--- title: "KJo vs J9s: preflop equity" url: "https://georgelipoker.com/equity/kjo-vs-j9s.md" canonical_url: "https://georgelipoker.com/equity/kjo-vs-j9s" last_updated: "2026-10-23" type: "reference" summary: "KJo is a big favorite over J9s before the flop: 68.69% to 31.31% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/kjo-vs-jto.md", "https://georgelipoker.com/equity/kjo-vs-t9s.md", "https://georgelipoker.com/equity/55-vs-j9s.md"] --- # KJo vs J9s: preflop equity KJo is a big favorite over J9s before the flop: 68.69% to 31.31% equity, counted exactly over every board, with the split by flop type and suit. Counting every board, the equity split is 68.69% for KJo and 31.31% for J9s, so KJo leads by 37.38 points. ## KJo against J9s: the numbers **Exact preflop results for KJo against J9s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | KJo | 67.283 | 2.813 | 29.904 | 68.690 | | J9s | 29.904 | 2.813 | 67.283 | 31.310 | KJo, an offsuit hand, plays J9s, a suited hand. Sharing a rank is the signature of a dominated hand, since the weaker hand is usually out-kicked when the shared rank shows up. KJo is the clear favorite, though J9s gets there on roughly one board in 3. The tie share is 2.81%: on those boards the pot is chopped and neither hand wins outright. By strength against a random hand, KJo holds place 26 of 169 and J9s holds place 55. **Boards behind the percentages: 61,642,944 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | KJo | 41,475,000 | 1,734,000 | 18,434,000 | | J9s | 18,434,000 | 1,734,000 | 41,475,000 | 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. **KJo against J9s read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | KJo | 2.194 | 1.486 | 3.344 | 0.456 | | J9s | 0.456 | 3.344 | 1.486 | 2.194 | 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 Across the five flop textures KJo's equity moves by 15.15 points, from 58.59% on low rainbow flops (nine high or lower) to 73.74% on rainbow flops topped by a ten or better. KJo stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **KJo against J9s by flop texture, in percent** | Flop | Share of flops | KJo wins | Ties | J9s wins | KJo equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.905 | 72.380 | 2.717 | 24.903 | 73.739 | | Rainbow, nine or lower | 7.042 | 57.828 | 1.532 | 40.640 | 58.594 | | Two-tone | 46.527 | 65.722 | 2.306 | 31.972 | 66.875 | | Monotone | 5.192 | 62.454 | 3.750 | 33.796 | 64.329 | | Paired | 17.334 | 69.732 | 4.546 | 25.722 | 72.005 | 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 Compared with a random opponent, this matchup shifts KJo from 60.57% by +8.12 points and J9s from 55.66% by -24.35 points. **KJo and J9s 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 | | --- | --- | --- | --- | --- | | KJo, all flops | 68.690 | 60.569 | +8.121 | 1.13408 | | KJo, rainbow, ten or higher | 73.739 | 60.569 | +13.170 | 1.21744 | | KJo, rainbow, nine or lower | 58.594 | 60.569 | -1.975 | 0.96739 | | KJo, two-tone | 66.875 | 60.569 | +6.306 | 1.10411 | | KJo, monotone | 64.329 | 60.569 | +3.760 | 1.06208 | | KJo, paired | 72.005 | 60.569 | +11.436 | 1.18881 | | J9s, all flops | 31.310 | 55.662 | -24.352 | 0.56250 | | J9s, rainbow, ten or higher | 26.261 | 55.662 | -29.401 | 0.47179 | | J9s, rainbow, nine or lower | 41.406 | 55.662 | -14.256 | 0.74388 | | J9s, two-tone | 33.125 | 55.662 | -22.537 | 0.59511 | | J9s, monotone | 35.671 | 55.662 | -19.991 | 0.64085 | | J9s, paired | 27.995 | 55.662 | -27.667 | 0.50295 | ## Does a shared suit matter? Of the deals of this matchup, 12 share a suit (KJo at 69.73%) and 24 do not (68.17%). KJo does better with a shared suit, by 1.56 points. **KJo against J9s by suit overlap, in percent** | Deals | Specific deals | Share of deals | KJo wins | Ties | J9s wins | KJo equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 33.33 | 68.277 | 2.908 | 28.815 | 69.731 | | No shared suit | 24 | 66.67 | 66.787 | 2.765 | 30.448 | 68.169 | ## How often this matchup comes up Exactly 36 specific deals fit this matchup in one seat order, which is 0.0022% of 1,624,350; both orders together give 72, or 0.0044%. ## A worked example To see what the equity is worth, imagine $100 each in a $200 pot. KJo is worth $137.38 on average (+$37.38); J9s is worth $62.62 (-$37.38). Think in thousands: about 673 of 1,000 go to KJo, about 299 go to J9s, and about 28 are chopped. ## The same matchup from the other side If you came looking for J9s against KJo, the numbers are the same with the hands swapped: 31.31% and 68.69%. ## Keep exploring KsJh against Jd9d is a ready-made deal for the calculator, with no suit in common between the hands. The neighboring matchups below replace one hand with another of similar strength. - [Open KsJh against Jd9d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=KsJh&p2=Jd9d) - [KJo combos](https://georgelipoker.com/combos/kjo.md) - [J9s combos](https://georgelipoker.com/combos/j9s.md) - [KJo vs JTo](https://georgelipoker.com/equity/kjo-vs-jto.md) - [KJo vs T9s](https://georgelipoker.com/equity/kjo-vs-t9s.md) - [55 vs J9s](https://georgelipoker.com/equity/55-vs-j9s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed We counted every case. Each suit pattern of the 36 specific KJo against J9s 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 - [KJo vs JTo: preflop equity](https://georgelipoker.com/equity/kjo-vs-jto.md) - [KJo vs T9s: preflop equity](https://georgelipoker.com/equity/kjo-vs-t9s.md) - [55 vs J9s: preflop equity](https://georgelipoker.com/equity/55-vs-j9s.md)