--- title: "AKo vs 55: preflop equity" url: "https://georgelipoker.com/equity/ako-vs-55.md" canonical_url: "https://georgelipoker.com/equity/ako-vs-55" last_updated: "2026-10-23" type: "reference" summary: "Who is ahead, AKo or 55? 55 leads 54.62% to 45.38% before the flop, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/ako-vs-qjs.md", "https://georgelipoker.com/equity/ako-vs-k9s.md", "https://georgelipoker.com/equity/ats-vs-55.md"] --- # AKo vs 55: preflop equity Who is ahead, AKo or 55? 55 leads 54.62% to 45.38% before the flop, counted exactly over every board, with the split by flop type and suit. The exact count puts 55 at 54.62% and AKo at 45.38% when the two hands see all five board cards. ## AKo against 55: the numbers **Exact preflop results for AKo against 55, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | AKo | 45.155 | 0.456 | 54.389 | 45.383 | | 55 | 54.389 | 0.456 | 45.155 | 54.617 | The first hand is an offsuit hand; the second is a pocket pair. This is a pair against two overcards, a matchup that stays close because the other hand only needs one of its ranks to appear. This is close to even money, with 55 a little ahead. Of every 100 boards, about 0.46 are split pots, and the equity figures already include them. The hand ranking puts AKo at 12 and 55 at 27 out of 169 starting hands. **Boards behind the percentages: 123,285,888 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | AKo | 55,670,000 | 562,000 | 67,054,000 | | 55 | 67,054,000 | 562,000 | 55,670,000 | Exact total: 72 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. **AKo against 55 read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | AKo | 0.831 | 2.215 | 1.839 | 1.203 | | 55 | 1.203 | 1.839 | 2.215 | 0.831 | 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 55 prefers low rainbow flops (nine high or lower), where it holds 81.06%, and likes rainbow flops topped by a ten or better least, where it holds 47.81%. Watch for rainbow flops topped by a ten or better: on those flops AKo holds the better equity. **AKo against 55 by flop texture, in percent** | Flop | Share of flops | AKo wins | Ties | 55 wins | AKo equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.717 | 52.091 | 0.208 | 47.701 | 52.195 | | Rainbow, nine or lower | 6.314 | 18.475 | 0.941 | 80.584 | 18.945 | | Two-tone | 46.485 | 45.613 | 0.343 | 54.044 | 45.785 | | Monotone | 5.151 | 47.616 | 1.858 | 50.526 | 48.545 | | Paired | 17.333 | 43.021 | 0.520 | 56.459 | 43.281 | A rainbow flop shows three suits, a two-tone flop repeats one suit, a monotone flop is a single suit, and a paired flop repeats a rank. ## Compared with a random hand A random hand would give AKo 65.32% and 55 60.33%. Against each other the change is -19.94 points for AKo and -5.71 for 55. **AKo and 55 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 | | --- | --- | --- | --- | --- | | AKo, all flops | 45.383 | 65.320 | -19.937 | 0.69478 | | AKo, rainbow, ten or higher | 52.195 | 65.320 | -13.125 | 0.79907 | | AKo, rainbow, nine or lower | 18.945 | 65.320 | -46.375 | 0.29003 | | AKo, two-tone | 45.785 | 65.320 | -19.535 | 0.70093 | | AKo, monotone | 48.545 | 65.320 | -16.775 | 0.74319 | | AKo, paired | 43.281 | 65.320 | -22.039 | 0.66260 | | 55, all flops | 54.617 | 60.325 | -5.708 | 0.90538 | | 55, rainbow, ten or higher | 47.805 | 60.325 | -12.520 | 0.79246 | | 55, rainbow, nine or lower | 81.055 | 60.325 | +20.730 | 1.34364 | | 55, two-tone | 54.215 | 60.325 | -6.110 | 0.89872 | | 55, monotone | 51.455 | 60.325 | -8.870 | 0.85296 | | 55, paired | 56.719 | 60.325 | -3.606 | 0.94022 | ## Does a shared suit matter? Looking only at deals where the hands share a suit, 55 has 54.54%; looking only at deals where they do not, 55.02%. 55 does better with no shared suit, by 0.48 points. **AKo against 55 by suit overlap, in percent** | Deals | Specific deals | Share of deals | AKo wins | Ties | 55 wins | AKo equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 60 | 83.33 | 45.227 | 0.471 | 54.302 | 45.462 | | No shared suit | 12 | 16.67 | 44.794 | 0.382 | 54.824 | 44.985 | ## How often this matchup comes up You will meet this exact matchup 0.0089% of the time in a random heads-up deal: 144 of 1,624,350, counting either seat order. ## A worked example A $100 all-in from each player makes a $200 pot, and the exact equity says 55 gets $109.24 of it on average and AKo gets $90.76. Scaled to 1,000 deals, that is roughly 544 wins for 55, 451 for AKo and 5 chopped pots. ## The same matchup from the other side The reversed view, 55 against AKo, shows 54.62% for 55 and 45.38% for AKo. It is the same count, so it redirects here. ## Keep exploring The calculator link fills in AsKh against 5d5c, a deal where the two hands share no suit. Change any card to test your own hand. The neighboring matchups below swap one of the two hands for one of similar strength. - [Open AsKh against 5d5c in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsKh&p2=5d5c) - [AKo combos](https://georgelipoker.com/combos/ako.md) - [55 combos](https://georgelipoker.com/combos/55.md) - [AKo vs QJs](https://georgelipoker.com/equity/ako-vs-qjs.md) - [AKo vs K9s](https://georgelipoker.com/equity/ako-vs-k9s.md) - [ATs vs 55](https://georgelipoker.com/equity/ats-vs-55.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed The page is built from a full enumeration: 1,712,304 boards, every suit pattern of the 72 specific deals, both seven-card hands evaluated. A tie is worth half a win to each hand, and a board is tallied under each of its ten possible flops for the texture rows. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [AKo vs QJs: preflop equity](https://georgelipoker.com/equity/ako-vs-qjs.md) - [AKo vs K9s: preflop equity](https://georgelipoker.com/equity/ako-vs-k9s.md) - [ATs vs 55: preflop equity](https://georgelipoker.com/equity/ats-vs-55.md)