--- title: "ATo vs 43s: preflop equity" url: "https://georgelipoker.com/equity/ato-vs-43s.md" canonical_url: "https://georgelipoker.com/equity/ato-vs-43s" last_updated: "2026-10-23" type: "reference" summary: "ATo is a big favorite over 43s before the flop: 60.70% to 39.30% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/kjs-vs-43s.md", "https://georgelipoker.com/equity/ato-vs-53s.md", "https://georgelipoker.com/equity/a9s-vs-43s.md"] --- # ATo vs 43s: preflop equity ATo is a big favorite over 43s before the flop: 60.70% to 39.30% equity, counted exactly over every board, with the split by flop type and suit. Averaged over every possible board, ATo is ahead of 43s by 21.40 points of equity, 60.70% to 39.30%. ## ATo against 43s: the numbers **Exact preflop results for ATo against 43s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | ATo | 60.443 | 0.512 | 39.045 | 60.699 | | 43s | 39.045 | 0.512 | 60.443 | 39.301 | Here an offsuit hand (ATo) meets a suited hand (43s). The two hands share no rank, which makes this a pure matchup of card strength, straight chances and flush chances. A 21.40 point lead is real, and 43s still takes about 391 of every 1,000 deals outright. A split pot comes up on 0.51% of boards, so the wins and the equity differ by half of that. ATo ranks number 19 of 169 starting hands, and 43s ranks number 150, by equity against a random hand. **Boards behind the percentages: 82,190,592 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | ATo | 49,678,000 | 421,000 | 32,091,000 | | 43s | 32,091,000 | 421,000 | 49,678,000 | The board total is exact, 48 deals at 1,712,304 boards each. Won, tied and lost counts are rounded to the nearest thousand from the five-decimal percentages. **ATo 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) | | --- | --- | --- | --- | --- | | ATo | 1.544 | 1.654 | 2.561 | 0.647 | | 43s | 0.647 | 2.561 | 1.654 | 1.544 | 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, ATo's equity runs from 36.77% on low rainbow flops (nine high or lower) up to 68.21% on rainbow flops topped by a ten or better. Low rainbow flops (nine high or lower) favor 43s, the hand that is behind overall. **ATo against 43s by flop texture, in percent** | Flop | Share of flops | ATo wins | Ties | 43s wins | ATo equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.717 | 68.094 | 0.234 | 31.672 | 68.211 | | Rainbow, nine or lower | 6.313 | 36.356 | 0.825 | 62.819 | 36.769 | | Two-tone | 46.667 | 58.797 | 0.330 | 40.873 | 58.962 | | Monotone | 5.212 | 57.495 | 2.548 | 39.957 | 58.769 | | Paired | 17.091 | 63.666 | 0.678 | 35.656 | 64.005 | 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 Against one random hand instead, ATo holds 62.72% and 43s holds 38.64%. Facing each other changes that by -2.02 points for ATo and +0.66 points for 43s. **ATo 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 | | --- | --- | --- | --- | --- | | ATo, all flops | 60.699 | 62.722 | -2.023 | 0.96775 | | ATo, rainbow, ten or higher | 68.211 | 62.722 | +5.489 | 1.08751 | | ATo, rainbow, nine or lower | 36.769 | 62.722 | -25.953 | 0.58622 | | ATo, two-tone | 58.962 | 62.722 | -3.760 | 0.94005 | | ATo, monotone | 58.769 | 62.722 | -3.953 | 0.93698 | | ATo, paired | 64.005 | 62.722 | +1.283 | 1.02046 | | 43s, all flops | 39.301 | 38.642 | +0.659 | 1.01705 | | 43s, rainbow, ten or higher | 31.789 | 38.642 | -6.853 | 0.82265 | | 43s, rainbow, nine or lower | 63.231 | 38.642 | +24.589 | 1.63633 | | 43s, two-tone | 41.038 | 38.642 | +2.396 | 1.06201 | | 43s, monotone | 41.231 | 38.642 | +2.589 | 1.06700 | | 43s, paired | 35.995 | 38.642 | -2.647 | 0.93150 | ## Does a shared suit matter? Two kinds of deal exist here. In 24 of them the hands share a suit and ATo holds 61.40%. In 24 they do not, and it holds 60.00%. ATo does better with a shared suit, by 1.40 points. **ATo against 43s by suit overlap, in percent** | Deals | Specific deals | Share of deals | ATo wins | Ties | 43s wins | ATo equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 24 | 50.00 | 61.123 | 0.549 | 38.328 | 61.397 | | No shared suit | 24 | 50.00 | 59.763 | 0.476 | 39.761 | 60.001 | ## How often this matchup comes up ATo against 43s is made up of 48 specific-card matchups in one seat order, 0.0030% of the 1,624,350 ordered deals, and 96 counting both seat orders, 0.0059%. ## A worked example Take a $200 pot built from $100 each. ATo's equity of 60.70% is worth $121.40, a $21.40 edge, and 43s' 39.30% is worth $78.60, which is $21.40 under its stake. In 1,000 deals of exactly this matchup, expect about 604 won outright by ATo, about 391 won outright by 43s and about 5 split. ## The same matchup from the other side If you came looking for 43s against ATo, the numbers are the same with the hands swapped: 39.30% and 60.70%. ## Keep exploring Try AsTh against 4d3d 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 AsTh against 4d3d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsTh&p2=4d3d) - [ATo combos](https://georgelipoker.com/combos/ato.md) - [43s combos](https://georgelipoker.com/combos/43s.md) - [KJs vs 43s](https://georgelipoker.com/equity/kjs-vs-43s.md) - [ATo vs 53s](https://georgelipoker.com/equity/ato-vs-53s.md) - [A9s vs 43s](https://georgelipoker.com/equity/a9s-vs-43s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed This is an exact count with no sampling. For the 48 ways to deal one ATo and one 43s without reusing a card, grouped by suit pattern, every one of the 1,712,304 possible boards is dealt and both seven-card hands are compared. A tie counts as half a win in the equity column, and each board is counted once under each of its ten three-card flops. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [KJs vs 43s: preflop equity](https://georgelipoker.com/equity/kjs-vs-43s.md) - [ATo vs 53s: preflop equity](https://georgelipoker.com/equity/ato-vs-53s.md) - [A9s vs 43s: preflop equity](https://georgelipoker.com/equity/a9s-vs-43s.md)