--- title: "66 vs 33: preflop equity" url: "https://georgelipoker.com/equity/66-vs-33.md" canonical_url: "https://georgelipoker.com/equity/66-vs-33" last_updated: "2026-10-23" type: "reference" summary: "66 is a big favorite over 33 before the flop: 81.45% to 18.55% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/66-vs-t8s.md", "https://georgelipoker.com/equity/66-vs-t9o.md", "https://georgelipoker.com/equity/a9s-vs-33.md"] --- # 66 vs 33: preflop equity 66 is a big favorite over 33 before the flop: 81.45% to 18.55% equity, counted exactly over every board, with the split by flop type and suit. Counting every board, the equity split is 81.45% for 66 and 18.55% for 33, so 66 leads by 62.90 points. ## 66 against 33: the numbers **Exact preflop results for 66 against 33, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | 66 | 80.452 | 1.996 | 17.552 | 81.450 | | 33 | 17.552 | 1.996 | 80.452 | 18.550 | 66 meets 33, and both are pocket pairs. Two pairs against each other is a one-way street: the lower pair needs one of its two remaining cards. A gap this wide means 33 is in trouble before the flop and has few good runouts. Of every 100 boards, about 2.00 are split pots, and the equity figures already include them. 66 ranks number 17 of 169 starting hands, and 33 ranks number 66, by equity against a random hand. **Boards behind the percentages: 61,642,944 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | 66 | 49,593,000 | 1,230,000 | 10,820,000 | | 33 | 10,820,000 | 1,230,000 | 49,593,000 | Exact total: 36 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. **66 against 33 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 | 4.391 | 1.243 | 5.697 | 0.228 | | 33 | 0.228 | 5.697 | 1.243 | 4.391 | The final column gives the least the pot must offer for each unit called for a call to break even at this equity. ## Who is ahead on which flops Break the boards down by their first three cards and 66 is strongest on paired flops (84.53%) and weakest on low rainbow flops (nine high or lower) (75.80%). 66 stays ahead on all five textures. **66 against 33 by flop texture, in percent** | Flop | Share of flops | 66 wins | Ties | 33 wins | 66 equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 25.844 | 81.997 | 1.170 | 16.833 | 82.582 | | Rainbow, nine or lower | 5.065 | 75.362 | 0.872 | 23.766 | 75.798 | | Two-tone | 46.363 | 80.298 | 1.103 | 18.599 | 80.850 | | Monotone | 5.152 | 74.664 | 3.082 | 22.254 | 76.205 | | Paired | 17.576 | 81.747 | 5.575 | 12.678 | 84.534 | 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 Each hand has a baseline against a random hand: 63.29% for 66, 53.69% for 33. Here the change is +18.16 and -35.14 points. **66 and 33 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 | 81.450 | 63.285 | +18.165 | 1.28703 | | 66, rainbow, ten or higher | 82.582 | 63.285 | +19.297 | 1.30492 | | 66, rainbow, nine or lower | 75.798 | 63.285 | +12.513 | 1.19772 | | 66, two-tone | 80.850 | 63.285 | +17.565 | 1.27755 | | 66, monotone | 76.205 | 63.285 | +12.920 | 1.20416 | | 66, paired | 84.534 | 63.285 | +21.249 | 1.33577 | | 33, all flops | 18.550 | 53.693 | -35.143 | 0.34548 | | 33, rainbow, ten or higher | 17.418 | 53.693 | -36.275 | 0.32440 | | 33, rainbow, nine or lower | 24.202 | 53.693 | -29.491 | 0.45075 | | 33, two-tone | 19.150 | 53.693 | -34.543 | 0.35666 | | 33, monotone | 23.795 | 53.693 | -29.898 | 0.44317 | | 33, paired | 15.466 | 53.693 | -38.227 | 0.28804 | ## Does a shared suit matter? The suit split reads 81.59% for 66 with a shared suit and 80.77% without one. 66 does better with a shared suit, by 0.82 points. **66 against 33 by suit overlap, in percent** | Deals | Specific deals | Share of deals | 66 wins | Ties | 33 wins | 66 equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 30 | 83.33 | 80.582 | 2.007 | 17.411 | 81.586 | | No shared suit | 6 | 16.67 | 79.800 | 1.942 | 18.258 | 80.771 | ## How often this matchup comes up Exactly 36 specific deals fit this matchup in one seat order, which is 0.0022% of 1,624,350; both orders together give 72, or 0.0044%. ## A worked example To see what the equity is worth, imagine $100 each in a $200 pot. 66 is worth $162.90 on average (+$62.90); 33 is worth $37.10 (-$62.90). Run 1,000 deals and the tally comes out near 804 for 66, 176 for 33 and 20 ties. ## The same matchup from the other side If you came looking for 33 against 66, the numbers are the same with the hands swapped: 18.55% and 81.45%. ## Keep exploring The calculator link fills in 6s6h against 3d3c, a deal where the two hands share no suit. Change any card to test your own hand. The neighboring matchups below swap one of the two hands for one of similar strength. - [Open 6s6h against 3d3c in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=6s6h&p2=3d3c) - [66 combos](https://georgelipoker.com/combos/66.md) - [33 combos](https://georgelipoker.com/combos/33.md) - [66 vs T8s](https://georgelipoker.com/equity/66-vs-t8s.md) - [66 vs T9o](https://georgelipoker.com/equity/66-vs-t9o.md) - [A9s vs 33](https://georgelipoker.com/equity/a9s-vs-33.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Each figure is a complete count over boards. Take the 36 specific deals, group them by suit pattern, deal all 1,712,304 boards against each, and compare the two seven-card hands. Equity counts a tie as half a win; the flop rows use every one of a board's ten flops. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [66 vs T8s: preflop equity](https://georgelipoker.com/equity/66-vs-t8s.md) - [66 vs T9o: preflop equity](https://georgelipoker.com/equity/66-vs-t9o.md) - [A9s vs 33: preflop equity](https://georgelipoker.com/equity/a9s-vs-33.md)