--- title: "ATs vs 87s: preflop equity" url: "https://georgelipoker.com/equity/ats-vs-87s.md" canonical_url: "https://georgelipoker.com/equity/ats-vs-87s" last_updated: "2026-10-23" type: "reference" summary: "ATs is a big favorite over 87s before the flop: 61.70% to 38.30% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/ats-vs-86s.md", "https://georgelipoker.com/equity/ats-vs-76s.md", "https://georgelipoker.com/equity/aqo-vs-87s.md"] --- # ATs vs 87s: preflop equity ATs is a big favorite over 87s before the flop: 61.70% to 38.30% equity, counted exactly over every board, with the split by flop type and suit. Counting every board, the equity split is 61.70% for ATs and 38.30% for 87s, so ATs leads by 23.40 points. ## ATs against 87s: the numbers **Exact preflop results for ATs against 87s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | ATs | 61.477 | 0.454 | 38.069 | 61.704 | | 87s | 38.069 | 0.454 | 61.477 | 38.296 | ATs and 87s are both suited hands. Neither hand shares a rank with the other, so this is a contest of high cards, connection and suits. A 23.40 point lead is real, and 87s still takes about 381 of every 1,000 deals outright. The tie share is 0.45%: on those boards the pot is chopped and neither hand wins outright. By strength against a random hand, ATs holds place 13 of 169 and 87s holds place 100. **Boards behind the percentages: 27,396,864 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | ATs | 16,843,000 | 124,000 | 10,430,000 | | 87s | 10,430,000 | 124,000 | 16,843,000 | The board total is exact, 16 deals at 1,712,304 boards each. Won, tied and lost counts are rounded to the nearest thousand from the five-decimal percentages. **ATs 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) | | --- | --- | --- | --- | --- | | ATs | 1.611 | 1.627 | 2.627 | 0.621 | | 87s | 0.621 | 2.627 | 1.627 | 1.611 | The last column is the break-even price: the pot odds a call needs to offer, as a ratio of pot to call. ## Who is ahead on which flops ATs prefers rainbow flops topped by a ten or better, where it holds 67.73%, and likes low rainbow flops (nine high or lower) least, where it holds 38.45%. Low rainbow flops (nine high or lower) favor 87s, the hand that is behind overall. **ATs against 87s by flop texture, in percent** | Flop | Share of flops | ATs wins | Ties | 87s wins | ATs equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.595 | 67.634 | 0.187 | 32.179 | 67.727 | | Rainbow, nine or lower | 6.314 | 38.274 | 0.353 | 61.373 | 38.451 | | Two-tone | 46.727 | 60.827 | 0.206 | 38.967 | 60.930 | | Monotone | 5.273 | 57.289 | 3.389 | 39.322 | 58.983 | | Paired | 17.091 | 64.257 | 0.645 | 35.098 | 64.580 | 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 Against one random hand instead, ATs holds 64.60% and 87s holds 47.94%. Facing each other changes that by -2.90 points for ATs and -9.64 points for 87s. **ATs 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 | | --- | --- | --- | --- | --- | | ATs, all flops | 61.704 | 64.602 | -2.898 | 0.95514 | | ATs, rainbow, ten or higher | 67.727 | 64.602 | +3.125 | 1.04837 | | ATs, rainbow, nine or lower | 38.451 | 64.602 | -26.151 | 0.59520 | | ATs, two-tone | 60.930 | 64.602 | -3.672 | 0.94316 | | ATs, monotone | 58.983 | 64.602 | -5.619 | 0.91302 | | ATs, paired | 64.580 | 64.602 | -0.022 | 0.99966 | | 87s, all flops | 38.296 | 47.936 | -9.640 | 0.79890 | | 87s, rainbow, ten or higher | 32.273 | 47.936 | -15.663 | 0.67325 | | 87s, rainbow, nine or lower | 61.549 | 47.936 | +13.613 | 1.28398 | | 87s, two-tone | 39.070 | 47.936 | -8.866 | 0.81505 | | 87s, monotone | 41.017 | 47.936 | -6.919 | 0.85566 | | 87s, paired | 35.420 | 47.936 | -12.516 | 0.73890 | ## Does a shared suit matter? Split by suits, the deals give ATs 63.93% when the hands overlap in a suit and 60.96% when they do not. ATs does better with a shared suit, by 2.97 points. **ATs against 87s by suit overlap, in percent** | Deals | Specific deals | Share of deals | ATs wins | Ties | 87s wins | ATs equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 4 | 25.00 | 63.664 | 0.527 | 35.809 | 63.928 | | No shared suit | 12 | 75.00 | 60.748 | 0.429 | 38.823 | 60.962 | ## How often this matchup comes up This page stands for 16 specific-card matchups (0.0010% of 1,624,350 ordered deals), or 32 once you count the seats both ways (0.0020%). ## A worked example Take a $200 pot built from $100 each. ATs' equity of 61.70% is worth $123.40, a $23.40 edge, and 87s' 38.30% is worth $76.60, which is $23.40 under its stake. Over a long run, 1,000 deals split into about 615 for ATs, 381 for 87s and 4 tied. ## The same matchup from the other side One page covers both views. From 87s' side the equity is 38.30%, and from ATs' side it is 61.70%. ## Keep exploring Try AsTs against 8h7h 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 8h7h in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsTs&p2=8h7h) - [ATs combos](https://georgelipoker.com/combos/ats.md) - [87s combos](https://georgelipoker.com/combos/87s.md) - [ATs vs 86s](https://georgelipoker.com/equity/ats-vs-86s.md) - [ATs vs 76s](https://georgelipoker.com/equity/ats-vs-76s.md) - [AQo vs 87s](https://georgelipoker.com/equity/aqo-vs-87s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Method: exact enumeration. The 16 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 - [ATs vs 86s: preflop equity](https://georgelipoker.com/equity/ats-vs-86s.md) - [ATs vs 76s: preflop equity](https://georgelipoker.com/equity/ats-vs-76s.md) - [AQo vs 87s: preflop equity](https://georgelipoker.com/equity/aqo-vs-87s.md)