--- title: "KJs vs A5s: preflop equity" url: "https://georgelipoker.com/equity/kjs-vs-a5s.md" canonical_url: "https://georgelipoker.com/equity/kjs-vs-a5s" last_updated: "2026-10-23" type: "reference" summary: "Who is ahead, KJs or A5s? A5s leads 57.17% to 42.83% before the flop, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/kjs-vs-a6s.md", "https://georgelipoker.com/equity/kjs-vs-kto.md", "https://georgelipoker.com/equity/a8s-vs-a5s.md"] --- # KJs vs A5s: preflop equity Who is ahead, KJs or A5s? A5s leads 57.17% to 42.83% before the flop, counted exactly over every board, with the split by flop type and suit. Dealt all in against each other, A5s takes 57.17% of the pot on average and KJs takes the other 42.83%. ## KJs against A5s: the numbers **Exact preflop results for KJs against A5s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | KJs | 42.571 | 0.522 | 56.907 | 42.832 | | A5s | 56.907 | 0.522 | 42.571 | 57.168 | KJs meets A5s, and both are suited hands. The two hands share no rank, which makes this a pure matchup of card strength, straight chances and flush chances. A 14.34 point lead is real, and KJs still takes about 426 of every 1,000 deals outright. About 0.52% 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 A5s holds place 30. **Boards behind the percentages: 27,396,864 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | KJs | 11,663,000 | 143,000 | 15,591,000 | | A5s | 15,591,000 | 143,000 | 11,663,000 | 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 A5s 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 | 0.749 | 2.349 | 1.757 | 1.335 | | A5s | 1.335 | 1.757 | 2.349 | 0.749 | 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 Split by what the flop looks like, A5s peaks at 75.35% on low rainbow flops (nine high or lower) and bottoms out at 50.95% on rainbow flops topped by a ten or better. A5s stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **KJs against A5s by flop texture, in percent** | Flop | Share of flops | KJs wins | Ties | A5s wins | KJs equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.867 | 48.985 | 0.124 | 50.891 | 49.047 | | Rainbow, nine or lower | 7.042 | 24.162 | 0.983 | 74.855 | 24.653 | | Two-tone | 46.727 | 43.857 | 0.287 | 55.856 | 44.000 | | Monotone | 5.273 | 43.691 | 3.437 | 52.872 | 45.409 | | Paired | 17.091 | 37.339 | 0.629 | 62.032 | 37.654 | 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 Each hand has a baseline against a random hand: 62.57% for KJs, 59.92% for A5s. Here the change is -19.74 and -2.75 points. **KJs and A5s 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 | 42.832 | 62.567 | -19.735 | 0.68458 | | KJs, rainbow, ten or higher | 49.047 | 62.567 | -13.520 | 0.78391 | | KJs, rainbow, nine or lower | 24.653 | 62.567 | -37.914 | 0.39403 | | KJs, two-tone | 44.000 | 62.567 | -18.567 | 0.70325 | | KJs, monotone | 45.409 | 62.567 | -17.158 | 0.72577 | | KJs, paired | 37.654 | 62.567 | -24.913 | 0.60182 | | A5s, all flops | 57.168 | 59.923 | -2.755 | 0.95402 | | A5s, rainbow, ten or higher | 50.953 | 59.923 | -8.970 | 0.85031 | | A5s, rainbow, nine or lower | 75.347 | 59.923 | +15.424 | 1.25740 | | A5s, two-tone | 56.000 | 59.923 | -3.923 | 0.93453 | | A5s, monotone | 54.591 | 59.923 | -5.332 | 0.91102 | | A5s, paired | 62.346 | 59.923 | +2.423 | 1.04044 | ## Does a shared suit matter? Split by suits, the deals give A5s 59.08% when the hands overlap in a suit and 56.53% when they do not. A5s does better with a shared suit, by 2.55 points. **KJs against A5s by suit overlap, in percent** | Deals | Specific deals | Share of deals | KJs wins | Ties | A5s wins | KJs equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 4 | 25.00 | 40.619 | 0.603 | 58.778 | 40.921 | | No shared suit | 12 | 75.00 | 43.222 | 0.494 | 56.284 | 43.469 | ## How often this matchup comes up KJs against A5s is made up of 16 specific-card matchups in one seat order, 0.0010% of the 1,624,350 ordered deals, and 32 counting both seat orders, 0.0020%. ## A worked example Worked example: both players commit $100, so $200 sits in the middle. Over every board, A5s' average share is $114.34 (a gain of $14.34) and KJs' is $85.66 (a loss of $14.34). Think in thousands: about 569 of 1,000 go to A5s, about 426 go to KJs, and about 5 are chopped. ## The same matchup from the other side One page covers both views. From A5s' side the equity is 57.17%, and from KJs' side it is 42.83%. ## Keep exploring Try KsJs against Ah5h 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 Ah5h in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=KsJs&p2=Ah5h) - [KJs combos](https://georgelipoker.com/combos/kjs.md) - [A5s combos](https://georgelipoker.com/combos/a5s.md) - [KJs vs A6s](https://georgelipoker.com/equity/kjs-vs-a6s.md) - [KJs vs KTo](https://georgelipoker.com/equity/kjs-vs-kto.md) - [A8s vs A5s](https://georgelipoker.com/equity/a8s-vs-a5s.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 A6s: preflop equity](https://georgelipoker.com/equity/kjs-vs-a6s.md) - [KJs vs KTo: preflop equity](https://georgelipoker.com/equity/kjs-vs-kto.md) - [A8s vs A5s: preflop equity](https://georgelipoker.com/equity/a8s-vs-a5s.md)