--- title: "AA vs A4s: preflop equity" url: "https://georgelipoker.com/equity/aa-vs-a4s.md" canonical_url: "https://georgelipoker.com/equity/aa-vs-a4s" last_updated: "2026-10-23" type: "reference" summary: "AA is a big favorite over A4s before the flop: 87.09% to 12.91% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/aa-vs-a3s.md", "https://georgelipoker.com/equity/aa-vs-qjo.md", "https://georgelipoker.com/equity/kk-vs-a4s.md"] --- # AA vs A4s: preflop equity AA is a big favorite over A4s before the flop: 87.09% to 12.91% equity, counted exactly over every board, with the split by flop type and suit. In equity, AA against A4s stands at 87.09% to 12.91%, a gap of 74.18 points. ## AA against A4s: the numbers **Exact preflop results for AA against A4s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | AA | 86.450 | 1.286 | 12.264 | 87.093 | | A4s | 12.264 | 1.286 | 86.450 | 12.907 | Here a pocket pair (AA) meets a suited hand (A4s). One hand holds a card of the same rank as the pair, which removes a card the pair needs and makes the pair a bigger favorite. This is one of the lopsided matchups: A4s wins only 12.26% of the boards outright. About 1.29% of boards chop the pot, which is why equity sits slightly above the win figure for both hands. Place 1 of 169 belongs to AA and place 35 belongs to A4s in the ranking against a random hand. **Boards behind the percentages: 20,547,648 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | AA | 17,763,000 | 264,000 | 2,520,000 | | A4s | 2,520,000 | 264,000 | 17,763,000 | 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. **AA against A4s 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 | 6.748 | 1.157 | 8.154 | 0.148 | | A4s | 0.148 | 8.154 | 1.157 | 6.748 | 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 Split by what the flop looks like, AA peaks at 92.38% on rainbow flops topped by a ten or better and bottoms out at 77.11% on monotone 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 A4s by flop texture, in percent** | Flop | Share of flops | AA wins | Ties | A4s wins | AA equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.740 | 91.774 | 1.220 | 7.006 | 92.384 | | Rainbow, nine or lower | 7.042 | 83.043 | 2.474 | 14.483 | 84.280 | | Two-tone | 46.236 | 84.908 | 1.362 | 13.730 | 85.589 | | Monotone | 5.151 | 75.929 | 2.365 | 21.706 | 77.112 | | Paired | 17.831 | 87.748 | 0.393 | 11.859 | 87.944 | 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 AA 85.20% and A4s 59.03%. Against each other the change is +1.89 points for AA and -46.12 for A4s. **AA and A4s 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 | 87.093 | 85.204 | +1.889 | 1.02217 | | AA, rainbow, ten or higher | 92.384 | 85.204 | +7.180 | 1.08427 | | AA, rainbow, nine or lower | 84.280 | 85.204 | -0.924 | 0.98916 | | AA, two-tone | 85.589 | 85.204 | +0.385 | 1.00452 | | AA, monotone | 77.112 | 85.204 | -8.092 | 0.90503 | | AA, paired | 87.944 | 85.204 | +2.740 | 1.03216 | | A4s, all flops | 12.907 | 59.034 | -46.127 | 0.21864 | | A4s, rainbow, ten or higher | 7.616 | 59.034 | -51.418 | 0.12901 | | A4s, rainbow, nine or lower | 15.720 | 59.034 | -43.314 | 0.26629 | | A4s, two-tone | 14.411 | 59.034 | -44.623 | 0.24411 | | A4s, monotone | 22.888 | 59.034 | -36.146 | 0.38771 | | A4s, paired | 12.056 | 59.034 | -46.978 | 0.20422 | ## Does a shared suit matter? For this pair the shared-suit row is empty: the two hands cannot both own a card of one suit without reusing a card. **AA against A4s by suit overlap, in percent** | Deals | Specific deals | Share of deals | AA wins | Ties | A4s wins | AA equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 0 | 0.00 | not possible | not possible | not possible | not possible | | No shared suit | 12 | 100.00 | 86.450 | 1.286 | 12.264 | 87.093 | ## How often this matchup comes up AA against A4s 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 Try it with money: two players each put in $100 and the whole board runs out every possible way. AA averages $174.18 from the $200, up $74.18; A4s averages $25.82, down $74.18. A thousand deals look like this: AA takes 864, A4s takes 123, 13 are ties. ## The same matchup from the other side One page covers both views. From A4s' side the equity is 12.91%, and from AA's side it is 87.09%. ## Keep exploring Try AsAh against Ad4d 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 AsAh against Ad4d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsAh&p2=Ad4d) - [AA combos](https://georgelipoker.com/combos/aa.md) - [A4s combos](https://georgelipoker.com/combos/a4s.md) - [AA vs A3s](https://georgelipoker.com/equity/aa-vs-a3s.md) - [AA vs QJo](https://georgelipoker.com/equity/aa-vs-qjo.md) - [KK vs A4s](https://georgelipoker.com/equity/kk-vs-a4s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Nothing here is simulated. The 12 deals of AA against A4s fall into a few suit patterns, each dealt against all 1,712,304 boards, with both best five-card hands compared on every board. Ties give each hand half a win, and the flop rows count a board under each of its ten flops. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [AA vs A3s: preflop equity](https://georgelipoker.com/equity/aa-vs-a3s.md) - [AA vs QJo: preflop equity](https://georgelipoker.com/equity/aa-vs-qjo.md) - [KK vs A4s: preflop equity](https://georgelipoker.com/equity/kk-vs-a4s.md)