--- title: "A4s vs 43s: preflop equity" url: "https://georgelipoker.com/equity/a4s-vs-43s.md" canonical_url: "https://georgelipoker.com/equity/a4s-vs-43s" last_updated: "2026-10-23" type: "reference" summary: "A4s is a big favorite over 43s before the flop: 70.84% to 29.16% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/a3s-vs-43s.md", "https://georgelipoker.com/equity/a4s-vs-53s.md", "https://georgelipoker.com/equity/qts-vs-43s.md"] --- # A4s vs 43s: preflop equity A4s is a big favorite over 43s before the flop: 70.84% to 29.16% equity, counted exactly over every board, with the split by flop type and suit. The exact count puts A4s at 70.84% and 43s at 29.16% when the two hands see all five board cards. ## A4s against 43s: the numbers **Exact preflop results for A4s against 43s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | A4s | 69.755 | 2.174 | 28.071 | 70.842 | | 43s | 28.071 | 2.174 | 69.755 | 29.158 | Each side holds one of the suited hands: A4s and 43s. Because the hands share one rank, the one with the higher kicker is ahead when that rank pairs and the other hand is mostly drawing. A4s is the clear favorite, though 43s gets there on roughly one board in 3. About 2.17% 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, A4s is number 35 and 43s is number 150. **Boards behind the percentages: 20,547,648 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | A4s | 14,333,000 | 447,000 | 5,768,000 | | 43s | 5,768,000 | 447,000 | 14,333,000 | 12 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. **A4s 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) | | --- | --- | --- | --- | --- | | A4s | 2.430 | 1.434 | 3.562 | 0.412 | | 43s | 0.412 | 3.562 | 1.434 | 2.430 | 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 By flop texture, A4s' equity runs from 58.31% on low rainbow flops (nine high or lower) up to 75.49% on paired flops. A4s stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **A4s against 43s by flop texture, in percent** | Flop | Share of flops | A4s wins | Ties | 43s wins | A4s equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 25.254 | 74.262 | 1.252 | 24.486 | 74.888 | | Rainbow, nine or lower | 5.654 | 55.264 | 6.081 | 38.655 | 58.305 | | Two-tone | 46.543 | 68.278 | 1.857 | 29.865 | 69.207 | | Monotone | 5.215 | 61.750 | 4.500 | 33.750 | 64.000 | | Paired | 17.334 | 74.287 | 2.398 | 23.315 | 75.486 | 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 The table below sets each hand against its own random-hand baseline: a change of +11.81 points for A4s, from 59.03%, and -9.48 for 43s, from 38.64%. **A4s 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 | | --- | --- | --- | --- | --- | | A4s, all flops | 70.842 | 59.034 | +11.808 | 1.20002 | | A4s, rainbow, ten or higher | 74.888 | 59.034 | +15.854 | 1.26856 | | A4s, rainbow, nine or lower | 58.305 | 59.034 | -0.729 | 0.98765 | | A4s, two-tone | 69.207 | 59.034 | +10.173 | 1.17232 | | A4s, monotone | 64.000 | 59.034 | +4.966 | 1.08412 | | A4s, paired | 75.486 | 59.034 | +16.452 | 1.27869 | | 43s, all flops | 29.158 | 38.642 | -9.484 | 0.75457 | | 43s, rainbow, ten or higher | 25.112 | 38.642 | -13.530 | 0.64986 | | 43s, rainbow, nine or lower | 41.695 | 38.642 | +3.053 | 1.07901 | | 43s, two-tone | 30.793 | 38.642 | -7.849 | 0.79688 | | 43s, monotone | 36.000 | 38.642 | -2.642 | 0.93163 | | 43s, paired | 24.514 | 38.642 | -14.128 | 0.63439 | ## Does a shared suit matter? Every legal deal of A4s against 43s leaves the hands with no suit in common, so the suit split does not apply here. **A4s against 43s by suit overlap, in percent** | Deals | Specific deals | Share of deals | A4s wins | Ties | 43s wins | A4s equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 0 | 0.00 | not possible | not possible | not possible | not possible | | No shared suit | 12 | 100.00 | 69.755 | 2.174 | 28.071 | 70.842 | ## How often this matchup comes up Out of 1,624,350 ways to deal two seats two cards each, 12 are A4s in one seat and 43s in the other (0.0007%); with the seats swapped too, 24 (0.0015%). ## A worked example Try it with money: two players each put in $100 and the whole board runs out every possible way. A4s averages $141.68 from the $200, up $41.68; 43s averages $58.32, down $41.68. Scaled to 1,000 deals, that is roughly 697 wins for A4s, 281 for 43s and 22 chopped pots. ## The same matchup from the other side 43s versus A4s is this same page seen from the other hand: 29.16% for 43s, 70.84% for A4s. ## Keep exploring As4s against 4h3h is a ready-made deal for the calculator, with no suit in common between the hands. The neighboring matchups below replace one hand with another of similar strength. - [Open As4s against 4h3h in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=As4s&p2=4h3h) - [A4s combos](https://georgelipoker.com/combos/a4s.md) - [43s combos](https://georgelipoker.com/combos/43s.md) - [A3s vs 43s](https://georgelipoker.com/equity/a3s-vs-43s.md) - [A4s vs 53s](https://georgelipoker.com/equity/a4s-vs-53s.md) - [QTs vs 43s](https://georgelipoker.com/equity/qts-vs-43s.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 12 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 - [A3s vs 43s: preflop equity](https://georgelipoker.com/equity/a3s-vs-43s.md) - [A4s vs 53s: preflop equity](https://georgelipoker.com/equity/a4s-vs-53s.md) - [QTs vs 43s: preflop equity](https://georgelipoker.com/equity/qts-vs-43s.md)