--- title: "55 vs A5s: preflop equity" url: "https://georgelipoker.com/equity/55-vs-a5s.md" canonical_url: "https://georgelipoker.com/equity/55-vs-a5s" last_updated: "2026-10-23" type: "reference" summary: "55 is a big favorite over A5s before the flop: 63.54% to 36.47% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/55-vs-a6s.md", "https://georgelipoker.com/equity/55-vs-kto.md", "https://georgelipoker.com/equity/qjs-vs-a5s.md"] --- # 55 vs A5s: preflop equity 55 is a big favorite over A5s before the flop: 63.54% to 36.47% equity, counted exactly over every board, with the split by flop type and suit. The exact count puts 55 at 63.54% and A5s at 36.46% when the two hands see all five board cards. ## 55 against A5s: the numbers **Exact preflop results for 55 against A5s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | 55 | 62.229 | 2.611 | 35.160 | 63.535 | | A5s | 35.160 | 2.611 | 62.229 | 36.465 | 55 is a pocket pair and A5s is a suited hand. The pair already holds one of the other hand's ranks, and that overlap cuts down the cards the other hand can pair with. The lead is steady rather than large, and the flop still has plenty of say in who wins. Of every 100 boards, about 2.61 are split pots, and the equity figures already include them. The hand ranking puts 55 at 27 and A5s at 30 out of 169 starting hands. **Boards behind the percentages: 20,547,648 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | 55 | 12,787,000 | 536,000 | 7,225,000 | | A5s | 7,225,000 | 536,000 | 12,787,000 | The board total is exact, 12 deals at 1,712,304 boards each. Won, tied and lost counts are rounded to the nearest thousand from the five-decimal percentages. **55 against A5s read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | 55 | 1.742 | 1.607 | 2.844 | 0.574 | | A5s | 0.574 | 2.844 | 1.607 | 1.742 | The final column gives the least the pot must offer for each unit called for a call to break even at this equity. ## Who is ahead on which flops If you know the kind of flop that came, the numbers shift: 55 holds 76.10% on low rainbow flops (nine high or lower) and 60.23% on monotone flops. 55 stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **55 against A5s by flop texture, in percent** | Flop | Share of flops | 55 wins | Ties | A5s wins | 55 equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 25.197 | 62.267 | 1.622 | 36.111 | 63.078 | | Rainbow, nine or lower | 5.585 | 71.572 | 9.064 | 19.364 | 76.104 | | Two-tone | 46.236 | 60.785 | 2.675 | 36.540 | 62.122 | | Monotone | 5.151 | 58.501 | 3.465 | 38.034 | 60.233 | | Paired | 17.831 | 64.073 | 1.574 | 34.353 | 64.860 | 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 Start from the random-hand figures, 60.33% for 55 and 59.92% for A5s. This opponent changes them by +3.21 and -23.46 points. **55 and A5s 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 | | --- | --- | --- | --- | --- | | 55, all flops | 63.535 | 60.325 | +3.210 | 1.05321 | | 55, rainbow, ten or higher | 63.078 | 60.325 | +2.753 | 1.04564 | | 55, rainbow, nine or lower | 76.104 | 60.325 | +15.779 | 1.26157 | | 55, two-tone | 62.122 | 60.325 | +1.797 | 1.02979 | | 55, monotone | 60.233 | 60.325 | -0.092 | 0.99847 | | 55, paired | 64.860 | 60.325 | +4.535 | 1.07518 | | A5s, all flops | 36.465 | 59.923 | -23.458 | 0.60853 | | A5s, rainbow, ten or higher | 36.922 | 59.923 | -23.001 | 0.61616 | | A5s, rainbow, nine or lower | 23.896 | 59.923 | -36.027 | 0.39878 | | A5s, two-tone | 37.878 | 59.923 | -22.045 | 0.63211 | | A5s, monotone | 39.767 | 59.923 | -20.156 | 0.66363 | | A5s, paired | 35.140 | 59.923 | -24.783 | 0.58642 | ## Does a shared suit matter? A shared suit is impossible for this matchup, so 55's 63.54% is the answer for every suit pattern. **55 against A5s by suit overlap, in percent** | Deals | Specific deals | Share of deals | 55 wins | Ties | A5s wins | 55 equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 0 | 0.00 | not possible | not possible | not possible | not possible | | No shared suit | 12 | 100.00 | 62.229 | 2.611 | 35.160 | 63.535 | ## 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 A $100 all-in from each player makes a $200 pot, and the exact equity says 55 gets $127.08 of it on average and A5s gets $72.92. Run 1,000 deals and the tally comes out near 622 for 55, 352 for A5s and 26 ties. ## The same matchup from the other side Swap the hands and you get A5s with 36.46% against 55 with 63.54%. We keep one page per matchup, with the better-ranked hand first. ## Keep exploring 5s5h against Ad5d 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 5s5h against Ad5d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=5s5h&p2=Ad5d) - [55 combos](https://georgelipoker.com/combos/55.md) - [A5s combos](https://georgelipoker.com/combos/a5s.md) - [55 vs A6s](https://georgelipoker.com/equity/55-vs-a6s.md) - [55 vs KTo](https://georgelipoker.com/equity/55-vs-kto.md) - [QJs vs A5s](https://georgelipoker.com/equity/qjs-vs-a5s.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 55 and one A5s 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 - [55 vs A6s: preflop equity](https://georgelipoker.com/equity/55-vs-a6s.md) - [55 vs KTo: preflop equity](https://georgelipoker.com/equity/55-vs-kto.md) - [QJs vs A5s: preflop equity](https://georgelipoker.com/equity/qjs-vs-a5s.md)