--- title: "66 vs 75s: preflop equity" url: "https://georgelipoker.com/equity/66-vs-75s.md" canonical_url: "https://georgelipoker.com/equity/66-vs-75s" last_updated: "2026-10-23" type: "reference" summary: "66 is a big favorite over 75s before the flop: 66.29% to 33.71% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/66-vs-65s.md", "https://georgelipoker.com/equity/66-vs-54s.md", "https://georgelipoker.com/equity/a9s-vs-75s.md"] --- # 66 vs 75s: preflop equity 66 is a big favorite over 75s before the flop: 66.29% to 33.71% equity, counted exactly over every board, with the split by flop type and suit. Dealt all in against each other, 66 takes 66.29% of the pot on average and 75s takes the other 33.71%. ## 66 against 75s: the numbers **Exact preflop results for 66 against 75s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | 66 | 65.560 | 1.456 | 32.984 | 66.288 | | 75s | 32.984 | 1.456 | 65.560 | 33.712 | 66 is a pocket pair and 75s is a suited hand. The pair is ahead of one card and behind the other, so the board decides how that plays out. A lead of 32.58 points is large but not decisive: 75s still takes about 330 of every 1,000 deals. A split pot comes up on 1.46% of boards, so the wins and the equity differ by half of that. For context, 66 sits at number 17 of 169 starting hands and 75s at number 124 when each is run against a random hand. **Boards behind the percentages: 41,095,296 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | 66 | 26,942,000 | 598,000 | 13,555,000 | | 75s | 13,555,000 | 598,000 | 26,942,000 | The board total is exact, 24 deals at 1,712,304 boards each. Won, tied and lost counts are rounded to the nearest thousand from the five-decimal percentages. **66 against 75s 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 | 1.966 | 1.525 | 3.032 | 0.509 | | 75s | 0.509 | 3.032 | 1.525 | 1.966 | 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 66 prefers rainbow flops topped by a ten or better, where it holds 69.64%, and likes low rainbow flops (nine high or lower) least, where it holds 59.39%. 66 stays ahead on all five textures. **66 against 75s by flop texture, in percent** | Flop | Share of flops | 66 wins | Ties | 75s wins | 66 equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 25.844 | 69.192 | 0.896 | 29.912 | 69.640 | | Rainbow, nine or lower | 5.065 | 59.152 | 0.473 | 40.375 | 59.389 | | Two-tone | 46.545 | 64.408 | 0.782 | 34.810 | 64.799 | | Monotone | 5.212 | 60.678 | 2.888 | 36.434 | 62.122 | | Paired | 17.334 | 66.578 | 3.957 | 29.465 | 68.557 | Rainbow flops have three suits, two-tone flops repeat one suit, monotone flops are all one suit, and paired flops repeat a rank. ## Compared with a random hand A random hand would give 66 63.29% and 75s 43.68%. Against each other the change is +3.00 points for 66 and -9.97 for 75s. **66 and 75s 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 | 66.288 | 63.285 | +3.003 | 1.04745 | | 66, rainbow, ten or higher | 69.640 | 63.285 | +6.355 | 1.10042 | | 66, rainbow, nine or lower | 59.389 | 63.285 | -3.896 | 0.93844 | | 66, two-tone | 64.799 | 63.285 | +1.514 | 1.02392 | | 66, monotone | 62.122 | 63.285 | -1.163 | 0.98162 | | 66, paired | 68.557 | 63.285 | +5.272 | 1.08331 | | 75s, all flops | 33.712 | 43.676 | -9.964 | 0.77187 | | 75s, rainbow, ten or higher | 30.360 | 43.676 | -13.316 | 0.69512 | | 75s, rainbow, nine or lower | 40.611 | 43.676 | -3.065 | 0.92982 | | 75s, two-tone | 35.201 | 43.676 | -8.475 | 0.80596 | | 75s, monotone | 37.878 | 43.676 | -5.798 | 0.86725 | | 75s, paired | 31.443 | 43.676 | -12.233 | 0.71991 | ## Does a shared suit matter? Suit overlap shows up in the numbers. With a suit in common 66 has 66.50% equity, and with none in common it has 66.07%. 66 does better with a shared suit, by 0.43 points. **66 against 75s by suit overlap, in percent** | Deals | Specific deals | Share of deals | 66 wins | Ties | 75s wins | 66 equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 50.00 | 65.756 | 1.495 | 32.749 | 66.503 | | No shared suit | 12 | 50.00 | 65.365 | 1.416 | 33.219 | 66.073 | ## How often this matchup comes up Counting specific cards, 66 against 75s appears in 24 of the 1,624,350 ordered heads-up deals (0.0015%), and in 48 when the seats are swapped too (0.0030%). ## A worked example Put $100 each into a $200 pot and deal every board once: 66 averages $132.58 back, ahead of its $100 by $32.58, while 75s averages $67.42, short of its $100 by $32.58. Think in thousands: about 656 of 1,000 go to 66, about 330 go to 75s, and about 14 are chopped. ## The same matchup from the other side The mirror image, 75s against 66, is 33.71% to 66.29%, and its address redirects to this page. ## Keep exploring Try 6s6h against 7d5d 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 7d5d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=6s6h&p2=7d5d) - [66 combos](https://georgelipoker.com/combos/66.md) - [75s combos](https://georgelipoker.com/combos/75s.md) - [66 vs 65s](https://georgelipoker.com/equity/66-vs-65s.md) - [66 vs 54s](https://georgelipoker.com/equity/66-vs-54s.md) - [A9s vs 75s](https://georgelipoker.com/equity/a9s-vs-75s.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 24 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 - [66 vs 65s: preflop equity](https://georgelipoker.com/equity/66-vs-65s.md) - [66 vs 54s: preflop equity](https://georgelipoker.com/equity/66-vs-54s.md) - [A9s vs 75s: preflop equity](https://georgelipoker.com/equity/a9s-vs-75s.md)