--- title: "AA vs A8s: preflop equity" url: "https://georgelipoker.com/equity/aa-vs-a8s.md" canonical_url: "https://georgelipoker.com/equity/aa-vs-a8s" last_updated: "2026-10-23" type: "reference" summary: "AA is a big favorite over A8s before the flop: 88.03% to 11.97% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/aa-vs-kts.md", "https://georgelipoker.com/equity/aa-vs-kqo.md", "https://georgelipoker.com/equity/kk-vs-a8s.md"] --- # AA vs A8s: preflop equity AA is a big favorite over A8s before the flop: 88.03% to 11.97% equity, counted exactly over every board, with the split by flop type and suit. The exact count puts AA at 88.03% and A8s at 11.97% when the two hands see all five board cards. ## AA against A8s: the numbers **Exact preflop results for AA against A8s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | AA | 87.383 | 1.302 | 11.315 | 88.034 | | A8s | 11.315 | 1.302 | 87.383 | 11.966 | AA, a pocket pair, plays A8s, a suited hand. One hand holds a card of the same rank as the pair, which removes a card the pair needs and makes the pair a bigger favorite. AA is a big favorite here before anyone sees a flop. Split pots make up 1.30% of the boards, and both equity figures count them as half a win each. Place 1 of 169 belongs to AA and place 21 belongs to A8s in the ranking against a random hand. **Boards behind the percentages: 20,547,648 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | AA | 17,955,000 | 268,000 | 2,325,000 | | A8s | 2,325,000 | 268,000 | 17,955,000 | Exact total: 12 deals times 1,712,304 boards. The other three counts come from the five-decimal percentages and are rounded to the nearest thousand, so read them as approximate. **AA against A8s 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 | 7.357 | 1.144 | 8.838 | 0.136 | | A8s | 0.136 | 8.838 | 1.144 | 7.357 | 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, AA's equity runs from 77.76% on monotone flops up to 92.47% on rainbow flops topped by a ten or better. AA stays ahead on all five textures. **AA against A8s by flop texture, in percent** | Flop | Share of flops | AA wins | Ties | A8s wins | AA equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.740 | 91.858 | 1.221 | 6.921 | 92.469 | | Rainbow, nine or lower | 7.042 | 87.408 | 2.564 | 10.028 | 88.690 | | Two-tone | 46.236 | 85.877 | 1.372 | 12.751 | 86.563 | | Monotone | 5.151 | 76.583 | 2.351 | 21.066 | 77.759 | | Paired | 17.831 | 88.437 | 0.430 | 11.133 | 88.652 | 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 +2.83 points for AA, from 85.20%, and -49.97 for A8s, from 61.94%. **AA and A8s 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 | 88.034 | 85.204 | +2.830 | 1.03321 | | AA, rainbow, ten or higher | 92.469 | 85.204 | +7.265 | 1.08527 | | AA, rainbow, nine or lower | 88.690 | 85.204 | +3.486 | 1.04091 | | AA, two-tone | 86.563 | 85.204 | +1.359 | 1.01595 | | AA, monotone | 77.759 | 85.204 | -7.445 | 0.91262 | | AA, paired | 88.652 | 85.204 | +3.448 | 1.04047 | | A8s, all flops | 11.966 | 61.944 | -49.978 | 0.19317 | | A8s, rainbow, ten or higher | 7.531 | 61.944 | -54.413 | 0.12158 | | A8s, rainbow, nine or lower | 11.310 | 61.944 | -50.634 | 0.18258 | | A8s, two-tone | 13.437 | 61.944 | -48.507 | 0.21692 | | A8s, monotone | 22.241 | 61.944 | -39.703 | 0.35905 | | A8s, paired | 11.348 | 61.944 | -50.596 | 0.18320 | ## Does a shared suit matter? For this pair the shared-suit row is empty: the two hands cannot both own a card of one suit without reusing a card. **AA against A8s by suit overlap, in percent** | Deals | Specific deals | Share of deals | AA wins | Ties | A8s wins | AA equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 0 | 0.00 | not possible | not possible | not possible | not possible | | No shared suit | 12 | 100.00 | 87.383 | 1.302 | 11.315 | 88.034 | ## How often this matchup comes up Counting specific cards, AA against A8s appears in 12 of the 1,624,350 ordered heads-up deals (0.0007%), and in 24 when the seats are swapped too (0.0015%). ## A worked example A $100 all-in from each player makes a $200 pot, and the exact equity says AA gets $176.06 of it on average and A8s gets $23.94. A thousand deals look like this: AA takes 874, A8s takes 113, 13 are ties. ## The same matchup from the other side The mirror image, A8s against AA, is 11.97% to 88.03%, and its address redirects to this page. ## Keep exploring Open the calculator with AsAh against Ad8d 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 AsAh against Ad8d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsAh&p2=Ad8d) - [AA combos](https://georgelipoker.com/combos/aa.md) - [A8s combos](https://georgelipoker.com/combos/a8s.md) - [AA vs KTs](https://georgelipoker.com/equity/aa-vs-kts.md) - [AA vs KQo](https://georgelipoker.com/equity/aa-vs-kqo.md) - [KK vs A8s](https://georgelipoker.com/equity/kk-vs-a8s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Nothing here is simulated. The 12 deals of AA against A8s 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 - [AA vs KTs: preflop equity](https://georgelipoker.com/equity/aa-vs-kts.md) - [AA vs KQo: preflop equity](https://georgelipoker.com/equity/aa-vs-kqo.md) - [KK vs A8s: preflop equity](https://georgelipoker.com/equity/kk-vs-a8s.md)