--- title: "A2s vs JTo: preflop equity" url: "https://georgelipoker.com/equity/a2s-vs-jto.md" canonical_url: "https://georgelipoker.com/equity/a2s-vs-jto" last_updated: "2026-10-23" type: "reference" summary: "Who is ahead, A2s or JTo? A2s leads 56.95% to 43.05% before the flop, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/a2s-vs-t9s.md", "https://georgelipoker.com/equity/a2s-vs-33.md", "https://georgelipoker.com/equity/qto-vs-jto.md"] --- # A2s vs JTo: preflop equity Who is ahead, A2s or JTo? A2s leads 56.95% to 43.05% before the flop, counted exactly over every board, with the split by flop type and suit. Counting every board, the equity split is 56.95% for A2s and 43.05% for JTo, so A2s leads by 13.90 points. ## A2s against JTo: the numbers **Exact preflop results for A2s against JTo, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | A2s | 56.705 | 0.486 | 42.809 | 56.948 | | JTo | 42.809 | 0.486 | 56.705 | 43.052 | The first hand is a suited hand; the second is an offsuit hand. With no overlap in ranks, every card that pairs one hand is a card that does not pair the other. The lead is steady rather than large, and the flop still has plenty of say in who wins. A split pot comes up on 0.49% of boards, so the wins and the equity differ by half of that. In the ranking of all 169 starting hands, A2s is number 46 and JTo is number 57. **Boards behind the percentages: 82,190,592 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | A2s | 46,606,000 | 399,000 | 35,185,000 | | JTo | 35,185,000 | 399,000 | 46,606,000 | The board total is exact, 48 deals at 1,712,304 boards each. Won, tied and lost counts are rounded to the nearest thousand from the five-decimal percentages. **A2s against JTo read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | A2s | 1.323 | 1.764 | 2.336 | 0.756 | | JTo | 0.756 | 2.336 | 1.764 | 1.323 | 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 Split by what the flop looks like, A2s peaks at 70.16% on low rainbow flops (nine high or lower) and bottoms out at 50.02% on rainbow flops topped by a ten or better. A2s stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **A2s against JTo by flop texture, in percent** | Flop | Share of flops | A2s wins | Ties | JTo wins | A2s equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.988 | 49.940 | 0.165 | 49.895 | 50.023 | | Rainbow, nine or lower | 7.042 | 69.699 | 0.929 | 29.372 | 70.163 | | Two-tone | 46.667 | 56.317 | 0.309 | 43.374 | 56.471 | | Monotone | 5.212 | 53.117 | 2.397 | 44.486 | 54.315 | | Paired | 17.091 | 63.003 | 0.653 | 36.344 | 63.329 | 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 Relative to a random opponent, A2s changes by -0.43 points (baseline 57.38%) and JTo by -12.20 points (baseline 55.25%). **A2s and JTo 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 | | --- | --- | --- | --- | --- | | A2s, all flops | 56.948 | 57.379 | -0.431 | 0.99249 | | A2s, rainbow, ten or higher | 50.023 | 57.379 | -7.356 | 0.87180 | | A2s, rainbow, nine or lower | 70.163 | 57.379 | +12.784 | 1.22280 | | A2s, two-tone | 56.471 | 57.379 | -0.908 | 0.98418 | | A2s, monotone | 54.315 | 57.379 | -3.064 | 0.94660 | | A2s, paired | 63.329 | 57.379 | +5.950 | 1.10370 | | JTo, all flops | 43.052 | 55.248 | -12.196 | 0.77925 | | JTo, rainbow, ten or higher | 49.977 | 55.248 | -5.271 | 0.90459 | | JTo, rainbow, nine or lower | 29.837 | 55.248 | -25.411 | 0.54006 | | JTo, two-tone | 43.529 | 55.248 | -11.719 | 0.78788 | | JTo, monotone | 45.685 | 55.248 | -9.563 | 0.82691 | | JTo, paired | 36.671 | 55.248 | -18.577 | 0.66375 | ## Does a shared suit matter? Of the deals of this matchup, 24 share a suit (A2s at 56.59%) and 24 do not (57.31%). A2s does better with no shared suit, by 0.72 points. **A2s against JTo by suit overlap, in percent** | Deals | Specific deals | Share of deals | A2s wins | Ties | JTo wins | A2s equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 24 | 50.00 | 56.321 | 0.528 | 43.151 | 56.585 | | No shared suit | 24 | 50.00 | 57.090 | 0.443 | 42.467 | 57.312 | ## How often this matchup comes up How often does it happen? 48 of the 1,624,350 ordered deals (0.0030%) are A2s against JTo, and 96 (0.0059%) if either hand may sit in either seat. ## A worked example Worked example: both players commit $100, so $200 sits in the middle. Over every board, A2s' average share is $113.90 (a gain of $13.90) and JTo's is $86.10 (a loss of $13.90). Over a long run, 1,000 deals split into about 567 for A2s, 428 for JTo and 5 tied. ## The same matchup from the other side If you came looking for JTo against A2s, the numbers are the same with the hands swapped: 43.05% and 56.95%. ## Keep exploring Try As2s against JhTd 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 As2s against JhTd in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=As2s&p2=JhTd) - [A2s combos](https://georgelipoker.com/combos/a2s.md) - [JTo combos](https://georgelipoker.com/combos/jto.md) - [A2s vs T9s](https://georgelipoker.com/equity/a2s-vs-t9s.md) - [A2s vs 33](https://georgelipoker.com/equity/a2s-vs-33.md) - [QTo vs JTo](https://georgelipoker.com/equity/qto-vs-jto.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed The figures are counted, not estimated: 1,712,304 boards for every suit pattern of the 48 specific deals, with both seven-card hands compared each time. Equity gives half a win for a tie. For the flop rows, a board is counted once under each of the ten flops inside it. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [A2s vs T9s: preflop equity](https://georgelipoker.com/equity/a2s-vs-t9s.md) - [A2s vs 33: preflop equity](https://georgelipoker.com/equity/a2s-vs-33.md) - [QTo vs JTo: preflop equity](https://georgelipoker.com/equity/qto-vs-jto.md)