--- title: "AA vs A2s: preflop equity" url: "https://georgelipoker.com/equity/aa-vs-a2s.md" canonical_url: "https://georgelipoker.com/equity/aa-vs-a2s" last_updated: "2026-10-23" type: "reference" summary: "AA is a big favorite over A2s before the flop: 87.89% to 12.11% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/aa-vs-qto.md", "https://georgelipoker.com/equity/aa-vs-44.md", "https://georgelipoker.com/equity/kk-vs-a2s.md"] --- # AA vs A2s: preflop equity AA is a big favorite over A2s before the flop: 87.89% to 12.11% equity, counted exactly over every board, with the split by flop type and suit. If AA and A2s get all the chips in before the flop, AA owns 87.89% of the pot in the long run and A2s owns 12.11%. ## AA against A2s: the numbers **Exact preflop results for AA against A2s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | AA | 87.239 | 1.308 | 11.453 | 87.893 | | A2s | 11.453 | 1.308 | 87.239 | 12.107 | The first hand is a pocket pair; the second is a suited hand. The non-pair hand shares a rank with the pair, so two of its outs for pairing are blocked by the pair itself. This is one of the lopsided matchups: A2s wins only 11.45% of the boards outright. 1.31% of boards are ties, so the equity of each hand is its win rate plus half of that. By strength against a random hand, AA holds place 1 of 169 and A2s holds place 46. **Boards behind the percentages: 20,547,648 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | AA | 17,926,000 | 269,000 | 2,353,000 | | A2s | 2,353,000 | 269,000 | 17,926,000 | The total is exact: 12 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. **AA against A2s read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | AA | 7.260 | 1.146 | 8.731 | 0.138 | | A2s | 0.138 | 8.731 | 1.146 | 7.260 | The last column is the smallest pot odds, written as a pot-to-call ratio, at which a call breaks even with this equity. ## Who is ahead on which flops Split by what the flop looks like, AA peaks at 92.84% on rainbow flops topped by a ten or better and bottoms out at 77.68% on monotone flops. AA stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **AA against A2s by flop texture, in percent** | Flop | Share of flops | AA wins | Ties | A2s wins | AA equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.740 | 92.233 | 1.220 | 6.547 | 92.843 | | Rainbow, nine or lower | 7.042 | 85.796 | 2.615 | 11.589 | 87.103 | | Two-tone | 46.236 | 85.789 | 1.387 | 12.824 | 86.483 | | Monotone | 5.151 | 76.490 | 2.376 | 21.134 | 77.678 | | Paired | 17.831 | 88.027 | 0.393 | 11.580 | 88.223 | 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 AA from 85.20% by +2.69 points and A2s from 57.38% by -45.27 points. **AA and A2s 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 | | --- | --- | --- | --- | --- | | AA, all flops | 87.893 | 85.204 | +2.689 | 1.03156 | | AA, rainbow, ten or higher | 92.843 | 85.204 | +7.639 | 1.08966 | | AA, rainbow, nine or lower | 87.103 | 85.204 | +1.899 | 1.02229 | | AA, two-tone | 86.483 | 85.204 | +1.279 | 1.01501 | | AA, monotone | 77.678 | 85.204 | -7.526 | 0.91167 | | AA, paired | 88.223 | 85.204 | +3.019 | 1.03543 | | A2s, all flops | 12.107 | 57.379 | -45.272 | 0.21100 | | A2s, rainbow, ten or higher | 7.157 | 57.379 | -50.222 | 0.12473 | | A2s, rainbow, nine or lower | 12.897 | 57.379 | -44.482 | 0.22477 | | A2s, two-tone | 13.517 | 57.379 | -43.862 | 0.23557 | | A2s, monotone | 22.322 | 57.379 | -35.057 | 0.38903 | | A2s, paired | 11.777 | 57.379 | -45.602 | 0.20525 | ## Does a shared suit matter? There is no shared-suit case for this pair, since the cards they would need are already in the other hand. Every deal is a no-shared-suit deal. **AA against A2s by suit overlap, in percent** | Deals | Specific deals | Share of deals | AA wins | Ties | A2s wins | AA equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 0 | 0.00 | not possible | not possible | not possible | not possible | | No shared suit | 12 | 100.00 | 87.239 | 1.308 | 11.453 | 87.893 | ## How often this matchup comes up Out of 1,624,350 ways to deal two seats two cards each, 12 are AA in one seat and A2s in the other (0.0007%); with the seats swapped too, 24 (0.0015%). ## A worked example To see what the equity is worth, imagine $100 each in a $200 pot. AA is worth $175.78 on average (+$75.78); A2s is worth $24.22 (-$75.78). In 1,000 deals of exactly this matchup, expect about 872 won outright by AA, about 115 won outright by A2s and about 13 split. ## The same matchup from the other side The reversed view, A2s against AA, shows 12.11% for A2s and 87.89% for AA. It is the same count, so it redirects here. ## Keep exploring Try AsAh against Ad2d 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 AsAh against Ad2d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsAh&p2=Ad2d) - [AA combos](https://georgelipoker.com/combos/aa.md) - [A2s combos](https://georgelipoker.com/combos/a2s.md) - [AA vs QTo](https://georgelipoker.com/equity/aa-vs-qto.md) - [AA vs 44](https://georgelipoker.com/equity/aa-vs-44.md) - [KK vs A2s](https://georgelipoker.com/equity/kk-vs-a2s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed We counted every case. Each suit pattern of the 12 specific AA against A2s deals meets all 1,712,304 boards, and the better five-card hand wins; a split pot is half a win each. The flop table reads each board under all ten of its three-card flops. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [AA vs QTo: preflop equity](https://georgelipoker.com/equity/aa-vs-qto.md) - [AA vs 44: preflop equity](https://georgelipoker.com/equity/aa-vs-44.md) - [KK vs A2s: preflop equity](https://georgelipoker.com/equity/kk-vs-a2s.md)