--- title: "KK vs A8s: preflop equity" url: "https://georgelipoker.com/equity/kk-vs-a8s.md" canonical_url: "https://georgelipoker.com/equity/kk-vs-a8s" last_updated: "2026-10-23" type: "reference" summary: "KK is a big favorite over A8s before the flop: 68.07% to 31.93% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/kk-vs-kts.md", "https://georgelipoker.com/equity/kk-vs-kqo.md", "https://georgelipoker.com/equity/qq-vs-a8s.md"] --- # KK vs A8s: preflop equity KK is a big favorite over A8s before the flop: 68.07% to 31.93% equity, counted exactly over every board, with the split by flop type and suit. Dealt all in against each other, KK takes 68.07% of the pot on average and A8s takes the other 31.93%. ## KK against A8s: the numbers **Exact preflop results for KK against A8s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | KK | 67.873 | 0.394 | 31.733 | 68.070 | | A8s | 31.733 | 0.394 | 67.873 | 31.930 | KK and A8s are a pocket pair and a suited hand, in that order. The pair sits between the other hand's two cards: one is higher and one is lower, so the pair is exposed to the higher card. KK is well ahead, and A8s needs a specific kind of board to catch up. Of every 100 boards, about 0.39 are split pots, and the equity figures already include them. For context, KK sits at number 2 of 169 starting hands and A8s at number 21 when each is run against a random hand. **Boards behind the percentages: 41,095,296 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | KK | 27,893,000 | 162,000 | 13,041,000 | | A8s | 13,041,000 | 162,000 | 27,893,000 | The total is exact: 24 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. **KK against A8s read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | KK | 2.132 | 1.473 | 3.151 | 0.469 | | A8s | 0.469 | 3.151 | 1.473 | 2.132 | The last column is the smallest pot odds, written as a pot-to-call ratio, at which a call breaks even with this equity. ## Who is ahead on which flops Break the boards down by their first three cards and KK is strongest on low rainbow flops (nine high or lower) (76.42%) and weakest on monotone flops (63.50%). KK stays ahead on all five textures. **KK against A8s by flop texture, in percent** | Flop | Share of flops | KK wins | Ties | A8s wins | KK equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.867 | 67.431 | 0.178 | 32.391 | 67.520 | | Rainbow, nine or lower | 7.042 | 75.927 | 0.980 | 23.093 | 76.417 | | Two-tone | 46.545 | 66.102 | 0.333 | 33.565 | 66.269 | | Monotone | 5.212 | 62.294 | 2.416 | 35.290 | 63.502 | | Paired | 17.334 | 71.644 | 0.010 | 28.346 | 71.649 | 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, KK changes by -14.33 points (baseline 82.40%) and A8s by -30.01 points (baseline 61.94%). **KK and A8s 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 | | --- | --- | --- | --- | --- | | KK, all flops | 68.070 | 82.396 | -14.326 | 0.82613 | | KK, rainbow, ten or higher | 67.520 | 82.396 | -14.876 | 0.81946 | | KK, rainbow, nine or lower | 76.417 | 82.396 | -5.979 | 0.92744 | | KK, two-tone | 66.269 | 82.396 | -16.127 | 0.80427 | | KK, monotone | 63.502 | 82.396 | -18.894 | 0.77069 | | KK, paired | 71.649 | 82.396 | -10.747 | 0.86957 | | A8s, all flops | 31.930 | 61.944 | -30.014 | 0.51547 | | A8s, rainbow, ten or higher | 32.480 | 61.944 | -29.464 | 0.52434 | | A8s, rainbow, nine or lower | 23.583 | 61.944 | -38.361 | 0.38071 | | A8s, two-tone | 33.731 | 61.944 | -28.213 | 0.54454 | | A8s, monotone | 36.498 | 61.944 | -25.446 | 0.58921 | | A8s, paired | 28.351 | 61.944 | -33.593 | 0.45769 | ## Does a shared suit matter? Looking only at deals where the hands share a suit, KK has 68.37%; looking only at deals where they do not, 67.77%. KK does better with a shared suit, by 0.60 points. **KK against A8s by suit overlap, in percent** | Deals | Specific deals | Share of deals | KK wins | Ties | A8s wins | KK equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 50.00 | 68.152 | 0.435 | 31.413 | 68.370 | | No shared suit | 12 | 50.00 | 67.594 | 0.354 | 32.052 | 67.771 | ## How often this matchup comes up You will meet this exact matchup 0.0030% of the time in a random heads-up deal: 48 of 1,624,350, counting either seat order. ## A worked example Worked example: both players commit $100, so $200 sits in the middle. Over every board, KK's average share is $136.14 (a gain of $36.14) and A8s' is $63.86 (a loss of $36.14). In 1,000 deals of exactly this matchup, expect about 679 won outright by KK, about 317 won outright by A8s and about 4 split. ## The same matchup from the other side The mirror image, A8s against KK, is 31.93% to 68.07%, and its address redirects to this page. ## Keep exploring Open the calculator with KsKh against Ad8d 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 KsKh against Ad8d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=KsKh&p2=Ad8d) - [KK combos](https://georgelipoker.com/combos/kk.md) - [A8s combos](https://georgelipoker.com/combos/a8s.md) - [KK vs KTs](https://georgelipoker.com/equity/kk-vs-kts.md) - [KK vs KQo](https://georgelipoker.com/equity/kk-vs-kqo.md) - [QQ vs A8s](https://georgelipoker.com/equity/qq-vs-a8s.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 24 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 - [KK vs KTs: preflop equity](https://georgelipoker.com/equity/kk-vs-kts.md) - [KK vs KQo: preflop equity](https://georgelipoker.com/equity/kk-vs-kqo.md) - [QQ vs A8s: preflop equity](https://georgelipoker.com/equity/qq-vs-a8s.md)