--- title: "KJs vs 43s: preflop equity" url: "https://georgelipoker.com/equity/kjs-vs-43s.md" canonical_url: "https://georgelipoker.com/equity/kjs-vs-43s" last_updated: "2026-10-23" type: "reference" summary: "KJs is a big favorite over 43s before the flop: 63.32% to 36.69% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/a8s-vs-43s.md", "https://georgelipoker.com/equity/kjs-vs-53s.md", "https://georgelipoker.com/equity/ato-vs-43s.md"] --- # KJs vs 43s: preflop equity KJs is a big favorite over 43s before the flop: 63.32% to 36.69% equity, counted exactly over every board, with the split by flop type and suit. In equity, KJs against 43s stands at 63.32% to 36.68%, a gap of 26.64 points. ## KJs against 43s: the numbers **Exact preflop results for KJs against 43s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | KJs | 62.932 | 0.765 | 36.303 | 63.315 | | 43s | 36.303 | 0.765 | 62.932 | 36.685 | Two suited hands meet here: KJs against 43s. With no overlap in ranks, every card that pairs one hand is a card that does not pair the other. KJs is ahead, but 43s is far from dead: it takes 363 of every 1,000 deals outright. About 0.77% of boards chop the pot, which is why equity sits slightly above the win figure for both hands. By strength against a random hand, KJs holds place 20 of 169 and 43s holds place 150. **Boards behind the percentages: 27,396,864 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | KJs | 17,241,000 | 210,000 | 9,946,000 | | 43s | 9,946,000 | 210,000 | 17,241,000 | Exact total: 16 deals times 1,712,304 boards. The other three counts come from the five-decimal percentages and are rounded to the nearest thousand, so read them as approximate. **KJs against 43s read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | KJs | 1.726 | 1.589 | 2.755 | 0.579 | | 43s | 0.579 | 2.755 | 1.589 | 1.726 | The last column is the break-even price: the pot odds a call needs to offer, as a ratio of pot to call. ## Who is ahead on which flops KJs prefers rainbow flops topped by a ten or better, where it holds 70.07%, and likes low rainbow flops (nine high or lower) least, where it holds 38.24%. 43s takes over on low rainbow flops (nine high or lower), so the favorite before the flop is the underdog on those boards. **KJs against 43s by flop texture, in percent** | Flop | Share of flops | KJs wins | Ties | 43s wins | KJs equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.595 | 69.912 | 0.307 | 29.781 | 70.066 | | Rainbow, nine or lower | 6.314 | 37.717 | 1.036 | 61.247 | 38.235 | | Two-tone | 46.727 | 62.393 | 0.414 | 37.193 | 62.600 | | Monotone | 5.273 | 58.616 | 3.715 | 37.669 | 60.473 | | Paired | 17.091 | 65.009 | 1.372 | 33.619 | 65.695 | 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 A random hand would give KJs 62.57% and 43s 38.64%. Against each other the change is +0.75 points for KJs and -1.96 for 43s. **KJs and 43s 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 | | --- | --- | --- | --- | --- | | KJs, all flops | 63.315 | 62.567 | +0.748 | 1.01196 | | KJs, rainbow, ten or higher | 70.066 | 62.567 | +7.499 | 1.11986 | | KJs, rainbow, nine or lower | 38.235 | 62.567 | -24.332 | 0.61110 | | KJs, two-tone | 62.600 | 62.567 | +0.033 | 1.00053 | | KJs, monotone | 60.473 | 62.567 | -2.094 | 0.96653 | | KJs, paired | 65.695 | 62.567 | +3.128 | 1.04999 | | 43s, all flops | 36.685 | 38.642 | -1.957 | 0.94936 | | 43s, rainbow, ten or higher | 29.934 | 38.642 | -8.708 | 0.77465 | | 43s, rainbow, nine or lower | 61.765 | 38.642 | +23.123 | 1.59839 | | 43s, two-tone | 37.400 | 38.642 | -1.242 | 0.96786 | | 43s, monotone | 39.527 | 38.642 | +0.885 | 1.02290 | | 43s, paired | 34.305 | 38.642 | -4.337 | 0.88776 | ## Does a shared suit matter? When the hands share a suit, KJs holds 65.65%; when they do not, it holds 62.54%. KJs does better with a shared suit, by 3.11 points. **KJs against 43s by suit overlap, in percent** | Deals | Specific deals | Share of deals | KJs wins | Ties | 43s wins | KJs equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 4 | 25.00 | 65.221 | 0.851 | 33.928 | 65.647 | | No shared suit | 12 | 75.00 | 62.169 | 0.736 | 37.095 | 62.537 | ## How often this matchup comes up Counting specific cards, KJs against 43s appears in 16 of the 1,624,350 ordered heads-up deals (0.0010%), and in 32 when the seats are swapped too (0.0020%). ## A worked example Put $100 each into a $200 pot and deal every board once: KJs averages $126.64 back, ahead of its $100 by $26.64, while 43s averages $73.36, short of its $100 by $26.64. Per 1,000 deals: KJs wins about 629, 43s wins about 363, and about 8 end in a split pot. ## The same matchup from the other side 43s versus KJs is this same page seen from the other hand: 36.68% for 43s, 63.32% for KJs. ## Keep exploring Try KsJs against 4h3h 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 KsJs against 4h3h in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=KsJs&p2=4h3h) - [KJs combos](https://georgelipoker.com/combos/kjs.md) - [43s combos](https://georgelipoker.com/combos/43s.md) - [A8s vs 43s](https://georgelipoker.com/equity/a8s-vs-43s.md) - [KJs vs 53s](https://georgelipoker.com/equity/kjs-vs-53s.md) - [ATo vs 43s](https://georgelipoker.com/equity/ato-vs-43s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Each figure is a complete count over boards. Take the 16 specific deals, group them by suit pattern, deal all 1,712,304 boards against each, and compare the two seven-card hands. Equity counts a tie as half a win; the flop rows use every one of a board's ten flops. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [A8s vs 43s: preflop equity](https://georgelipoker.com/equity/a8s-vs-43s.md) - [KJs vs 53s: preflop equity](https://georgelipoker.com/equity/kjs-vs-53s.md) - [ATo vs 43s: preflop equity](https://georgelipoker.com/equity/ato-vs-43s.md)