66 vs 55 equity
Preflop, 66 beats 55 with exact equity 81.36% vs 18.64%: 66 wins 80.39%, 55 wins 17.67%, ties 1.95%. Computed by exhaustively enumerating all 10,273,824 deals.
| 66 Win | 80.39% |
|---|---|
| 55 Win | 17.67% |
| Tie | 1.95% |
| 66 Equity (win + tie/2) | 81.36% |
| 55 Equity (win + tie/2) | 18.64% |
| Boards enumerated | 10,273,824 |
| Suit combinations | 6 |
| Losing frequency | 66 loses 1 in 5.7 |
Note: class-average values. Specific suit combinations (e.g. shared suits) shift the numbers by a few tenths of a percent.
FAQ
Who wins more often, 66 or 55?
66 is ahead: 66 has 81.36% equity vs 18.64% (exact enumeration).
How often do 66 vs 55 tie?
Ties occur 1.95% of the time (200,196 of 10,273,824 outcomes).
Are these numbers simulated?
No. All 10,273,824 board combinations are exhaustively enumerated — mathematically exact and reproducible.
Related
Figures from app/data/matchup-matrix (exhaustive engine scripts/gen-matchup-matrix.mjs, cross-validated against lib/poker-equity.ts)
Cite this page: Pailiku, “66 vs 55 equity”, pailiku.com/matchups/66-vs-55 (2026).