--- title: "J9s vs 43s: preflop equity" url: "https://georgelipoker.com/equity/j9s-vs-43s.md" canonical_url: "https://georgelipoker.com/equity/j9s-vs-43s" last_updated: "2026-10-23" type: "reference" summary: "J9s is a big favorite over 43s before the flop: 63.81% to 36.19% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/jto-vs-43s.md", "https://georgelipoker.com/equity/j9s-vs-53s.md", "https://georgelipoker.com/equity/44-vs-43s.md"] --- # J9s vs 43s: preflop equity J9s is a big favorite over 43s before the flop: 63.81% to 36.19% equity, counted exactly over every board, with the split by flop type and suit. If J9s and 43s get all the chips in before the flop, J9s owns 63.81% of the pot in the long run and 43s owns 36.19%. ## J9s against 43s: the numbers **Exact preflop results for J9s against 43s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | J9s | 63.144 | 1.338 | 35.518 | 63.813 | | 43s | 35.518 | 1.338 | 63.144 | 36.187 | The matchup is suited hands on both sides, J9s against 43s. Neither hand shares a rank with the other, so this is a contest of high cards, connection and suits. A 27.62 point lead is real, and 43s still takes about 355 of every 1,000 deals outright. About 1.34% of boards chop the pot, which is why equity sits slightly above the win figure for both hands. By strength against a random hand, J9s holds place 55 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 | | --- | --- | --- | --- | | J9s | 17,299,000 | 367,000 | 9,731,000 | | 43s | 9,731,000 | 367,000 | 17,299,000 | 16 specific deals times 1,712,304 boards gives the exact total. The won, tied and lost counts are approximations from the five-decimal percentages, rounded to the nearest thousand. **J9s 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) | | --- | --- | --- | --- | --- | | J9s | 1.763 | 1.584 | 2.815 | 0.567 | | 43s | 0.567 | 2.815 | 1.584 | 1.763 | 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 J9s prefers rainbow flops topped by a ten or better, where it holds 67.55%, and likes low rainbow flops (nine high or lower) least, where it holds 50.33%. J9s stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **J9s against 43s by flop texture, in percent** | Flop | Share of flops | J9s wins | Ties | 43s wins | J9s equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 25.220 | 67.169 | 0.757 | 32.074 | 67.548 | | Rainbow, nine or lower | 5.689 | 49.939 | 0.781 | 49.280 | 50.330 | | Two-tone | 46.727 | 62.959 | 0.697 | 36.344 | 63.308 | | Monotone | 5.273 | 59.058 | 3.901 | 37.041 | 61.008 | | Paired | 17.091 | 63.368 | 3.341 | 33.291 | 65.038 | 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 Each hand has a baseline against a random hand: 55.66% for J9s, 38.64% for 43s. Here the change is +8.15 and -2.45 points. **J9s 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 | | --- | --- | --- | --- | --- | | J9s, all flops | 63.813 | 55.662 | +8.151 | 1.14644 | | J9s, rainbow, ten or higher | 67.548 | 55.662 | +11.886 | 1.21354 | | J9s, rainbow, nine or lower | 50.330 | 55.662 | -5.332 | 0.90421 | | J9s, two-tone | 63.308 | 55.662 | +7.646 | 1.13736 | | J9s, monotone | 61.008 | 55.662 | +5.346 | 1.09604 | | J9s, paired | 65.038 | 55.662 | +9.376 | 1.16845 | | 43s, all flops | 36.187 | 38.642 | -2.455 | 0.93647 | | 43s, rainbow, ten or higher | 32.452 | 38.642 | -6.190 | 0.83981 | | 43s, rainbow, nine or lower | 49.670 | 38.642 | +11.028 | 1.28539 | | 43s, two-tone | 36.692 | 38.642 | -1.950 | 0.94954 | | 43s, monotone | 38.992 | 38.642 | +0.350 | 1.00906 | | 43s, paired | 34.962 | 38.642 | -3.680 | 0.90477 | ## Does a shared suit matter? Split by suits, the deals give J9s 66.21% when the hands overlap in a suit and 63.02% when they do not. J9s does better with a shared suit, by 3.19 points. **J9s against 43s by suit overlap, in percent** | Deals | Specific deals | Share of deals | J9s wins | Ties | 43s wins | J9s equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 4 | 25.00 | 65.481 | 1.456 | 33.063 | 66.209 | | No shared suit | 12 | 75.00 | 62.365 | 1.299 | 36.336 | 63.015 | ## How often this matchup comes up Exactly 16 specific deals fit this matchup in one seat order, which is 0.0010% of 1,624,350; both orders together give 32, or 0.0020%. ## A worked example Try it with money: two players each put in $100 and the whole board runs out every possible way. J9s averages $127.62 from the $200, up $27.62; 43s averages $72.38, down $27.62. Run 1,000 deals and the tally comes out near 632 for J9s, 355 for 43s and 13 ties. ## The same matchup from the other side 43s against J9s adds nothing new: it is 36.19% for 43s and 63.81% for J9s, the same figures reversed. ## Keep exploring The calculator link fills in Js9s against 4h3h, 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 Js9s against 4h3h in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=Js9s&p2=4h3h) - [J9s combos](https://georgelipoker.com/combos/j9s.md) - [43s combos](https://georgelipoker.com/combos/43s.md) - [JTo vs 43s](https://georgelipoker.com/equity/jto-vs-43s.md) - [J9s vs 53s](https://georgelipoker.com/equity/j9s-vs-53s.md) - [44 vs 43s](https://georgelipoker.com/equity/44-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 - [JTo vs 43s: preflop equity](https://georgelipoker.com/equity/jto-vs-43s.md) - [J9s vs 53s: preflop equity](https://georgelipoker.com/equity/j9s-vs-53s.md) - [44 vs 43s: preflop equity](https://georgelipoker.com/equity/44-vs-43s.md)