--- title: "A6s vs A4s: preflop equity" url: "https://georgelipoker.com/equity/a6s-vs-a4s.md" canonical_url: "https://georgelipoker.com/equity/a6s-vs-a4s" last_updated: "2026-10-23" type: "reference" summary: "Who is ahead, A6s or A4s? A6s leads 56.96% to 43.04% before the flop, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/a6s-vs-a3s.md", "https://georgelipoker.com/equity/a6s-vs-qjo.md", "https://georgelipoker.com/equity/kto-vs-a4s.md"] --- # A6s vs A4s: preflop equity Who is ahead, A6s or A4s? A6s leads 56.96% to 43.04% before the flop, counted exactly over every board, with the split by flop type and suit. In equity, A6s against A4s stands at 56.96% to 43.04%, a gap of 13.92 points. ## A6s against A4s: the numbers **Exact preflop results for A6s against A4s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | A6s | 41.092 | 31.739 | 27.169 | 56.961 | | A4s | 27.169 | 31.739 | 41.092 | 43.039 | Each side holds one of the suited hands: A6s and A4s. Sharing a rank is the signature of a dominated hand, since the weaker hand is usually out-kicked when the shared rank shows up. The lead is steady rather than large, and the flop still has plenty of say in who wins. Ties are 31.74% of the outcomes here; each tied board gives both hands half the pot. A6s ranks number 31 of 169 starting hands, and A4s ranks number 35, by equity against a random hand. **Boards behind the percentages: 20,547,648 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | A6s | 8,443,000 | 6,522,000 | 5,583,000 | | A4s | 5,583,000 | 6,522,000 | 8,443,000 | Exact total: 12 deals times 1,712,304 boards. The other three counts come from the five-decimal percentages and are rounded to the nearest thousand, so read them as approximate. **A6s against A4s read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | A6s | 1.323 | 2.434 | 3.681 | 0.756 | | A4s | 0.756 | 3.681 | 2.434 | 1.323 | The last column is the smallest pot odds, written as a pot-to-call ratio, at which a call breaks even with this equity. ## Who is ahead on which flops Split by what the flop looks like, A6s peaks at 60.18% on low rainbow flops (nine high or lower) and bottoms out at 53.50% on paired flops. A6s stays ahead on all five textures. **A6s against A4s by flop texture, in percent** | Flop | Share of flops | A6s wins | Ties | A4s wins | A6s equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.526 | 40.201 | 35.629 | 24.170 | 58.016 | | Rainbow, nine or lower | 6.383 | 53.150 | 14.068 | 32.782 | 60.184 | | Two-tone | 46.543 | 43.742 | 27.344 | 28.914 | 57.414 | | Monotone | 5.215 | 44.414 | 22.188 | 33.398 | 55.508 | | Paired | 17.333 | 29.794 | 47.419 | 22.787 | 53.503 | 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 Relative to a random opponent, A6s changes by -2.95 points (baseline 59.91%) and A4s by -15.99 points (baseline 59.03%). **A6s and A4s 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 | | --- | --- | --- | --- | --- | | A6s, all flops | 56.961 | 59.906 | -2.945 | 0.95084 | | A6s, rainbow, ten or higher | 58.016 | 59.906 | -1.890 | 0.96845 | | A6s, rainbow, nine or lower | 60.184 | 59.906 | +0.278 | 1.00464 | | A6s, two-tone | 57.414 | 59.906 | -2.492 | 0.95840 | | A6s, monotone | 55.508 | 59.906 | -4.398 | 0.92658 | | A6s, paired | 53.503 | 59.906 | -6.403 | 0.89312 | | A4s, all flops | 43.039 | 59.034 | -15.995 | 0.72905 | | A4s, rainbow, ten or higher | 41.984 | 59.034 | -17.050 | 0.71118 | | A4s, rainbow, nine or lower | 39.816 | 59.034 | -19.218 | 0.67446 | | A4s, two-tone | 42.586 | 59.034 | -16.448 | 0.72138 | | A4s, monotone | 44.492 | 59.034 | -14.542 | 0.75367 | | A4s, paired | 46.497 | 59.034 | -12.537 | 0.78763 | ## Does a shared suit matter? Suits do not split this matchup, because no legal deal has the hands holding the same suit. **A6s against A4s by suit overlap, in percent** | Deals | Specific deals | Share of deals | A6s wins | Ties | A4s wins | A6s equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 0 | 0.00 | not possible | not possible | not possible | not possible | | No shared suit | 12 | 100.00 | 41.092 | 31.739 | 27.169 | 56.961 | ## How often this matchup comes up Counting specific cards, A6s against A4s appears in 12 of the 1,624,350 ordered heads-up deals (0.0007%), and in 24 when the seats are swapped too (0.0015%). ## A worked example Put $100 each into a $200 pot and deal every board once: A6s averages $113.92 back, ahead of its $100 by $13.92, while A4s averages $86.08, short of its $100 by $13.92. In 1,000 deals of exactly this matchup, expect about 411 won outright by A6s, about 272 won outright by A4s and about 317 split. ## The same matchup from the other side The reversed view, A4s against A6s, shows 43.04% for A4s and 56.96% for A6s. It is the same count, so it redirects here. ## Keep exploring Open the calculator with As6s against Ah4h 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 As6s against Ah4h in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=As6s&p2=Ah4h) - [A6s combos](https://georgelipoker.com/combos/a6s.md) - [A4s combos](https://georgelipoker.com/combos/a4s.md) - [A6s vs A3s](https://georgelipoker.com/equity/a6s-vs-a3s.md) - [A6s vs QJo](https://georgelipoker.com/equity/a6s-vs-qjo.md) - [KTo vs A4s](https://georgelipoker.com/equity/kto-vs-a4s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed The page is built from a full enumeration: 1,712,304 boards, every suit pattern of the 12 specific deals, both seven-card hands evaluated. A tie is worth half a win to each hand, and a board is tallied under each of its ten possible flops for the texture rows. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [A6s vs A3s: preflop equity](https://georgelipoker.com/equity/a6s-vs-a3s.md) - [A6s vs QJo: preflop equity](https://georgelipoker.com/equity/a6s-vs-qjo.md) - [KTo vs A4s: preflop equity](https://georgelipoker.com/equity/kto-vs-a4s.md)