--- title: "KK vs JJ: preflop equity" url: "https://georgelipoker.com/equity/kk-vs-jj.md" canonical_url: "https://georgelipoker.com/equity/kk-vs-jj" last_updated: "2026-10-23" type: "reference" summary: "KK is a big favorite over JJ before the flop: 81.54% to 18.46% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/kk-vs-tt.md", "https://georgelipoker.com/equity/kk-vs-99.md", "https://georgelipoker.com/equity/qq-vs-jj.md"] --- # KK vs JJ: preflop equity KK is a big favorite over JJ before the flop: 81.54% to 18.46% equity, counted exactly over every board, with the split by flop type and suit. Dealt all in against each other, KK takes 81.54% of the pot on average and JJ takes the other 18.46%. ## KK against JJ: the numbers **Exact preflop results for KK against JJ, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | KK | 81.317 | 0.437 | 18.246 | 81.536 | | JJ | 18.246 | 0.437 | 81.317 | 18.464 | KK meets JJ, and both are pocket pairs. A pair against a smaller pair is the classic crush: the smaller pair needs one of its two remaining cards to make a set. That is a heavy lead: JJ needs the board to help it on most runouts and still falls behind far more often than not. 0.44% of boards are ties, so the equity of each hand is its win rate plus half of that. KK ranks number 2 of 169 starting hands, and JJ ranks number 4, by equity against a random hand. **Boards behind the percentages: 61,642,944 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | KK | 50,126,000 | 269,000 | 11,247,000 | | JJ | 11,247,000 | 269,000 | 50,126,000 | The total is exact: 36 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 JJ 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 | 4.416 | 1.230 | 5.481 | 0.226 | | JJ | 0.226 | 5.481 | 1.230 | 4.416 | 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, KK's equity runs from 75.85% on monotone flops up to 90.12% on low rainbow flops (nine high or lower). KK stays ahead on all five textures. **KK against JJ by flop texture, in percent** | Flop | Share of flops | KK wins | Ties | JJ wins | KK equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.138 | 78.047 | 0.150 | 21.803 | 78.122 | | Rainbow, nine or lower | 7.771 | 89.477 | 1.284 | 9.239 | 90.119 | | Two-tone | 46.363 | 80.333 | 0.417 | 19.250 | 80.542 | | Monotone | 5.152 | 74.959 | 1.773 | 23.268 | 75.845 | | Paired | 17.576 | 86.475 | 0.100 | 13.425 | 86.525 | A rainbow flop shows three suits, a two-tone flop repeats one suit, a monotone flop is a single suit, and a paired flop repeats a rank. ## Compared with a random hand Relative to a random opponent, KK changes by -0.86 points (baseline 82.40%) and JJ by -59.01 points (baseline 77.47%). **KK and JJ 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 | 81.536 | 82.396 | -0.860 | 0.98956 | | KK, rainbow, ten or higher | 78.122 | 82.396 | -4.274 | 0.94813 | | KK, rainbow, nine or lower | 90.119 | 82.396 | +7.723 | 1.09373 | | KK, two-tone | 80.542 | 82.396 | -1.854 | 0.97750 | | KK, monotone | 75.845 | 82.396 | -6.551 | 0.92049 | | KK, paired | 86.525 | 82.396 | +4.129 | 1.05011 | | JJ, all flops | 18.464 | 77.469 | -59.005 | 0.23834 | | JJ, rainbow, ten or higher | 21.878 | 77.469 | -55.591 | 0.28241 | | JJ, rainbow, nine or lower | 9.881 | 77.469 | -67.588 | 0.12755 | | JJ, two-tone | 19.458 | 77.469 | -58.011 | 0.25117 | | JJ, monotone | 24.155 | 77.469 | -53.314 | 0.31180 | | JJ, paired | 13.475 | 77.469 | -63.994 | 0.17394 | ## Does a shared suit matter? The suit split reads 81.67% for KK with a shared suit and 80.85% without one. KK does better with a shared suit, by 0.82 points. **KK against JJ by suit overlap, in percent** | Deals | Specific deals | Share of deals | KK wins | Ties | JJ wins | KK equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 30 | 83.33 | 81.446 | 0.453 | 18.101 | 81.672 | | No shared suit | 6 | 16.67 | 80.676 | 0.356 | 18.968 | 80.854 | ## How often this matchup comes up This page stands for 36 specific-card matchups (0.0022% of 1,624,350 ordered deals), or 72 once you count the seats both ways (0.0044%). ## A worked example Worked example: both players commit $100, so $200 sits in the middle. Over every board, KK's average share is $163.08 (a gain of $63.08) and JJ's is $36.92 (a loss of $63.08). Think in thousands: about 813 of 1,000 go to KK, about 183 go to JJ, and about 4 are chopped. ## The same matchup from the other side The reversed view, JJ against KK, shows 18.46% for JJ and 81.54% for KK. It is the same count, so it redirects here. ## Keep exploring Try KsKh against JdJc 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 KsKh against JdJc in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=KsKh&p2=JdJc) - [KK combos](https://georgelipoker.com/combos/kk.md) - [JJ combos](https://georgelipoker.com/combos/jj.md) - [KK vs TT](https://georgelipoker.com/equity/kk-vs-tt.md) - [KK vs 99](https://georgelipoker.com/equity/kk-vs-99.md) - [QQ vs JJ](https://georgelipoker.com/equity/qq-vs-jj.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed We counted every case. Each suit pattern of the 36 specific KK against JJ deals meets all 1,712,304 boards, and the better five-card hand wins; a split pot is half a win each. The flop table reads each board under all ten of its three-card flops. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [KK vs TT: preflop equity](https://georgelipoker.com/equity/kk-vs-tt.md) - [KK vs 99: preflop equity](https://georgelipoker.com/equity/kk-vs-99.md) - [QQ vs JJ: preflop equity](https://georgelipoker.com/equity/qq-vs-jj.md)