--- title: "AKo vs 66: preflop equity" url: "https://georgelipoker.com/equity/ako-vs-66.md" canonical_url: "https://georgelipoker.com/equity/ako-vs-66" last_updated: "2026-10-23" type: "reference" summary: "Who is ahead, AKo or 66? 66 leads 54.99% to 45.01% before the flop, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/ako-vs-a9s.md", "https://georgelipoker.com/equity/ako-vs-ato.md", "https://georgelipoker.com/equity/ats-vs-66.md"] --- # AKo vs 66: preflop equity Who is ahead, AKo or 66? 66 leads 54.99% to 45.01% before the flop, counted exactly over every board, with the split by flop type and suit. Averaged over every possible board, 66 is ahead of AKo by 9.98 points of equity, 54.99% to 45.01%. ## AKo against 66: the numbers **Exact preflop results for AKo against 66, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | AKo | 44.817 | 0.389 | 54.794 | 45.011 | | 66 | 54.794 | 0.389 | 44.817 | 54.989 | AKo, an offsuit hand, plays 66, a pocket pair. A pair against two higher cards is the classic race: the pair is usually a small favorite or close to even, and each overcard that pairs is a way to take the lead. 66 leads by less than 10 points of equity, so the result of any one deal is close to a toss-up. Split pots make up 0.39% of the boards, and both equity figures count them as half a win each. Ranked by equity against a random hand, AKo is number 12 of the 169 starting hands and 66 is number 17. **Boards behind the percentages: 123,285,888 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | AKo | 55,253,000 | 480,000 | 67,553,000 | | 66 | 67,553,000 | 480,000 | 55,253,000 | The board total is exact, 72 deals at 1,712,304 boards each. Won, tied and lost counts are rounded to the nearest thousand from the five-decimal percentages. **AKo against 66 read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | AKo | 0.819 | 2.231 | 1.825 | 1.222 | | 66 | 1.222 | 1.825 | 2.231 | 0.819 | 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 Break the boards down by their first three cards and 66 is strongest on low rainbow flops (nine high or lower) (81.78%) and weakest on rainbow flops topped by a ten or better (47.82%). Rainbow flops topped by a ten or better favor AKo, the hand that is behind overall. **AKo against 66 by flop texture, in percent** | Flop | Share of flops | AKo wins | Ties | 66 wins | AKo equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.717 | 52.098 | 0.160 | 47.742 | 52.178 | | Rainbow, nine or lower | 6.314 | 17.809 | 0.817 | 81.374 | 18.217 | | Two-tone | 46.485 | 45.478 | 0.283 | 54.239 | 45.619 | | Monotone | 5.151 | 47.446 | 1.737 | 50.817 | 48.315 | | Paired | 17.333 | 41.716 | 0.447 | 57.837 | 41.939 | 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 Compared with a random opponent, this matchup shifts AKo from 65.32% by -20.31 points and 66 from 63.29% by -8.30 points. **AKo and 66 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 | | --- | --- | --- | --- | --- | | AKo, all flops | 45.011 | 65.320 | -20.309 | 0.68908 | | AKo, rainbow, ten or higher | 52.178 | 65.320 | -13.142 | 0.79881 | | AKo, rainbow, nine or lower | 18.217 | 65.320 | -47.103 | 0.27889 | | AKo, two-tone | 45.619 | 65.320 | -19.701 | 0.69839 | | AKo, monotone | 48.315 | 65.320 | -17.005 | 0.73967 | | AKo, paired | 41.939 | 65.320 | -23.381 | 0.64205 | | 66, all flops | 54.989 | 63.285 | -8.296 | 0.86891 | | 66, rainbow, ten or higher | 47.822 | 63.285 | -15.463 | 0.75566 | | 66, rainbow, nine or lower | 81.783 | 63.285 | +18.498 | 1.29230 | | 66, two-tone | 54.381 | 63.285 | -8.904 | 0.85930 | | 66, monotone | 51.685 | 63.285 | -11.600 | 0.81670 | | 66, paired | 58.061 | 63.285 | -5.224 | 0.91745 | ## Does a shared suit matter? Does suit overlap move the numbers? 66 has 54.91% when the hands share a suit and 55.39% when they do not. 66 does better with no shared suit, by 0.48 points. **AKo against 66 by suit overlap, in percent** | Deals | Specific deals | Share of deals | AKo wins | Ties | 66 wins | AKo equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 60 | 83.33 | 44.889 | 0.405 | 54.706 | 45.091 | | No shared suit | 12 | 16.67 | 44.457 | 0.312 | 55.231 | 44.613 | ## How often this matchup comes up This page stands for 72 specific-card matchups (0.0044% of 1,624,350 ordered deals), or 144 once you count the seats both ways (0.0089%). ## A worked example Put $100 each into a $200 pot and deal every board once: 66 averages $109.98 back, ahead of its $100 by $9.98, while AKo averages $90.02, short of its $100 by $9.98. Per 1,000 deals: 66 wins about 548, AKo wins about 448, and about 4 end in a split pot. ## The same matchup from the other side 66 against AKo adds nothing new: it is 54.99% for 66 and 45.01% for AKo, the same figures reversed. ## Keep exploring Open the calculator with AsKh against 6d6c 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 AsKh against 6d6c in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsKh&p2=6d6c) - [AKo combos](https://georgelipoker.com/combos/ako.md) - [66 combos](https://georgelipoker.com/combos/66.md) - [AKo vs A9s](https://georgelipoker.com/equity/ako-vs-a9s.md) - [AKo vs ATo](https://georgelipoker.com/equity/ako-vs-ato.md) - [ATs vs 66](https://georgelipoker.com/equity/ats-vs-66.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Method: exact enumeration. The 72 specific deals are grouped by suit pattern, each is run against all 1,712,304 boards, and both seven-card hands are scored. Equity adds half of every tie, and flop textures are tallied over the ten flops inside each board. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [AKo vs A9s: preflop equity](https://georgelipoker.com/equity/ako-vs-a9s.md) - [AKo vs ATo: preflop equity](https://georgelipoker.com/equity/ako-vs-ato.md) - [ATs vs 66: preflop equity](https://georgelipoker.com/equity/ats-vs-66.md)