--- title: "A8s vs JTo: preflop equity" url: "https://georgelipoker.com/equity/a8s-vs-jto.md" canonical_url: "https://georgelipoker.com/equity/a8s-vs-jto" last_updated: "2026-10-23" type: "reference" summary: "Who is ahead, A8s or JTo? A8s leads 57.89% to 42.11% before the flop, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/a8s-vs-t9s.md", "https://georgelipoker.com/equity/a8s-vs-33.md", "https://georgelipoker.com/equity/kts-vs-jto.md"] --- # A8s vs JTo: preflop equity Who is ahead, A8s or JTo? A8s leads 57.89% to 42.11% before the flop, counted exactly over every board, with the split by flop type and suit. The exact count puts A8s at 57.89% and JTo at 42.11% when the two hands see all five board cards. ## A8s against JTo: the numbers **Exact preflop results for A8s against JTo, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | A8s | 57.673 | 0.426 | 41.901 | 57.886 | | JTo | 41.901 | 0.426 | 57.673 | 42.114 | The first hand is a suited hand; the second is an offsuit hand. The two hands share no rank, which makes this a pure matchup of card strength, straight chances and flush chances. That is a modest edge, the kind that shows up over many hands and is easy to miss in one. Of every 100 boards, about 0.43 are split pots, and the equity figures already include them. A8s ranks number 21 of 169 starting hands, and JTo ranks number 57, by equity against a random hand. **Boards behind the percentages: 82,190,592 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | A8s | 47,402,000 | 350,000 | 34,439,000 | | JTo | 34,439,000 | 350,000 | 47,402,000 | The total is exact: 48 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. **A8s 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) | | --- | --- | --- | --- | --- | | A8s | 1.375 | 1.734 | 2.387 | 0.728 | | JTo | 0.728 | 2.387 | 1.734 | 1.375 | 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 By flop texture, A8s' equity runs from 51.03% on rainbow flops topped by a ten or better up to 71.79% on low rainbow flops (nine high or lower). A8s stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **A8s against JTo by flop texture, in percent** | Flop | Share of flops | A8s wins | Ties | JTo wins | A8s equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.988 | 50.954 | 0.153 | 48.893 | 51.031 | | Rainbow, nine or lower | 7.042 | 71.468 | 0.645 | 27.887 | 71.790 | | Two-tone | 46.667 | 57.296 | 0.244 | 42.460 | 57.418 | | Monotone | 5.212 | 53.680 | 2.351 | 43.969 | 54.856 | | Paired | 17.091 | 63.670 | 0.629 | 35.701 | 63.984 | 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 Against one random hand instead, A8s holds 61.94% and JTo holds 55.25%. Facing each other changes that by -4.05 points for A8s and -13.14 points for JTo. **A8s 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 | | --- | --- | --- | --- | --- | | A8s, all flops | 57.886 | 61.944 | -4.058 | 0.93449 | | A8s, rainbow, ten or higher | 51.031 | 61.944 | -10.913 | 0.82382 | | A8s, rainbow, nine or lower | 71.790 | 61.944 | +9.846 | 1.15895 | | A8s, two-tone | 57.418 | 61.944 | -4.526 | 0.92693 | | A8s, monotone | 54.856 | 61.944 | -7.088 | 0.88557 | | A8s, paired | 63.984 | 61.944 | +2.040 | 1.03293 | | JTo, all flops | 42.114 | 55.248 | -13.134 | 0.76227 | | JTo, rainbow, ten or higher | 48.969 | 55.248 | -6.279 | 0.88635 | | JTo, rainbow, nine or lower | 28.210 | 55.248 | -27.038 | 0.51061 | | JTo, two-tone | 42.582 | 55.248 | -12.666 | 0.77074 | | JTo, monotone | 45.144 | 55.248 | -10.104 | 0.81712 | | JTo, paired | 36.016 | 55.248 | -19.232 | 0.65190 | ## Does a shared suit matter? The suit split reads 57.54% for A8s with a shared suit and 58.23% without one. A8s does better with no shared suit, by 0.69 points. **A8s against JTo by suit overlap, in percent** | Deals | Specific deals | Share of deals | A8s wins | Ties | JTo wins | A8s equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 24 | 50.00 | 57.309 | 0.467 | 42.224 | 57.543 | | No shared suit | 24 | 50.00 | 58.038 | 0.385 | 41.577 | 58.230 | ## How often this matchup comes up How often does it happen? 48 of the 1,624,350 ordered deals (0.0030%) are A8s 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, A8s' average share is $115.78 (a gain of $15.78) and JTo's is $84.22 (a loss of $15.78). Think in thousands: about 577 of 1,000 go to A8s, about 419 go to JTo, and about 4 are chopped. ## The same matchup from the other side Swap the hands and you get JTo with 42.11% against A8s with 57.89%. We keep one page per matchup, with the better-ranked hand first. ## Keep exploring Open the calculator with As8s against JhTd 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 As8s against JhTd in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=As8s&p2=JhTd) - [A8s combos](https://georgelipoker.com/combos/a8s.md) - [JTo combos](https://georgelipoker.com/combos/jto.md) - [A8s vs T9s](https://georgelipoker.com/equity/a8s-vs-t9s.md) - [A8s vs 33](https://georgelipoker.com/equity/a8s-vs-33.md) - [KTs vs JTo](https://georgelipoker.com/equity/kts-vs-jto.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Method: exact enumeration. The 48 specific deals are grouped by suit pattern, each is run against all 1,712,304 boards, and both seven-card hands are scored. Equity adds half of every tie, and flop textures are tallied over the ten flops inside each board. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [A8s vs T9s: preflop equity](https://georgelipoker.com/equity/a8s-vs-t9s.md) - [A8s vs 33: preflop equity](https://georgelipoker.com/equity/a8s-vs-33.md) - [KTs vs JTo: preflop equity](https://georgelipoker.com/equity/kts-vs-jto.md)