--- title: "KJo vs 55: preflop equity" url: "https://georgelipoker.com/equity/kjo-vs-55.md" canonical_url: "https://georgelipoker.com/equity/kjo-vs-55" last_updated: "2026-10-23" type: "reference" summary: "KJo vs 55 is close to a coin flip before the flop: 47.30% to 52.70% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/kjo-vs-qjs.md", "https://georgelipoker.com/equity/kjo-vs-k9s.md", "https://georgelipoker.com/equity/a9o-vs-55.md"] --- # KJo vs 55: preflop equity KJo vs 55 is close to a coin flip before the flop: 47.30% to 52.70% equity, counted exactly over every board, with the split by flop type and suit. Over all 1,712,304 boards that can follow this deal, 55 finishes with 52.70% of the pot and KJo with 47.30%. ## KJo against 55: the numbers **Exact preflop results for KJo against 55, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | KJo | 47.023 | 0.546 | 52.431 | 47.296 | | 55 | 52.431 | 0.546 | 47.023 | 52.704 | The matchup pits an offsuit hand against a pocket pair. This is a pair against two overcards, a matchup that stays close because the other hand only needs one of its ranks to appear. With only 5.40 points between them, the board decides this matchup far more than the cards in hand. About 0.55% of boards chop the pot, which is why equity sits slightly above the win figure for both hands. Ranked by equity against a random hand, KJo is number 26 of the 169 starting hands and 55 is number 27. **Boards behind the percentages: 123,285,888 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | KJo | 57,973,000 | 673,000 | 64,640,000 | | 55 | 64,640,000 | 673,000 | 57,973,000 | The board total is exact, 72 deals at 1,712,304 boards each. Won, tied and lost counts are rounded to the nearest thousand from the five-decimal percentages. **KJo against 55 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 | 0.897 | 2.127 | 1.907 | 1.114 | | 55 | 1.114 | 1.907 | 2.127 | 0.897 | 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 The flop changes the picture. 55 does best on low rainbow flops (nine high or lower), at 80.11%, and worst on rainbow flops topped by a ten or better, at 45.28%. On rainbow flops topped by a ten or better and monotone flops the numbers flip and KJo is the one ahead. **KJo against 55 by flop texture, in percent** | Flop | Share of flops | KJo wins | Ties | 55 wins | KJo equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.717 | 54.591 | 0.263 | 45.146 | 54.723 | | Rainbow, nine or lower | 6.314 | 19.489 | 0.808 | 79.703 | 19.893 | | Two-tone | 46.485 | 47.725 | 0.362 | 51.913 | 47.906 | | Monotone | 5.151 | 49.119 | 1.888 | 48.993 | 50.063 | | Paired | 17.333 | 43.754 | 0.951 | 55.295 | 44.230 | Read the flop types this way: rainbow has three suits, two-tone has two cards of one suit, monotone has three, and paired repeats a rank. ## Compared with a random hand How much does the opponent matter? Compared with its random-hand 60.57%, KJo changes by -13.27 points, and 55, from 60.33%, by -7.63. **KJo and 55 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 | 47.296 | 60.569 | -13.273 | 0.78086 | | KJo, rainbow, ten or higher | 54.723 | 60.569 | -5.846 | 0.90348 | | KJo, rainbow, nine or lower | 19.893 | 60.569 | -40.676 | 0.32844 | | KJo, two-tone | 47.906 | 60.569 | -12.663 | 0.79093 | | KJo, monotone | 50.063 | 60.569 | -10.506 | 0.82654 | | KJo, paired | 44.230 | 60.569 | -16.339 | 0.73024 | | 55, all flops | 52.704 | 60.325 | -7.621 | 0.87367 | | 55, rainbow, ten or higher | 45.277 | 60.325 | -15.048 | 0.75055 | | 55, rainbow, nine or lower | 80.107 | 60.325 | +19.782 | 1.32792 | | 55, two-tone | 52.094 | 60.325 | -8.231 | 0.86356 | | 55, monotone | 49.937 | 60.325 | -10.388 | 0.82780 | | 55, paired | 55.770 | 60.325 | -4.555 | 0.92449 | ## Does a shared suit matter? Of the deals of this matchup, 60 share a suit (55 at 52.62%) and 12 do not (53.13%). 55 does better with no shared suit, by 0.51 points. **KJo against 55 by suit overlap, in percent** | Deals | Specific deals | Share of deals | KJo wins | Ties | 55 wins | KJo equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 60 | 83.33 | 47.100 | 0.561 | 52.339 | 47.381 | | No shared suit | 12 | 16.67 | 46.636 | 0.473 | 52.891 | 46.872 | ## How often this matchup comes up Out of 1,624,350 ways to deal two seats two cards each, 72 are KJo in one seat and 55 in the other (0.0044%); with the seats swapped too, 144 (0.0089%). ## A worked example Worked example: both players commit $100, so $200 sits in the middle. Over every board, 55's average share is $105.40 (a gain of $5.40) and KJo's is $94.60 (a loss of $5.40). Scaled to 1,000 deals, that is roughly 524 wins for 55, 470 for KJo and 6 chopped pots. ## The same matchup from the other side Read it from the other side: 55 against KJo is the same matchup with the numbers swapped, so 55 holds 52.70% and KJo holds 47.30%. That address sends you back to this page. ## Keep exploring The calculator link fills in KsJh against 5d5c, a deal where the two hands share no suit. Change any card to test your own hand. The neighboring matchups below swap one of the two hands for one of similar strength. - [Open KsJh against 5d5c in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=KsJh&p2=5d5c) - [KJo combos](https://georgelipoker.com/combos/kjo.md) - [55 combos](https://georgelipoker.com/combos/55.md) - [KJo vs QJs](https://georgelipoker.com/equity/kjo-vs-qjs.md) - [KJo vs K9s](https://georgelipoker.com/equity/kjo-vs-k9s.md) - [A9o vs 55](https://georgelipoker.com/equity/a9o-vs-55.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 72 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 - [KJo vs QJs: preflop equity](https://georgelipoker.com/equity/kjo-vs-qjs.md) - [KJo vs K9s: preflop equity](https://georgelipoker.com/equity/kjo-vs-k9s.md) - [A9o vs 55: preflop equity](https://georgelipoker.com/equity/a9o-vs-55.md)