--- title: "AJo vs A5s: preflop equity" url: "https://georgelipoker.com/equity/ajo-vs-a5s.md" canonical_url: "https://georgelipoker.com/equity/ajo-vs-a5s" last_updated: "2026-10-23" type: "reference" summary: "AJo is a big favorite over A5s before the flop: 67.03% to 32.97% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/ajo-vs-a6s.md", "https://georgelipoker.com/equity/ajo-vs-kto.md", "https://georgelipoker.com/equity/kqs-vs-a5s.md"] --- # AJo vs A5s: preflop equity AJo is a big favorite over A5s before the flop: 67.03% to 32.97% equity, counted exactly over every board, with the split by flop type and suit. Before any board card is dealt, AJo holds 67.03% equity against A5s, which leaves A5s with 32.97%. ## AJo against A5s: the numbers **Exact preflop results for AJo against A5s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | AJo | 63.249 | 7.562 | 29.189 | 67.030 | | A5s | 29.189 | 7.562 | 63.249 | 32.970 | The first hand is an offsuit hand; the second is a suited hand. The two hands share a rank, and the one with the better other card dominates: it wins most kicker battles when that shared rank hits. That is a clear edge, 67.03% to 32.97%, but A5s still wins often enough that one hand proves nothing. Ties are part of the picture: 7.56% of boards end in a split pot, and each side counts that as half a win. Ranked by equity against a random hand, AJo is number 15 of the 169 starting hands and A5s is number 30. **Boards behind the percentages: 61,642,944 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | AJo | 38,989,000 | 4,661,000 | 17,993,000 | | A5s | 17,993,000 | 4,661,000 | 38,989,000 | Exact total: 36 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. **AJo 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) | | --- | --- | --- | --- | --- | | AJo | 2.033 | 1.581 | 3.426 | 0.492 | | A5s | 0.492 | 3.426 | 1.581 | 2.033 | In the last column, a pot-to-call ratio at or above the figure makes a call break even or better at this equity. ## Who is ahead on which flops Across the five flop textures AJo's equity moves by 22.03 points, from 52.63% on low rainbow flops (nine high or lower) to 74.66% on rainbow flops topped by a ten or better. AJo stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **AJo against A5s by flop texture, in percent** | Flop | Share of flops | AJo wins | Ties | A5s wins | AJo equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.905 | 71.844 | 5.625 | 22.531 | 74.656 | | Rainbow, nine or lower | 7.042 | 50.562 | 4.132 | 45.306 | 52.628 | | Two-tone | 46.527 | 63.555 | 5.018 | 31.427 | 66.064 | | Monotone | 5.192 | 59.625 | 5.952 | 34.423 | 62.601 | | Paired | 17.334 | 56.812 | 18.940 | 24.248 | 66.282 | 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 How much does the opponent matter? Compared with its random-hand 63.56%, AJo changes by +3.47 points, and A5s, from 59.92%, by -26.95. **AJo 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 | | --- | --- | --- | --- | --- | | AJo, all flops | 67.030 | 63.563 | +3.467 | 1.05454 | | AJo, rainbow, ten or higher | 74.656 | 63.563 | +11.093 | 1.17452 | | AJo, rainbow, nine or lower | 52.628 | 63.563 | -10.935 | 0.82797 | | AJo, two-tone | 66.064 | 63.563 | +2.501 | 1.03935 | | AJo, monotone | 62.601 | 63.563 | -0.962 | 0.98487 | | AJo, paired | 66.282 | 63.563 | +2.719 | 1.04278 | | A5s, all flops | 32.970 | 59.923 | -26.953 | 0.55021 | | A5s, rainbow, ten or higher | 25.344 | 59.923 | -34.579 | 0.42294 | | A5s, rainbow, nine or lower | 47.372 | 59.923 | -12.551 | 0.79055 | | A5s, two-tone | 33.936 | 59.923 | -25.987 | 0.56633 | | A5s, monotone | 37.399 | 59.923 | -22.524 | 0.62412 | | A5s, paired | 33.718 | 59.923 | -26.205 | 0.56269 | ## Does a shared suit matter? The suit split reads 67.83% for AJo with a shared suit and 66.63% without one. AJo does better with a shared suit, by 1.20 points. **AJo against A5s by suit overlap, in percent** | Deals | Specific deals | Share of deals | AJo wins | Ties | A5s wins | AJo equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 33.33 | 63.995 | 7.671 | 28.334 | 67.831 | | No shared suit | 24 | 66.67 | 62.875 | 7.508 | 29.617 | 66.629 | ## How often this matchup comes up Out of 1,624,350 ways to deal two seats two cards each, 36 are AJo in one seat and A5s in the other (0.0022%); with the seats swapped too, 72 (0.0044%). ## A worked example To see what the equity is worth, imagine $100 each in a $200 pot. AJo is worth $134.06 on average (+$34.06); A5s is worth $65.94 (-$34.06). A thousand deals look like this: AJo takes 632, A5s takes 292, 76 are ties. ## The same matchup from the other side Swap the hands and you get A5s with 32.97% against AJo with 67.03%. We keep one page per matchup, with the better-ranked hand first. ## Keep exploring Try AsJh against Ad5d 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 AsJh against Ad5d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsJh&p2=Ad5d) - [AJo combos](https://georgelipoker.com/combos/ajo.md) - [A5s combos](https://georgelipoker.com/combos/a5s.md) - [AJo vs A6s](https://georgelipoker.com/equity/ajo-vs-a6s.md) - [AJo vs KTo](https://georgelipoker.com/equity/ajo-vs-kto.md) - [KQs vs A5s](https://georgelipoker.com/equity/kqs-vs-a5s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Nothing here is simulated. The 36 deals of AJo against A5s 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 - [AJo vs A6s: preflop equity](https://georgelipoker.com/equity/ajo-vs-a6s.md) - [AJo vs KTo: preflop equity](https://georgelipoker.com/equity/ajo-vs-kto.md) - [KQs vs A5s: preflop equity](https://georgelipoker.com/equity/kqs-vs-a5s.md)