.29% when the hands overlap in a suit and 58.94% when they do not. A8s does better with no shared suit, by 0.65 points. **A8s against T9o by suit overlap, in percent** | Deals | Specific deals | Share of deals | A8s wins | Ties | T9o wins | A8s equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 24 | 50.00 | 58.056 | 0.459 | 41.485 | 58.285 | | No shared suit | 24 | 50.00 | 58.753 | 0.376 | 40.871 | 58.941 | ## 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 Put $100 each into a $200 pot and deal every board once: A8s averages $117.22 back, ahead of its $100 by $17.22, while T9o averages $82.78, short of its $100 by $17.22. Out of 1,000 deals you should see around 584 outright wins for A8s, 412 for T9o, and 4 split pots. ## The same matchup from the other side The reversed view, T9o against A8s, shows 41.39% for T9o and 58.61% for A8s. It is the same count, so it redirects here. ## Keep exploring Try As8s against Th9d 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 As8s against Th9d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=As8s&p2=Th9d) - [A8s combos](https://georgelipoker.com/combos/a8s.md) - [T9o combos](https://georgelipoker.com/combos/t9o.md) - [A8s vs 98s](https://georgelipoker.com/equity/a8s-vs-98s.md) - [A8s vs 22](https://georgelipoker.com/equity/a8s-vs-22.md) - [KTs vs T9o](https://georgelipoker.com/equity/kts-vs-t9o.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Method: exact enumeration. The 48 specific deals are grouped by suit pattern, each is run against all 1,712,304 boards, and both seven-card hands are scored. Equity adds half of every tie, and flop textures are tallied over the ten flops inside each board. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [A8s vs 98s: preflop equity](https://georgelipoker.com/equity/a8s-vs-98s.md) - [A8s vs 22: preflop equity](https://georgelipoker.com/equity/a8s-vs-22.md) - [KTs vs T9o: preflop equity](https://georgelipoker.com/equity/kts-vs-t9o.md)