--- title: "AA vs 55: preflop equity" url: "https://georgelipoker.com/equity/aa-vs-55.md" canonical_url: "https://georgelipoker.com/equity/aa-vs-55" last_updated: "2026-10-23" type: "reference" summary: "AA is a big favorite over 55 before the flop: 80.89% to 19.11% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/aa-vs-qjs.md", "https://georgelipoker.com/equity/aa-vs-k9s.md", "https://georgelipoker.com/equity/kk-vs-55.md"] --- # AA vs 55: preflop equity AA is a big favorite over 55 before the flop: 80.89% to 19.11% equity, counted exactly over every board, with the split by flop type and suit. If AA and 55 get all the chips in before the flop, AA owns 80.89% of the pot in the long run and 55 owns 19.11%. ## AA against 55: the numbers **Exact preflop results for AA against 55, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | AA | 80.682 | 0.413 | 18.905 | 80.889 | | 55 | 18.905 | 0.413 | 80.682 | 19.111 | The matchup is pocket pairs on both sides, AA against 55. Two pairs against each other is a one-way street: the lower pair needs one of its two remaining cards. AA is a big favorite here before anyone sees a flop. About 0.41% of boards chop the pot, which is why equity sits slightly above the win figure for both hands. For context, AA sits at number 1 of 169 starting hands and 55 at number 27 when each is run against a random hand. **Boards behind the percentages: 61,642,944 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | AA | 49,735,000 | 255,000 | 11,654,000 | | 55 | 11,654,000 | 255,000 | 49,735,000 | The total is exact: 36 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. **AA 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) | | --- | --- | --- | --- | --- | | AA | 4.233 | 1.239 | 5.290 | 0.236 | | 55 | 0.236 | 5.290 | 1.239 | 4.233 | 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 By flop texture, AA's equity runs from 66.21% on low rainbow flops (nine high or lower) up to 86.72% on paired flops. AA stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **AA against 55 by flop texture, in percent** | Flop | Share of flops | AA wins | Ties | 55 wins | AA equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.595 | 83.740 | 0.287 | 15.973 | 83.884 | | Rainbow, nine or lower | 6.314 | 65.751 | 0.923 | 33.326 | 66.213 | | Two-tone | 46.363 | 79.510 | 0.400 | 20.090 | 79.710 | | Monotone | 5.152 | 74.344 | 1.898 | 23.758 | 75.293 | | Paired | 17.576 | 86.713 | 0.007 | 13.280 | 86.717 | 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 Each hand has a baseline against a random hand: 85.20% for AA, 60.33% for 55. Here the change is -4.31 and -41.22 points. **AA 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 | | --- | --- | --- | --- | --- | | AA, all flops | 80.889 | 85.204 | -4.315 | 0.94936 | | AA, rainbow, ten or higher | 83.884 | 85.204 | -1.320 | 0.98451 | | AA, rainbow, nine or lower | 66.213 | 85.204 | -18.991 | 0.77711 | | AA, two-tone | 79.710 | 85.204 | -5.494 | 0.93552 | | AA, monotone | 75.293 | 85.204 | -9.911 | 0.88368 | | AA, paired | 86.717 | 85.204 | +1.513 | 1.01776 | | 55, all flops | 19.111 | 60.325 | -41.214 | 0.31680 | | 55, rainbow, ten or higher | 16.116 | 60.325 | -44.209 | 0.26715 | | 55, rainbow, nine or lower | 33.787 | 60.325 | -26.538 | 0.56008 | | 55, two-tone | 20.290 | 60.325 | -40.035 | 0.33634 | | 55, monotone | 24.707 | 60.325 | -35.618 | 0.40956 | | 55, paired | 13.283 | 60.325 | -47.042 | 0.22019 | ## Does a shared suit matter? Suit overlap shows up in the numbers. With a suit in common AA has 81.02% equity, and with none in common it has 80.23%. AA does better with a shared suit, by 0.79 points. **AA against 55 by suit overlap, in percent** | Deals | Specific deals | Share of deals | AA wins | Ties | 55 wins | AA equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 30 | 83.33 | 80.807 | 0.428 | 18.765 | 81.021 | | No shared suit | 6 | 16.67 | 80.056 | 0.339 | 19.605 | 80.226 | ## How often this matchup comes up Exactly 36 specific deals fit this matchup in one seat order, which is 0.0022% of 1,624,350; both orders together give 72, or 0.0044%. ## A worked example Take a $200 pot built from $100 each. AA's equity of 80.89% is worth $161.78, a $61.78 edge, and 55's 19.11% is worth $38.22, which is $61.78 under its stake. Run 1,000 deals and the tally comes out near 807 for AA, 189 for 55 and 4 ties. ## The same matchup from the other side The mirror image, 55 against AA, is 19.11% to 80.89%, and its address redirects to this page. ## Keep exploring Open the calculator with AsAh against 5d5c 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 5d5c in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsAh&p2=5d5c) - [AA combos](https://georgelipoker.com/combos/aa.md) - [55 combos](https://georgelipoker.com/combos/55.md) - [AA vs QJs](https://georgelipoker.com/equity/aa-vs-qjs.md) - [AA vs K9s](https://georgelipoker.com/equity/aa-vs-k9s.md) - [KK vs 55](https://georgelipoker.com/equity/kk-vs-55.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed All 1,712,304 five-card boards are dealt for every suit pattern among the 36 specific deals of AA against 55, and both hands are scored on each. That is a full count, so the percentages are exact. Ties are half a win each, and each board appears once per flop it contains. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [AA vs QJs: preflop equity](https://georgelipoker.com/equity/aa-vs-qjs.md) - [AA vs K9s: preflop equity](https://georgelipoker.com/equity/aa-vs-k9s.md) - [KK vs 55: preflop equity](https://georgelipoker.com/equity/kk-vs-55.md)