--- title: "AJo vs A2s: preflop equity" url: "https://georgelipoker.com/equity/ajo-vs-a2s.md" canonical_url: "https://georgelipoker.com/equity/ajo-vs-a2s" last_updated: "2026-10-23" type: "reference" summary: "AJo is a big favorite over A2s before the flop: 68.39% to 31.61% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/ajo-vs-qto.md", "https://georgelipoker.com/equity/ajo-vs-44.md", "https://georgelipoker.com/equity/kqs-vs-a2s.md"] --- # AJo vs A2s: preflop equity AJo is a big favorite over A2s before the flop: 68.39% to 31.61% equity, counted exactly over every board, with the split by flop type and suit. Before any board card is dealt, AJo holds 68.39% equity against A2s, which leaves A2s with 31.61%. ## AJo against A2s: the numbers **Exact preflop results for AJo against A2s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | AJo | 64.490 | 7.802 | 27.708 | 68.391 | | A2s | 27.708 | 7.802 | 64.490 | 31.609 | AJo is an offsuit hand and A2s is a suited hand. Sharing a rank is the signature of a dominated hand, since the weaker hand is usually out-kicked when the shared rank shows up. A lead of 36.78 points is large but not decisive: A2s still takes about 277 of every 1,000 deals. Ties are 7.80% of the outcomes here; each tied board gives both hands half the pot. In the ranking of all 169 starting hands, AJo is number 15 and A2s is number 46. **Boards behind the percentages: 61,642,944 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | AJo | 39,754,000 | 4,809,000 | 17,080,000 | | A2s | 17,080,000 | 4,809,000 | 39,754,000 | 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 A2s 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 | 2.164 | 1.551 | 3.609 | 0.462 | | A2s | 0.462 | 3.609 | 1.551 | 2.164 | 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 18.85 points, from 56.62% on low rainbow flops (nine high or lower) to 75.47% 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 A2s by flop texture, in percent** | Flop | Share of flops | AJo wins | Ties | A2s wins | AJo equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.905 | 72.612 | 5.715 | 21.673 | 75.469 | | Rainbow, nine or lower | 7.042 | 54.342 | 4.545 | 41.113 | 56.615 | | Two-tone | 46.527 | 64.883 | 5.172 | 29.945 | 67.469 | | Monotone | 5.192 | 60.563 | 6.087 | 33.350 | 63.606 | | Paired | 17.334 | 57.533 | 19.573 | 22.894 | 67.319 | Read the flop types this way: rainbow has three suits, two-tone has two cards of one suit, monotone has three, and paired repeats a rank. ## Compared with a random hand Start from the random-hand figures, 63.56% for AJo and 57.38% for A2s. This opponent changes them by +4.83 and -25.77 points. **AJo and A2s 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 | 68.391 | 63.563 | +4.828 | 1.07596 | | AJo, rainbow, ten or higher | 75.469 | 63.563 | +11.906 | 1.18731 | | AJo, rainbow, nine or lower | 56.615 | 63.563 | -6.948 | 0.89069 | | AJo, two-tone | 67.469 | 63.563 | +3.906 | 1.06145 | | AJo, monotone | 63.606 | 63.563 | +0.043 | 1.00068 | | AJo, paired | 67.319 | 63.563 | +3.756 | 1.05909 | | A2s, all flops | 31.609 | 57.379 | -25.770 | 0.55088 | | A2s, rainbow, ten or higher | 24.531 | 57.379 | -32.848 | 0.42753 | | A2s, rainbow, nine or lower | 43.385 | 57.379 | -13.994 | 0.75611 | | A2s, two-tone | 32.531 | 57.379 | -24.848 | 0.56695 | | A2s, monotone | 36.394 | 57.379 | -20.985 | 0.63427 | | A2s, paired | 32.681 | 57.379 | -24.698 | 0.56956 | ## Does a shared suit matter? Split by suits, the deals give AJo 69.21% when the hands overlap in a suit and 67.98% when they do not. AJo does better with a shared suit, by 1.23 points. **AJo against A2s by suit overlap, in percent** | Deals | Specific deals | Share of deals | AJo wins | Ties | A2s wins | AJo equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 33.33 | 65.256 | 7.911 | 26.833 | 69.211 | | No shared suit | 24 | 66.67 | 64.107 | 7.747 | 28.146 | 67.981 | ## How often this matchup comes up AJo against A2s is made up of 36 specific-card matchups in one seat order, 0.0022% of the 1,624,350 ordered deals, and 72 counting both seat orders, 0.0044%. ## A worked example Worked example: both players commit $100, so $200 sits in the middle. Over every board, AJo's average share is $136.78 (a gain of $36.78) and A2s' is $63.22 (a loss of $36.78). Scaled to 1,000 deals, that is roughly 645 wins for AJo, 277 for A2s and 78 chopped pots. ## The same matchup from the other side The reversed view, A2s against AJo, shows 31.61% for A2s and 68.39% for AJo. It is the same count, so it redirects here. ## Keep exploring The calculator link fills in AsJh against Ad2d, 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 AsJh against Ad2d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsJh&p2=Ad2d) - [AJo combos](https://georgelipoker.com/combos/ajo.md) - [A2s combos](https://georgelipoker.com/combos/a2s.md) - [AJo vs QTo](https://georgelipoker.com/equity/ajo-vs-qto.md) - [AJo vs 44](https://georgelipoker.com/equity/ajo-vs-44.md) - [KQs vs A2s](https://georgelipoker.com/equity/kqs-vs-a2s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Nothing here is simulated. The 36 deals of AJo against A2s 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 QTo: preflop equity](https://georgelipoker.com/equity/ajo-vs-qto.md) - [AJo vs 44: preflop equity](https://georgelipoker.com/equity/ajo-vs-44.md) - [KQs vs A2s: preflop equity](https://georgelipoker.com/equity/kqs-vs-a2s.md)