AK vs A5s: Preflop Equity & Odds
| Hand | Win | Tie | Equity |
|---|---|---|---|
| AK (Ace-King) | 66.6% | 4.6% | 68.9% |
| A5s (Ace-Five Suited) | 28.9% | 4.6% | 31.1% |
Suited vs offsuit: AK
| Matchup | Win | Tie | Equity |
|---|---|---|---|
| AKs | 67.9% | 4.3% | 70.0% |
| AKo | 66.1% | 4.6% | 68.5% |
AK versus A5s is a textbook domination spot: both hands share their key card, so the weaker hand is fighting for just three outs. AK wins 66.6%, A5s wins 28.9%, and a substantial 4.6% of boards chop (when the shared card plays and kickers don't). Dominated spots like this are where most preflop money is lost — the weaker hand often can't fold preflop and can't outdraw postflop.
In equity terms — your long-run share of the pot counting split pots as half — AK holds 68.9% and A5s holds 31.1%. To make these numbers practical: facing a pot-sized all-in you need about 33% equity to call profitably, and a half-pot bet needs about 25%. Numbers on this page are exact, computed by full board enumeration (not simulation). Try any other hand or full ranges in the free equity calculator.
AK vs A5s FAQ
Who wins AK vs A5s preflop?
AK (Ace-King) is the favorite: it wins 66.6% of all runouts, while A5s (Ace-Five Suited) wins 28.9%. The remaining 4.6% are split pots. Counting splits as half, AK's preflop equity is 68.9%.
How often does A5s beat AK?
A5s wins 28.9% of the time all-in preflop against AK — roughly 1 in 3 — so it needs good pot odds or fold equity to get the money in profitably.
Are these AK vs A5s numbers exact?
Yes. They are computed by exhaustively enumerating every possible five-card board (1,712,304 boards per card combination) and averaging across all suit combinations of both hands — not by Monte Carlo simulation. Display values are rounded to one decimal place.
Run any matchup in the free equity calculator · AK VS AQ · AK VS AJ · AK VS AT