--- title: "A8s vs A2s: preflop equity" url: "https://georgelipoker.com/equity/a8s-vs-a2s.md" canonical_url: "https://georgelipoker.com/equity/a8s-vs-a2s" last_updated: "2026-10-23" type: "reference" summary: "A8s is a big favorite over A2s before the flop: 63.68% to 36.32% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/a8s-vs-qto.md", "https://georgelipoker.com/equity/a8s-vs-44.md", "https://georgelipoker.com/equity/kts-vs-a2s.md"] --- # A8s vs A2s: preflop equity A8s is a big favorite over A2s before the flop: 63.68% to 36.32% equity, counted exactly over every board, with the split by flop type and suit. Counting every board, the equity split is 63.68% for A8s and 36.32% for A2s, so A8s leads by 27.36 points. ## A8s against A2s: the numbers **Exact preflop results for A8s against A2s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | A8s | 54.115 | 19.121 | 26.764 | 63.676 | | A2s | 26.764 | 19.121 | 54.115 | 36.324 | Two suited hands meet here: A8s against A2s. Sharing a rank is the signature of a dominated hand, since the weaker hand is usually out-kicked when the shared rank shows up. That is a modest edge, the kind that shows up over many hands and is easy to miss in one. About 19.12% of boards chop the pot, which is why equity sits slightly above the win figure for both hands. Among the 169 starting hands, A8s is number 21 and A2s is number 46 by strength against a random hand. **Boards behind the percentages: 20,547,648 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | A8s | 11,119,000 | 3,929,000 | 5,499,000 | | A2s | 5,499,000 | 3,929,000 | 11,119,000 | 12 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. **A8s 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) | | --- | --- | --- | --- | --- | | A8s | 1.753 | 1.848 | 3.736 | 0.570 | | A2s | 0.570 | 3.736 | 1.848 | 1.753 | 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 A8s prefers rainbow flops topped by a ten or better, where it holds 66.35%, and likes paired flops least, where it holds 59.57%. A8s stays ahead on all five textures. **A8s against A2s by flop texture, in percent** | Flop | Share of flops | A8s wins | Ties | A2s wins | A8s equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.526 | 56.602 | 19.504 | 23.894 | 66.354 | | Rainbow, nine or lower | 6.383 | 62.166 | 5.864 | 31.970 | 65.098 | | Two-tone | 46.543 | 56.565 | 14.876 | 28.559 | 64.003 | | Monotone | 5.215 | 53.250 | 13.646 | 33.104 | 60.073 | | Paired | 17.333 | 41.314 | 36.505 | 22.181 | 59.567 | Rainbow flops have three suits, two-tone flops repeat one suit, monotone flops are all one suit, and paired flops repeat a rank. ## Compared with a random hand The table below sets each hand against its own random-hand baseline: a change of +1.74 points for A8s, from 61.94%, and -21.06 for A2s, from 57.38%. **A8s 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 | | --- | --- | --- | --- | --- | | A8s, all flops | 63.676 | 61.944 | +1.732 | 1.02796 | | A8s, rainbow, ten or higher | 66.354 | 61.944 | +4.410 | 1.07119 | | A8s, rainbow, nine or lower | 65.098 | 61.944 | +3.154 | 1.05092 | | A8s, two-tone | 64.003 | 61.944 | +2.059 | 1.03324 | | A8s, monotone | 60.073 | 61.944 | -1.871 | 0.96980 | | A8s, paired | 59.567 | 61.944 | -2.377 | 0.96163 | | A2s, all flops | 36.324 | 57.379 | -21.055 | 0.63305 | | A2s, rainbow, ten or higher | 33.646 | 57.379 | -23.733 | 0.58638 | | A2s, rainbow, nine or lower | 34.902 | 57.379 | -22.477 | 0.60827 | | A2s, two-tone | 35.997 | 57.379 | -21.382 | 0.62735 | | A2s, monotone | 39.927 | 57.379 | -17.452 | 0.69585 | | A2s, paired | 40.433 | 57.379 | -16.946 | 0.70467 | ## 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. **A8s against A2s by suit overlap, in percent** | Deals | Specific deals | Share of deals | A8s wins | Ties | A2s wins | A8s equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 0 | 0.00 | not possible | not possible | not possible | not possible | | No shared suit | 12 | 100.00 | 54.115 | 19.121 | 26.764 | 63.676 | ## How often this matchup comes up A8s against A2s is made up of 12 specific-card matchups in one seat order, 0.0007% of the 1,624,350 ordered deals, and 24 counting both seat orders, 0.0015%. ## A worked example Worked example: both players commit $100, so $200 sits in the middle. Over every board, A8s' average share is $127.36 (a gain of $27.36) and A2s' is $72.64 (a loss of $27.36). Scaled to 1,000 deals, that is roughly 541 wins for A8s, 268 for A2s and 191 chopped pots. ## The same matchup from the other side If you came looking for A2s against A8s, the numbers are the same with the hands swapped: 36.32% and 63.68%. ## Keep exploring Try As8s against Ah2h 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 As8s against Ah2h in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=As8s&p2=Ah2h) - [A8s combos](https://georgelipoker.com/combos/a8s.md) - [A2s combos](https://georgelipoker.com/combos/a2s.md) - [A8s vs QTo](https://georgelipoker.com/equity/a8s-vs-qto.md) - [A8s vs 44](https://georgelipoker.com/equity/a8s-vs-44.md) - [KTs vs A2s](https://georgelipoker.com/equity/kts-vs-a2s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed This is an exact count with no sampling. For the 12 ways to deal one A8s and one A2s without reusing a card, grouped by suit pattern, every one of the 1,712,304 possible boards is dealt and both seven-card hands are compared. A tie counts as half a win in the equity column, and each board is counted once under each of its ten three-card flops. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [A8s vs QTo: preflop equity](https://georgelipoker.com/equity/a8s-vs-qto.md) - [A8s vs 44: preflop equity](https://georgelipoker.com/equity/a8s-vs-44.md) - [KTs vs A2s: preflop equity](https://georgelipoker.com/equity/kts-vs-a2s.md)