--- title: "ATo vs T8s: preflop equity" url: "https://georgelipoker.com/equity/ato-vs-t8s.md" canonical_url: "https://georgelipoker.com/equity/ato-vs-t8s" last_updated: "2026-10-23" type: "reference" summary: "ATo is a big favorite over T8s before the flop: 67.64% to 32.36% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/ato-vs-t9o.md", "https://georgelipoker.com/equity/ato-vs-98s.md", "https://georgelipoker.com/equity/kjs-vs-t8s.md"] --- # ATo vs T8s: preflop equity ATo is a big favorite over T8s before the flop: 67.64% to 32.36% equity, counted exactly over every board, with the split by flop type and suit. The exact count puts ATo at 67.64% and T8s at 32.36% when the two hands see all five board cards. ## ATo against T8s: the numbers **Exact preflop results for ATo against T8s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | ATo | 66.570 | 2.142 | 31.288 | 67.641 | | T8s | 31.288 | 2.142 | 66.570 | 32.359 | We compare an offsuit hand with a suited hand. Because the hands share one rank, the one with the higher kicker is ahead when that rank pairs and the other hand is mostly drawing. That is a clear edge, 67.64% to 32.36%, but T8s still wins often enough that one hand proves nothing. Of every 100 boards, about 2.14 are split pots, and the equity figures already include them. In the ranking of all 169 starting hands, ATo is number 19 and T8s is number 73. **Boards behind the percentages: 61,642,944 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | ATo | 41,036,000 | 1,320,000 | 19,287,000 | | T8s | 19,287,000 | 1,320,000 | 41,036,000 | 36 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. **ATo against T8s read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | ATo | 2.090 | 1.502 | 3.196 | 0.478 | | T8s | 0.478 | 3.196 | 1.502 | 2.090 | 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 By flop texture, ATo's equity runs from 54.33% on low rainbow flops (nine high or lower) up to 73.14% on rainbow flops topped by a ten or better. ATo stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **ATo against T8s by flop texture, in percent** | Flop | Share of flops | ATo wins | Ties | T8s wins | ATo equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.905 | 72.196 | 1.885 | 25.919 | 73.138 | | Rainbow, nine or lower | 7.042 | 52.929 | 2.797 | 44.274 | 54.328 | | Two-tone | 46.527 | 64.598 | 1.948 | 33.454 | 65.572 | | Monotone | 5.192 | 61.767 | 3.384 | 34.849 | 63.459 | | Paired | 17.334 | 71.084 | 2.382 | 26.534 | 72.275 | Read the flop types this way: rainbow has three suits, two-tone has two cards of one suit, monotone has three, and paired repeats a rank. ## Compared with a random hand The table below sets each hand against its own random-hand baseline: a change of +4.92 points for ATo, from 62.72%, and -19.97 for T8s, from 52.33%. **ATo and T8s 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 | | --- | --- | --- | --- | --- | | ATo, all flops | 67.641 | 62.722 | +4.919 | 1.07843 | | ATo, rainbow, ten or higher | 73.138 | 62.722 | +10.416 | 1.16607 | | ATo, rainbow, nine or lower | 54.328 | 62.722 | -8.394 | 0.86617 | | ATo, two-tone | 65.572 | 62.722 | +2.850 | 1.04544 | | ATo, monotone | 63.459 | 62.722 | +0.737 | 1.01175 | | ATo, paired | 72.275 | 62.722 | +9.553 | 1.15231 | | T8s, all flops | 32.359 | 52.334 | -19.975 | 0.61832 | | T8s, rainbow, ten or higher | 26.862 | 52.334 | -25.472 | 0.51328 | | T8s, rainbow, nine or lower | 45.672 | 52.334 | -6.662 | 0.87270 | | T8s, two-tone | 34.428 | 52.334 | -17.906 | 0.65785 | | T8s, monotone | 36.541 | 52.334 | -15.793 | 0.69823 | | T8s, paired | 27.725 | 52.334 | -24.609 | 0.52977 | ## Does a shared suit matter? Looking only at deals where the hands share a suit, ATo has 68.69%; looking only at deals where they do not, 67.12%. ATo does better with a shared suit, by 1.57 points. **ATo against T8s by suit overlap, in percent** | Deals | Specific deals | Share of deals | ATo wins | Ties | T8s wins | ATo equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 33.33 | 67.577 | 2.232 | 30.191 | 68.693 | | No shared suit | 24 | 66.67 | 66.066 | 2.098 | 31.836 | 67.115 | ## How often this matchup comes up Out of 1,624,350 ways to deal two seats two cards each, 36 are ATo in one seat and T8s in the other (0.0022%); with the seats swapped too, 72 (0.0044%). ## A worked example Put $100 each into a $200 pot and deal every board once: ATo averages $135.28 back, ahead of its $100 by $35.28, while T8s averages $64.72, short of its $100 by $35.28. Run 1,000 deals and the tally comes out near 666 for ATo, 313 for T8s and 21 ties. ## The same matchup from the other side One page covers both views. From T8s' side the equity is 32.36%, and from ATo's side it is 67.64%. ## Keep exploring Try AsTh against Td8d 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 AsTh against Td8d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsTh&p2=Td8d) - [ATo combos](https://georgelipoker.com/combos/ato.md) - [T8s combos](https://georgelipoker.com/combos/t8s.md) - [ATo vs T9o](https://georgelipoker.com/equity/ato-vs-t9o.md) - [ATo vs 98s](https://georgelipoker.com/equity/ato-vs-98s.md) - [KJs vs T8s](https://georgelipoker.com/equity/kjs-vs-t8s.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 ATo against T8s, 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 - [ATo vs T9o: preflop equity](https://georgelipoker.com/equity/ato-vs-t9o.md) - [ATo vs 98s: preflop equity](https://georgelipoker.com/equity/ato-vs-98s.md) - [KJs vs T8s: preflop equity](https://georgelipoker.com/equity/kjs-vs-t8s.md)