--- title: "A5s vs A2s: preflop equity" url: "https://georgelipoker.com/equity/a5s-vs-a2s.md" canonical_url: "https://georgelipoker.com/equity/a5s-vs-a2s" last_updated: "2026-10-23" type: "reference" summary: "Who is ahead, A5s or A2s? A5s leads 55.43% to 44.57% before the flop, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/a5s-vs-qto.md", "https://georgelipoker.com/equity/a5s-vs-44.md", "https://georgelipoker.com/equity/a6s-vs-a2s.md"] --- # A5s vs A2s: preflop equity Who is ahead, A5s or A2s? A5s leads 55.43% to 44.57% before the flop, counted exactly over every board, with the split by flop type and suit. Averaged over every possible board, A5s is ahead of A2s by 10.86 points of equity, 55.43% to 44.57%. ## A5s against A2s: the numbers **Exact preflop results for A5s against A2s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | A5s | 35.994 | 38.875 | 25.131 | 55.431 | | A2s | 25.131 | 38.875 | 35.994 | 44.569 | Each side holds one of the suited hands: A5s and 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. A5s is ahead, but A2s is far from dead: it takes 251 of every 1,000 deals outright. The tie share is 38.88%: on those boards the pot is chopped and neither hand wins outright. A5s ranks number 30 of 169 starting hands, and A2s ranks number 46, by equity against a random hand. **Boards behind the percentages: 20,547,648 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | A5s | 7,396,000 | 7,988,000 | 5,164,000 | | A2s | 5,164,000 | 7,988,000 | 7,396,000 | 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. **A5s 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) | | --- | --- | --- | --- | --- | | A5s | 1.244 | 2.778 | 3.979 | 0.804 | | A2s | 0.804 | 3.979 | 2.778 | 1.244 | 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 Break the boards down by their first three cards and A5s is strongest on low rainbow flops (nine high or lower) (60.86%) and weakest on paired flops (52.72%). A5s stays ahead on all five textures. **A5s against A2s by flop texture, in percent** | Flop | Share of flops | A5s wins | Ties | A2s wins | A5s equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.526 | 33.439 | 44.068 | 22.493 | 55.473 | | Rainbow, nine or lower | 6.383 | 49.442 | 22.836 | 27.722 | 60.860 | | Two-tone | 46.543 | 38.469 | 34.649 | 26.882 | 55.794 | | Monotone | 5.215 | 40.754 | 27.226 | 32.020 | 54.367 | | Paired | 17.333 | 26.575 | 52.288 | 21.137 | 52.719 | 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 Relative to a random opponent, A5s changes by -4.49 points (baseline 59.92%) and A2s by -12.81 points (baseline 57.38%). **A5s 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 | | --- | --- | --- | --- | --- | | A5s, all flops | 55.431 | 59.923 | -4.492 | 0.92504 | | A5s, rainbow, ten or higher | 55.473 | 59.923 | -4.450 | 0.92574 | | A5s, rainbow, nine or lower | 60.860 | 59.923 | +0.937 | 1.01564 | | A5s, two-tone | 55.794 | 59.923 | -4.129 | 0.93109 | | A5s, monotone | 54.367 | 59.923 | -5.556 | 0.90728 | | A5s, paired | 52.719 | 59.923 | -7.204 | 0.87978 | | A2s, all flops | 44.569 | 57.379 | -12.810 | 0.77675 | | A2s, rainbow, ten or higher | 44.527 | 57.379 | -12.852 | 0.77602 | | A2s, rainbow, nine or lower | 39.140 | 57.379 | -18.239 | 0.68213 | | A2s, two-tone | 44.206 | 57.379 | -13.173 | 0.77042 | | A2s, monotone | 45.633 | 57.379 | -11.746 | 0.79529 | | A2s, paired | 47.281 | 57.379 | -10.098 | 0.82401 | ## Does a shared suit matter? Every legal deal of A5s against A2s leaves the hands with no suit in common, so the suit split does not apply here. **A5s against A2s by suit overlap, in percent** | Deals | Specific deals | Share of deals | A5s wins | Ties | A2s wins | A5s equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 0 | 0.00 | not possible | not possible | not possible | not possible | | No shared suit | 12 | 100.00 | 35.994 | 38.875 | 25.131 | 55.431 | ## How often this matchup comes up Exactly 12 specific deals fit this matchup in one seat order, which is 0.0007% of 1,624,350; both orders together give 24, or 0.0015%. ## A worked example Try it with money: two players each put in $100 and the whole board runs out every possible way. A5s averages $110.86 from the $200, up $10.86; A2s averages $89.14, down $10.86. In 1,000 deals of exactly this matchup, expect about 360 won outright by A5s, about 251 won outright by A2s and about 389 split. ## The same matchup from the other side If you came looking for A2s against A5s, the numbers are the same with the hands swapped: 44.57% and 55.43%. ## Keep exploring As5s against Ah2h is a ready-made deal for the calculator, with no suit in common between the hands. The neighboring matchups below replace one hand with another of similar strength. - [Open As5s against Ah2h in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=As5s&p2=Ah2h) - [A5s combos](https://georgelipoker.com/combos/a5s.md) - [A2s combos](https://georgelipoker.com/combos/a2s.md) - [A5s vs QTo](https://georgelipoker.com/equity/a5s-vs-qto.md) - [A5s vs 44](https://georgelipoker.com/equity/a5s-vs-44.md) - [A6s vs A2s](https://georgelipoker.com/equity/a6s-vs-a2s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Each figure is a complete count over boards. Take the 12 specific deals, group them by suit pattern, deal all 1,712,304 boards against each, and compare the two seven-card hands. Equity counts a tie as half a win; the flop rows use every one of a board's ten flops. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [A5s vs QTo: preflop equity](https://georgelipoker.com/equity/a5s-vs-qto.md) - [A5s vs 44: preflop equity](https://georgelipoker.com/equity/a5s-vs-44.md) - [A6s vs A2s: preflop equity](https://georgelipoker.com/equity/a6s-vs-a2s.md)