--- title: "KJs vs A2s: preflop equity" url: "https://georgelipoker.com/equity/kjs-vs-a2s.md" canonical_url: "https://georgelipoker.com/equity/kjs-vs-a2s" last_updated: "2026-10-23" type: "reference" summary: "Who is ahead, KJs or A2s? A2s leads 56.92% to 43.08% before the flop, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/kjs-vs-qto.md", "https://georgelipoker.com/equity/kjs-vs-44.md", "https://georgelipoker.com/equity/a8s-vs-a2s.md"] --- # KJs vs A2s: preflop equity Who is ahead, KJs or A2s? A2s leads 56.92% to 43.08% before the flop, counted exactly over every board, with the split by flop type and suit. Over all 1,712,304 boards that can follow this deal, A2s finishes with 56.92% of the pot and KJs with 43.08%. ## KJs against A2s: the numbers **Exact preflop results for KJs against A2s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | KJs | 42.802 | 0.555 | 56.643 | 43.079 | | A2s | 56.643 | 0.555 | 42.802 | 56.921 | The matchup is suited hands on both sides, KJs against A2s. The two hands share no rank, which makes this a pure matchup of card strength, straight chances and flush chances. A 13.84 point lead is real, and KJs still takes about 428 of every 1,000 deals outright. About 0.56% of boards chop the pot, which is why equity sits slightly above the win figure for both hands. In the ranking of all 169 starting hands, KJs is number 20 and A2s is number 46. **Boards behind the percentages: 27,396,864 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | KJs | 11,726,000 | 152,000 | 15,518,000 | | A2s | 15,518,000 | 152,000 | 11,726,000 | 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. **KJs against A2s 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 | 0.757 | 2.336 | 1.765 | 1.321 | | A2s | 1.321 | 1.765 | 2.336 | 0.757 | 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 By flop texture, A2s' equity runs from 50.72% on rainbow flops topped by a ten or better up to 74.70% on low rainbow flops (nine high or lower). A2s stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **KJs against A2s by flop texture, in percent** | Flop | Share of flops | KJs wins | Ties | A2s wins | KJs equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.867 | 49.219 | 0.124 | 50.657 | 49.281 | | Rainbow, nine or lower | 7.042 | 24.708 | 1.191 | 74.101 | 25.303 | | Two-tone | 46.727 | 44.125 | 0.321 | 55.554 | 44.286 | | Monotone | 5.273 | 43.891 | 3.452 | 52.657 | 45.617 | | Paired | 17.091 | 37.339 | 0.641 | 62.020 | 37.660 | Flop types: rainbow means three different suits, two-tone means one suit twice, monotone means one suit three times, paired means a repeated rank. ## Compared with a random hand How much does the opponent matter? Compared with its random-hand 62.57%, KJs changes by -19.49 points, and A2s, from 57.38%, by -0.46. **KJs and A2s 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 | 43.079 | 62.567 | -19.488 | 0.68853 | | KJs, rainbow, ten or higher | 49.281 | 62.567 | -13.286 | 0.78765 | | KJs, rainbow, nine or lower | 25.303 | 62.567 | -37.264 | 0.40441 | | KJs, two-tone | 44.286 | 62.567 | -18.281 | 0.70782 | | KJs, monotone | 45.617 | 62.567 | -16.950 | 0.72909 | | KJs, paired | 37.660 | 62.567 | -24.907 | 0.60191 | | A2s, all flops | 56.921 | 57.379 | -0.458 | 0.99202 | | A2s, rainbow, ten or higher | 50.719 | 57.379 | -6.660 | 0.88393 | | A2s, rainbow, nine or lower | 74.697 | 57.379 | +17.318 | 1.30182 | | A2s, two-tone | 55.714 | 57.379 | -1.665 | 0.97098 | | A2s, monotone | 54.383 | 57.379 | -2.996 | 0.94779 | | A2s, paired | 62.340 | 57.379 | +4.961 | 1.08646 | ## Does a shared suit matter? Of the deals of this matchup, 4 share a suit (A2s at 58.81%) and 12 do not (56.29%). A2s does better with a shared suit, by 2.52 points. **KJs against A2s by suit overlap, in percent** | Deals | Specific deals | Share of deals | KJs wins | Ties | A2s wins | KJs equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 4 | 25.00 | 40.874 | 0.638 | 58.488 | 41.193 | | No shared suit | 12 | 75.00 | 43.444 | 0.527 | 56.029 | 43.708 | ## How often this matchup comes up You will meet this exact matchup 0.0020% of the time in a random heads-up deal: 32 of 1,624,350, counting either seat order. ## A worked example Say each player puts $100 in before the flop, making a $200 pot. On average A2s takes back $113.84 of it, which is $13.84 more than it put in, and KJs takes back $86.16, $13.84 less than it put in. Run 1,000 deals and the tally comes out near 566 for A2s, 428 for KJs and 6 ties. ## The same matchup from the other side One page covers both views. From A2s' side the equity is 56.92%, and from KJs' side it is 43.08%. ## Keep exploring The calculator link fills in KsJs against Ah2h, 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 KsJs against Ah2h in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=KsJs&p2=Ah2h) - [KJs combos](https://georgelipoker.com/combos/kjs.md) - [A2s combos](https://georgelipoker.com/combos/a2s.md) - [KJs vs QTo](https://georgelipoker.com/equity/kjs-vs-qto.md) - [KJs vs 44](https://georgelipoker.com/equity/kjs-vs-44.md) - [A8s vs A2s](https://georgelipoker.com/equity/a8s-vs-a2s.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 16 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 - [KJs vs QTo: preflop equity](https://georgelipoker.com/equity/kjs-vs-qto.md) - [KJs vs 44: preflop equity](https://georgelipoker.com/equity/kjs-vs-44.md) - [A8s vs A2s: preflop equity](https://georgelipoker.com/equity/a8s-vs-a2s.md)