--- title: "ATo vs 87s: preflop equity" url: "https://georgelipoker.com/equity/ato-vs-87s.md" canonical_url: "https://georgelipoker.com/equity/ato-vs-87s" last_updated: "2026-10-23" type: "reference" summary: "Who is ahead, ATo or 87s? ATo leads 59.18% to 40.82% before the flop, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/ato-vs-86s.md", "https://georgelipoker.com/equity/ato-vs-76s.md", "https://georgelipoker.com/equity/kjs-vs-87s.md"] --- # ATo vs 87s: preflop equity Who is ahead, ATo or 87s? ATo leads 59.18% to 40.82% before the flop, counted exactly over every board, with the split by flop type and suit. If ATo and 87s get all the chips in before the flop, ATo owns 59.18% of the pot in the long run and 87s owns 40.82%. ## ATo against 87s: the numbers **Exact preflop results for ATo against 87s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | ATo | 58.979 | 0.404 | 40.617 | 59.181 | | 87s | 40.617 | 0.404 | 58.979 | 40.819 | We compare an offsuit hand with a suited hand. Neither hand shares a rank with the other, so this is a contest of high cards, connection and suits. The lead is steady rather than large, and the flop still has plenty of say in who wins. 0.40% of boards are ties, so the equity of each hand is its win rate plus half of that. For context, ATo sits at number 19 of 169 starting hands and 87s at number 100 when each is run against a random hand. **Boards behind the percentages: 82,190,592 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | ATo | 48,475,000 | 332,000 | 33,383,000 | | 87s | 33,383,000 | 332,000 | 48,475,000 | 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. **ATo against 87s 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 | 1.450 | 1.696 | 2.462 | 0.690 | | 87s | 0.690 | 2.462 | 1.696 | 1.450 | 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 The flop changes the picture. ATo does best on rainbow flops topped by a ten or better, at 66.37%, and worst on low rainbow flops (nine high or lower), at 36.05%. On low rainbow flops (nine high or lower) the numbers flip and 87s is the one ahead. **ATo against 87s by flop texture, in percent** | Flop | Share of flops | ATo wins | Ties | 87s wins | ATo equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.717 | 66.275 | 0.194 | 33.531 | 66.372 | | Rainbow, nine or lower | 6.313 | 35.864 | 0.362 | 63.774 | 36.045 | | Two-tone | 46.667 | 57.395 | 0.216 | 42.389 | 57.503 | | Monotone | 5.212 | 56.431 | 2.343 | 41.226 | 57.603 | | Paired | 17.091 | 62.071 | 0.645 | 37.284 | 62.393 | 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 Relative to a random opponent, ATo changes by -3.54 points (baseline 62.72%) and 87s by -7.12 points (baseline 47.94%). **ATo and 87s 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 | 59.181 | 62.722 | -3.541 | 0.94354 | | ATo, rainbow, ten or higher | 66.372 | 62.722 | +3.650 | 1.05819 | | ATo, rainbow, nine or lower | 36.045 | 62.722 | -26.677 | 0.57468 | | ATo, two-tone | 57.503 | 62.722 | -5.219 | 0.91679 | | ATo, monotone | 57.603 | 62.722 | -5.119 | 0.91839 | | ATo, paired | 62.393 | 62.722 | -0.329 | 0.99475 | | 87s, all flops | 40.819 | 47.936 | -7.117 | 0.85153 | | 87s, rainbow, ten or higher | 33.628 | 47.936 | -14.308 | 0.70152 | | 87s, rainbow, nine or lower | 63.955 | 47.936 | +16.019 | 1.33417 | | 87s, two-tone | 42.497 | 47.936 | -5.439 | 0.88654 | | 87s, monotone | 42.397 | 47.936 | -5.539 | 0.88445 | | 87s, paired | 37.607 | 47.936 | -10.329 | 0.78453 | ## Does a shared suit matter? The suit split reads 59.84% for ATo with a shared suit and 58.52% without one. ATo does better with a shared suit, by 1.32 points. **ATo against 87s by suit overlap, in percent** | Deals | Specific deals | Share of deals | ATo wins | Ties | 87s wins | ATo equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 24 | 50.00 | 59.620 | 0.445 | 39.935 | 59.842 | | No shared suit | 24 | 50.00 | 58.339 | 0.362 | 41.299 | 58.520 | ## How often this matchup comes up This page stands for 48 specific-card matchups (0.0030% of 1,624,350 ordered deals), or 96 once you count the seats both ways (0.0059%). ## A worked example A $100 all-in from each player makes a $200 pot, and the exact equity says ATo gets $118.36 of it on average and 87s gets $81.64. Per 1,000 deals: ATo wins about 590, 87s wins about 406, and about 4 end in a split pot. ## The same matchup from the other side Read it from the other side: 87s against ATo is the same matchup with the numbers swapped, so 87s holds 40.82% and ATo holds 59.18%. That address sends you back to this page. ## Keep exploring Open the calculator with AsTh against 8d7d already entered, a deal with no shared suit, and change any card to try your own hand. The matchups after it each swap one hand for a nearby one in the ranking. - [Open AsTh against 8d7d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsTh&p2=8d7d) - [ATo combos](https://georgelipoker.com/combos/ato.md) - [87s combos](https://georgelipoker.com/combos/87s.md) - [ATo vs 86s](https://georgelipoker.com/equity/ato-vs-86s.md) - [ATo vs 76s](https://georgelipoker.com/equity/ato-vs-76s.md) - [KJs vs 87s](https://georgelipoker.com/equity/kjs-vs-87s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Nothing here is simulated. The 48 deals of ATo against 87s 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 - [ATo vs 86s: preflop equity](https://georgelipoker.com/equity/ato-vs-86s.md) - [ATo vs 76s: preflop equity](https://georgelipoker.com/equity/ato-vs-76s.md) - [KJs vs 87s: preflop equity](https://georgelipoker.com/equity/kjs-vs-87s.md)