--- title: "JJ vs KJs: preflop equity" url: "https://georgelipoker.com/equity/jj-vs-kjs.md" canonical_url: "https://georgelipoker.com/equity/jj-vs-kjs" last_updated: "2026-10-23" type: "reference" summary: "JJ is a big favorite over KJs before the flop: 64.43% to 35.57% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/jj-vs-a8s.md", "https://georgelipoker.com/equity/jj-vs-kts.md", "https://georgelipoker.com/equity/tt-vs-kjs.md"] --- # JJ vs KJs: preflop equity JJ is a big favorite over KJs before the flop: 64.43% to 35.57% equity, counted exactly over every board, with the split by flop type and suit. Before any board card is dealt, JJ holds 64.43% equity against KJs, which leaves KJs with 35.57%. ## JJ against KJs: the numbers **Exact preflop results for JJ against KJs, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | JJ | 63.639 | 1.582 | 34.779 | 64.430 | | KJs | 34.779 | 1.582 | 63.639 | 35.570 | JJ and KJs are a pocket pair and a suited hand, in that order. The pair already holds one of the other hand's ranks, and that overlap cuts down the cards the other hand can pair with. A 28.86 point lead is real, and KJs still takes about 348 of every 1,000 deals outright. Of every 100 boards, about 1.58 are split pots, and the equity figures already include them. By strength against a random hand, JJ holds place 4 of 169 and KJs holds place 20. **Boards behind the percentages: 20,547,648 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | JJ | 13,076,000 | 325,000 | 7,146,000 | | KJs | 7,146,000 | 325,000 | 13,076,000 | The board total is exact, 12 deals at 1,712,304 boards each. Won, tied and lost counts are rounded to the nearest thousand from the five-decimal percentages. **JJ against KJs read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | JJ | 1.811 | 1.571 | 2.875 | 0.552 | | KJs | 0.552 | 2.875 | 1.571 | 1.811 | The final column gives the least the pot must offer for each unit called for a call to break even at this equity. ## Who is ahead on which flops JJ prefers low rainbow flops (nine high or lower), where it holds 82.36%, and likes rainbow flops topped by a ten or better least, where it holds 59.32%. JJ stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **JJ against KJs by flop texture, in percent** | Flop | Share of flops | JJ wins | Ties | KJs wins | JJ equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.011 | 58.400 | 1.829 | 39.771 | 59.315 | | Rainbow, nine or lower | 7.771 | 81.418 | 1.890 | 16.692 | 82.363 | | Two-tone | 46.236 | 61.070 | 1.678 | 37.252 | 61.909 | | Monotone | 5.151 | 59.083 | 2.584 | 38.333 | 60.375 | | Paired | 17.831 | 70.630 | 0.591 | 28.779 | 70.925 | Flop types: rainbow means three different suits, two-tone means one suit twice, monotone means one suit three times, paired means a repeated rank. ## Compared with a random hand The table below sets each hand against its own random-hand baseline: a change of -13.04 points for JJ, from 77.47%, and -27.00 for KJs, from 62.57%. **JJ and KJs 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 | | --- | --- | --- | --- | --- | | JJ, all flops | 64.430 | 77.469 | -13.039 | 0.83169 | | JJ, rainbow, ten or higher | 59.315 | 77.469 | -18.154 | 0.76566 | | JJ, rainbow, nine or lower | 82.363 | 77.469 | +4.894 | 1.06317 | | JJ, two-tone | 61.909 | 77.469 | -15.560 | 0.79915 | | JJ, monotone | 60.375 | 77.469 | -17.094 | 0.77934 | | JJ, paired | 70.925 | 77.469 | -6.544 | 0.91553 | | KJs, all flops | 35.570 | 62.567 | -26.997 | 0.56851 | | KJs, rainbow, ten or higher | 40.685 | 62.567 | -21.882 | 0.65026 | | KJs, rainbow, nine or lower | 17.637 | 62.567 | -44.930 | 0.28189 | | KJs, two-tone | 38.091 | 62.567 | -24.476 | 0.60880 | | KJs, monotone | 39.625 | 62.567 | -22.942 | 0.63332 | | KJs, paired | 29.075 | 62.567 | -33.492 | 0.46470 | ## Does a shared suit matter? Every legal deal of JJ against KJs leaves the hands with no suit in common, so the suit split does not apply here. **JJ against KJs by suit overlap, in percent** | Deals | Specific deals | Share of deals | JJ wins | Ties | KJs wins | JJ equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 0 | 0.00 | not possible | not possible | not possible | not possible | | No shared suit | 12 | 100.00 | 63.639 | 1.582 | 34.779 | 64.430 | ## How often this matchup comes up Exactly 12 specific deals fit this matchup in one seat order, which is 0.0007% of 1,624,350; both orders together give 24, or 0.0015%. ## A worked example To see what the equity is worth, imagine $100 each in a $200 pot. JJ is worth $128.86 on average (+$28.86); KJs is worth $71.14 (-$28.86). Out of 1,000 deals you should see around 636 outright wins for JJ, 348 for KJs, and 16 split pots. ## The same matchup from the other side Read it from the other side: KJs against JJ is the same matchup with the numbers swapped, so KJs holds 35.57% and JJ holds 64.43%. That address sends you back to this page. ## Keep exploring Try JsJh against KdJd 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 JsJh against KdJd in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=JsJh&p2=KdJd) - [JJ combos](https://georgelipoker.com/combos/jj.md) - [KJs combos](https://georgelipoker.com/combos/kjs.md) - [JJ vs A8s](https://georgelipoker.com/equity/jj-vs-a8s.md) - [JJ vs KTs](https://georgelipoker.com/equity/jj-vs-kts.md) - [TT vs KJs](https://georgelipoker.com/equity/tt-vs-kjs.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Method: exact enumeration. The 12 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 - [JJ vs A8s: preflop equity](https://georgelipoker.com/equity/jj-vs-a8s.md) - [JJ vs KTs: preflop equity](https://georgelipoker.com/equity/jj-vs-kts.md) - [TT vs KJs: preflop equity](https://georgelipoker.com/equity/tt-vs-kjs.md)