--- title: "66 vs A7s: preflop equity" url: "https://georgelipoker.com/equity/66-vs-a7s.md" canonical_url: "https://georgelipoker.com/equity/66-vs-a7s" last_updated: "2026-10-23" type: "reference" summary: "Who is ahead, 66 or A7s? 66 leads 53.71% to 46.29% before the flop, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/66-vs-a9o.md", "https://georgelipoker.com/equity/66-vs-kjo.md", "https://georgelipoker.com/equity/a9s-vs-a7s.md"] --- # 66 vs A7s: preflop equity Who is ahead, 66 or A7s? 66 leads 53.71% to 46.29% before the flop, counted exactly over every board, with the split by flop type and suit. Dealt all in against each other, 66 takes 53.71% of the pot on average and A7s takes the other 46.29%. ## 66 against A7s: the numbers **Exact preflop results for 66 against A7s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | 66 | 53.504 | 0.418 | 46.078 | 53.713 | | A7s | 46.078 | 0.418 | 53.504 | 46.287 | Here a pocket pair (66) meets a suited hand (A7s). One hand holds a pair and the other holds two cards that both outrank it, which keeps the equity closer than most people expect. With only 7.42 points between them, the board decides this matchup far more than the cards in hand. 0.42% of boards are ties, so the equity of each hand is its win rate plus half of that. The hand ranking puts 66 at 17 and A7s at 24 out of 169 starting hands. **Boards behind the percentages: 41,095,296 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | 66 | 21,988,000 | 172,000 | 18,936,000 | | A7s | 18,936,000 | 172,000 | 21,988,000 | 24 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. **66 against A7s read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | 66 | 1.160 | 1.869 | 2.170 | 0.862 | | A7s | 0.862 | 2.170 | 1.869 | 1.160 | 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 By flop texture, 66's equity runs from 52.16% on two-tone flops up to 63.10% on low rainbow flops (nine high or lower). 66 stays ahead on all five textures. **66 against A7s by flop texture, in percent** | Flop | Share of flops | 66 wins | Ties | A7s wins | 66 equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 25.220 | 52.553 | 0.228 | 47.219 | 52.667 | | Rainbow, nine or lower | 5.689 | 62.840 | 0.518 | 36.642 | 63.099 | | Two-tone | 46.545 | 52.025 | 0.261 | 47.714 | 52.156 | | Monotone | 5.212 | 51.371 | 2.450 | 46.179 | 52.596 | | Paired | 17.334 | 56.437 | 0.471 | 43.092 | 56.673 | A rainbow flop shows three suits, a two-tone flop repeats one suit, a monotone flop is a single suit, and a paired flop repeats a rank. ## Compared with a random hand A random hand would give 66 63.29% and A7s 60.98%. Against each other the change is -9.58 points for 66 and -14.69 for A7s. **66 and A7s 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 | | --- | --- | --- | --- | --- | | 66, all flops | 53.713 | 63.285 | -9.572 | 0.84875 | | 66, rainbow, ten or higher | 52.667 | 63.285 | -10.618 | 0.83222 | | 66, rainbow, nine or lower | 63.099 | 63.285 | -0.186 | 0.99706 | | 66, two-tone | 52.156 | 63.285 | -11.129 | 0.82414 | | 66, monotone | 52.596 | 63.285 | -10.689 | 0.83110 | | 66, paired | 56.673 | 63.285 | -6.612 | 0.89552 | | A7s, all flops | 46.287 | 60.984 | -14.697 | 0.75900 | | A7s, rainbow, ten or higher | 47.333 | 60.984 | -13.651 | 0.77615 | | A7s, rainbow, nine or lower | 36.901 | 60.984 | -24.083 | 0.60509 | | A7s, two-tone | 47.844 | 60.984 | -13.140 | 0.78453 | | A7s, monotone | 47.404 | 60.984 | -13.580 | 0.77732 | | A7s, paired | 43.327 | 60.984 | -17.657 | 0.71047 | ## Does a shared suit matter? Does suit overlap move the numbers? 66 has 53.89% when the hands share a suit and 53.54% when they do not. 66 does better with a shared suit, by 0.35 points. **66 against A7s by suit overlap, in percent** | Deals | Specific deals | Share of deals | 66 wins | Ties | A7s wins | 66 equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 50.00 | 53.660 | 0.458 | 45.882 | 53.889 | | No shared suit | 12 | 50.00 | 53.349 | 0.377 | 46.274 | 53.538 | ## How often this matchup comes up 66 against A7s is made up of 24 specific-card matchups in one seat order, 0.0015% of the 1,624,350 ordered deals, and 48 counting both seat orders, 0.0030%. ## A worked example With $100 from each side, the $200 pot is split on average as $107.42 for 66 and $92.58 for A7s; the first side gains $7.42 per all-in and the second gives up $7.42. Scaled to 1,000 deals, that is roughly 535 wins for 66, 461 for A7s and 4 chopped pots. ## The same matchup from the other side The mirror image, A7s against 66, is 46.29% to 53.71%, and its address redirects to this page. ## Keep exploring Try 6s6h against Ad7d 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 6s6h against Ad7d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=6s6h&p2=Ad7d) - [66 combos](https://georgelipoker.com/combos/66.md) - [A7s combos](https://georgelipoker.com/combos/a7s.md) - [66 vs A9o](https://georgelipoker.com/equity/66-vs-a9o.md) - [66 vs KJo](https://georgelipoker.com/equity/66-vs-kjo.md) - [A9s vs A7s](https://georgelipoker.com/equity/a9s-vs-a7s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Nothing here is simulated. The 24 deals of 66 against A7s fall into a few suit patterns, each dealt against all 1,712,304 boards, with both best five-card hands compared on every board. Ties give each hand half a win, and the flop rows count a board under each of its ten flops. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [66 vs A9o: preflop equity](https://georgelipoker.com/equity/66-vs-a9o.md) - [66 vs KJo: preflop equity](https://georgelipoker.com/equity/66-vs-kjo.md) - [A9s vs A7s: preflop equity](https://georgelipoker.com/equity/a9s-vs-a7s.md)