--- title: "AJs vs KJs: preflop equity" url: "https://georgelipoker.com/equity/ajs-vs-kjs.md" canonical_url: "https://georgelipoker.com/equity/ajs-vs-kjs" last_updated: "2026-10-23" type: "reference" summary: "AJs is a big favorite over KJs before the flop: 71.27% to 28.73% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/ajs-vs-a8s.md", "https://georgelipoker.com/equity/ajs-vs-kts.md", "https://georgelipoker.com/equity/ako-vs-kjs.md"] --- # AJs vs KJs: preflop equity AJs is a big favorite over KJs before the flop: 71.27% to 28.73% equity, counted exactly over every board, with the split by flop type and suit. Averaged over every possible board, AJs is ahead of KJs by 42.54 points of equity, 71.27% to 28.73%. ## AJs against KJs: the numbers **Exact preflop results for AJs against KJs, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | AJs | 70.521 | 1.503 | 27.976 | 71.272 | | KJs | 27.976 | 1.503 | 70.521 | 28.728 | AJs meets KJs, and both are suited hands. Sharing a rank is the signature of a dominated hand, since the weaker hand is usually out-kicked when the shared rank shows up. AJs is the clear favorite, though KJs gets there on roughly one board in 3. A split pot comes up on 1.50% of boards, so the wins and the equity differ by half of that. By strength against a random hand, AJs holds place 11 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 | | --- | --- | --- | --- | | AJs | 14,490,000 | 309,000 | 5,748,000 | | KJs | 5,748,000 | 309,000 | 14,490,000 | The total is exact: 12 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. **AJs 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) | | --- | --- | --- | --- | --- | | AJs | 2.481 | 1.418 | 3.574 | 0.403 | | KJs | 0.403 | 3.574 | 1.418 | 2.481 | 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 By flop texture, AJs' equity runs from 64.11% on monotone flops up to 83.82% on low rainbow flops (nine high or lower). AJs stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **AJs against KJs by flop texture, in percent** | Flop | Share of flops | AJs wins | Ties | KJs wins | AJs equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.138 | 68.466 | 1.186 | 30.348 | 69.059 | | Rainbow, nine or lower | 7.771 | 82.928 | 1.776 | 15.296 | 83.816 | | Two-tone | 46.543 | 69.307 | 1.156 | 29.537 | 69.885 | | Monotone | 5.215 | 62.242 | 3.731 | 34.027 | 64.107 | | Paired | 17.333 | 73.454 | 2.063 | 24.483 | 74.486 | 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 AJs 65.39% and KJs 62.57%. Against each other the change is +5.88 points for AJs and -33.84 for KJs. **AJs 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 | | --- | --- | --- | --- | --- | | AJs, all flops | 71.272 | 65.393 | +5.879 | 1.08990 | | AJs, rainbow, ten or higher | 69.059 | 65.393 | +3.666 | 1.05606 | | AJs, rainbow, nine or lower | 83.816 | 65.393 | +18.423 | 1.28173 | | AJs, two-tone | 69.885 | 65.393 | +4.492 | 1.06869 | | AJs, monotone | 64.107 | 65.393 | -1.286 | 0.98033 | | AJs, paired | 74.486 | 65.393 | +9.093 | 1.13905 | | KJs, all flops | 28.728 | 62.567 | -33.839 | 0.45916 | | KJs, rainbow, ten or higher | 30.941 | 62.567 | -31.626 | 0.49453 | | KJs, rainbow, nine or lower | 16.184 | 62.567 | -46.383 | 0.25867 | | KJs, two-tone | 30.115 | 62.567 | -32.452 | 0.48132 | | KJs, monotone | 35.893 | 62.567 | -26.674 | 0.57367 | | KJs, paired | 25.514 | 62.567 | -37.053 | 0.40779 | ## Does a shared suit matter? Every legal deal of AJs against KJs leaves the hands with no suit in common, so the suit split does not apply here. **AJs against KJs by suit overlap, in percent** | Deals | Specific deals | Share of deals | AJs wins | Ties | KJs wins | AJs equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 0 | 0.00 | not possible | not possible | not possible | not possible | | No shared suit | 12 | 100.00 | 70.521 | 1.503 | 27.976 | 71.272 | ## How often this matchup comes up This page stands for 12 specific-card matchups (0.0007% of 1,624,350 ordered deals), or 24 once you count the seats both ways (0.0015%). ## A worked example Say each player puts $100 in before the flop, making a $200 pot. On average AJs takes back $142.54 of it, which is $42.54 more than it put in, and KJs takes back $57.46, $42.54 less than it put in. A thousand deals look like this: AJs takes 705, KJs takes 280, 15 are ties. ## The same matchup from the other side Read it from the other side: KJs against AJs is the same matchup with the numbers swapped, so KJs holds 28.73% and AJs holds 71.27%. That address sends you back to this page. ## Keep exploring Open the calculator with AsJs against KhJh already entered, a deal with no shared suit, and change any card to try your own hand. The matchups after it each swap one hand for a nearby one in the ranking. - [Open AsJs against KhJh in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsJs&p2=KhJh) - [AJs combos](https://georgelipoker.com/combos/ajs.md) - [KJs combos](https://georgelipoker.com/combos/kjs.md) - [AJs vs A8s](https://georgelipoker.com/equity/ajs-vs-a8s.md) - [AJs vs KTs](https://georgelipoker.com/equity/ajs-vs-kts.md) - [AKo vs KJs](https://georgelipoker.com/equity/ako-vs-kjs.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Nothing here is simulated. The 12 deals of AJs against KJs fall into a few suit patterns, each dealt against all 1,712,304 boards, with both best five-card hands compared on every board. Ties give each hand half a win, and the flop rows count a board under each of its ten flops. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [AJs vs A8s: preflop equity](https://georgelipoker.com/equity/ajs-vs-a8s.md) - [AJs vs KTs: preflop equity](https://georgelipoker.com/equity/ajs-vs-kts.md) - [AKo vs KJs: preflop equity](https://georgelipoker.com/equity/ako-vs-kjs.md)