--- title: "ATs vs T9o: preflop equity" url: "https://georgelipoker.com/equity/ats-vs-t9o.md" canonical_url: "https://georgelipoker.com/equity/ats-vs-t9o" last_updated: "2026-10-23" type: "reference" summary: "ATs is a big favorite over T9o before the flop: 73.14% to 26.86% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/ats-vs-98s.md", "https://georgelipoker.com/equity/ats-vs-22.md", "https://georgelipoker.com/equity/aqo-vs-t9o.md"] --- # ATs vs T9o: preflop equity ATs is a big favorite over T9o before the flop: 73.14% to 26.86% equity, counted exactly over every board, with the split by flop type and suit. Counting every board, the equity split is 73.14% for ATs and 26.86% for T9o, so ATs leads by 46.28 points. ## ATs against T9o: the numbers **Exact preflop results for ATs against T9o, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | ATs | 72.078 | 2.129 | 25.793 | 73.142 | | T9o | 25.793 | 2.129 | 72.078 | 26.858 | The matchup pits a suited hand against an offsuit hand. 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, 73.14% to 26.86%, but T9o still wins often enough that one hand proves nothing. Ties are 2.13% of the outcomes here; each tied board gives both hands half the pot. In the ranking of all 169 starting hands, ATs is number 13 and T9o is number 78. **Boards behind the percentages: 61,642,944 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | ATs | 44,431,000 | 1,312,000 | 15,900,000 | | T9o | 15,900,000 | 1,312,000 | 44,431,000 | The total is exact: 36 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 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) | | --- | --- | --- | --- | --- | | ATs | 2.723 | 1.387 | 3.877 | 0.367 | | T9o | 0.367 | 3.877 | 1.387 | 2.723 | 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 Paired flops are the best for ATs (77.32%); low rainbow flops (nine high or lower) are the worst (59.01%). ATs stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **ATs against T9o by flop texture, in percent** | Flop | Share of flops | ATs wins | Ties | T9o wins | ATs equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.905 | 75.465 | 1.880 | 22.655 | 76.405 | | Rainbow, nine or lower | 7.042 | 57.591 | 2.840 | 39.569 | 59.011 | | Two-tone | 46.527 | 71.897 | 1.927 | 26.176 | 72.860 | | Monotone | 5.192 | 64.186 | 3.336 | 32.478 | 65.854 | | Paired | 17.334 | 76.140 | 2.364 | 21.496 | 77.322 | A rainbow flop shows three suits, a two-tone flop repeats one suit, a monotone flop is a single suit, and a paired flop repeats a rank. ## Compared with a random hand The table below sets each hand against its own random-hand baseline: a change of +8.54 points for ATs, from 64.60%, and -24.67 for T9o, from 51.53%. **ATs 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 | | --- | --- | --- | --- | --- | | ATs, all flops | 73.142 | 64.602 | +8.540 | 1.13219 | | ATs, rainbow, ten or higher | 76.405 | 64.602 | +11.803 | 1.18270 | | ATs, rainbow, nine or lower | 59.011 | 64.602 | -5.591 | 0.91345 | | ATs, two-tone | 72.860 | 64.602 | +8.258 | 1.12783 | | ATs, monotone | 65.854 | 64.602 | +1.252 | 1.01938 | | ATs, paired | 77.322 | 64.602 | +12.720 | 1.19690 | | T9o, all flops | 26.858 | 51.532 | -24.674 | 0.52119 | | T9o, rainbow, ten or higher | 23.595 | 51.532 | -27.937 | 0.45787 | | T9o, rainbow, nine or lower | 40.989 | 51.532 | -10.543 | 0.79541 | | T9o, two-tone | 27.140 | 51.532 | -24.392 | 0.52666 | | T9o, monotone | 34.146 | 51.532 | -17.386 | 0.66262 | | T9o, paired | 22.678 | 51.532 | -28.854 | 0.44008 | ## Does a shared suit matter? Does suit overlap move the numbers? ATs has 72.85% when the hands share a suit and 73.29% when they do not. ATs does better with no shared suit, by 0.44 points. **ATs against T9o by suit overlap, in percent** | Deals | Specific deals | Share of deals | ATs wins | Ties | T9o wins | ATs equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 33.33 | 71.728 | 2.241 | 26.031 | 72.849 | | No shared suit | 24 | 66.67 | 72.252 | 2.073 | 25.675 | 73.289 | ## How often this matchup comes up This page stands for 36 specific-card matchups (0.0022% of 1,624,350 ordered deals), or 72 once you count the seats both ways (0.0044%). ## A worked example Take a $200 pot built from $100 each. ATs' equity of 73.14% is worth $146.28, a $46.28 edge, and T9o's 26.86% is worth $53.72, which is $46.28 under its stake. In 1,000 deals of exactly this matchup, expect about 721 won outright by ATs, about 258 won outright by T9o and about 21 split. ## The same matchup from the other side Swap the hands and you get T9o with 26.86% against ATs with 73.14%. We keep one page per matchup, with the better-ranked hand first. ## Keep exploring Try AsTs 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 AsTs against Th9d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsTs&p2=Th9d) - [ATs combos](https://georgelipoker.com/combos/ats.md) - [T9o combos](https://georgelipoker.com/combos/t9o.md) - [ATs vs 98s](https://georgelipoker.com/equity/ats-vs-98s.md) - [ATs vs 22](https://georgelipoker.com/equity/ats-vs-22.md) - [AQo vs T9o](https://georgelipoker.com/equity/aqo-vs-t9o.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 36 specific deals of ATs against T9o, 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 - [ATs vs 98s: preflop equity](https://georgelipoker.com/equity/ats-vs-98s.md) - [ATs vs 22: preflop equity](https://georgelipoker.com/equity/ats-vs-22.md) - [AQo vs T9o: preflop equity](https://georgelipoker.com/equity/aqo-vs-t9o.md)