ATs vs 55 equity
Preflop, ATs beats 55 with exact equity 49.09% vs 50.91%: ATs wins 48.86%, 55 wins 50.67%, ties 0.47%. Computed by exhaustively enumerating all 10,273,824 deals.
| ATs Win | 48.86% |
|---|---|
| 55 Win | 50.67% |
| Tie | 0.47% |
| ATs Equity (win + tie/2) | 49.09% |
| 55 Equity (win + tie/2) | 50.91% |
| Boards enumerated | 10,273,824 |
| Suit combinations | 6 |
| Losing frequency | ATs loses 1 in 2.0 |
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, ATs or 55?
55 is ahead: ATs has 49.09% equity vs 50.91% (exact enumeration).
How often do ATs vs 55 tie?
Ties occur 0.47% of the time (48,456 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, “ATs vs 55 equity”, pailiku.com/matchups/ats-vs-55 (2026).