A5s vs a button opening range: Equity & Strategy
Ace-Five Suited (A5s) has 52.1% equity all-in preflop against a button opening range — 586 combos, 44.2% of all starting hands. It wins 48.2% of runouts outright, loses 44.1% and chops 7.7%. These are exact figures from full board enumeration against every unblocked combo in the range, not a simulation.
| Side | Win | Chop | Equity |
|---|---|---|---|
| A5s | 48.2% | 7.7% | 52.1% |
| a button opening range | 44.1% | 7.7% | 47.9% |
The range this is computed against
The button is the widest legitimate opening range in poker — guaranteed position for the rest of the hand and only two blinds left to act, so close to 45% of all hands open profitably: every pair, every suited ace and king, most suited queens and jacks, all the suited connectors and gappers, and offsuit aces all the way down to A2o.
BTN open — 586 combos, 44.2% of all starting hands: AA, KK, QQ, JJ, TT, 99, 88, 77, 66, 55, 44, 33, 22, AKs, AQs, AJs, ATs, A9s, A8s, A7s, A6s, A5s, A4s, A3s, A2s, KQs, KJs, KTs, K9s, K8s, K7s, K6s, K5s, K4s, K3s, K2s, QJs, QTs, Q9s, Q8s, Q7s, Q6s, Q5s, Q4s, Q3s, Q2s, JTs, J9s, J8s, J7s, T9s, T8s, T7s, T6s, 98s, 97s, 96s, 95s, 87s, 86s, 85s, 76s, 75s, 74s, 65s, 64s, 63s, 54s, 53s, 52s, 43s, AKo, AQo, AJo, ATo, A9o, A8o, A7o, A6o, A5o, A4o, A3o, A2o, KQo, KJo, KTo, K9o, QJo, QTo, Q9o, JTo, J9o, T9o, 98o
After card removal, 520 of those 586 combos are still available (66 are blocked by the cards A5s holds). A5s is ahead of 355 and behind 165.
Hardest parts of the range for A5s
| Hand | Combos | A5s equity |
|---|---|---|
| AA | 3 | 13.3% |
| AKs | 3 | 30.2% |
| AQs | 3 | 30.7% |
| AKo | 9 | 31.5% |
| AJs | 3 | 31.6% |
Easiest parts of the range for A5s
| Hand | Combos | A5s equity |
|---|---|---|
| K5s | 3 | 72.4% |
| 52s | 3 | 72.2% |
| Q5s | 3 | 72.1% |
| 53s | 3 | 70.7% |
| 95s | 3 | 70.7% |
A5s has 52.1% equity all-in preflop against a button opening range — 586 combos, 44.2% of all hands. Ace-Five Suited wins the pot outright 48.2% of the time, loses 44.1% and chops 7.7%. Your own two cards remove 66 of those combos before the flop is even dealt — a blocker effect this number already accounts for, because every combo containing one of your exact cards is stripped out of the range first. You are ahead of 355 of the 520 combos you can still be facing (68%), which is what a 52.1% number actually looks like hand by hand.
Where does the range come from? The button is the widest legitimate opening range in poker — guaranteed position for the rest of the hand and only two blinds left to act, so close to 45% of all hands open profitably: every pair, every suited ace and king, most suited queens and jacks, all the suited connectors and gappers, and offsuit aces all the way down to A2o. Broken down hand by hand, A5s does worst against AA (13.3%), AKs (30.2%) and AQs (30.7%) and best against K5s (72.4%), 52s (72.2%) and Q5s (72.1%). Across the whole range A5s's equity swings from 13.3% at the bottom to 72.4% at the top — the single 52.1% headline is the combo-weighted average of all of it.
The practical read on 52.1% against a button opening range: you can 3-bet for value or flat in position, but this is not a stack-off-preflop holding against a 44.2% opener.
A5s vs BTN open FAQ
What is A5s's equity against a button opening range?
A5s has 52.1% equity all-in preflop against a button opening range — it wins 48.2% of runouts outright, loses 44.1% and chops 7.7%. The range holds 586 combos (44.2% of all hands); A5s blocks 66 of them, leaving 520 live. This is exact full board enumeration, not a simulation.
Which hands in a button opening range beat A5s?
A5s is behind 165 of the 520 live combos and ahead of the other 355. The worst matchups are AA (13.3%), AKs (30.2%) and AQs (30.7%); its best are K5s (72.4%), 52s (72.2%) and Q5s (72.1%). Every figure is exact, computed against that hand's unblocked combos only.
What hands are in a button opening range?
94 hand classes and 586 combos — 44.2% of the 1,326 possible starting hands. By combo count it is 13% pocket pairs (13 pairs, 78 combos), 40% suited hands (58 classes, 232 combos) and 47% offsuit hands (23 classes, 276 combos). That shape is why A5s runs at 52.1% against it rather than against a random hand.
Does A5s do better against a wider or a tighter range?
Wider, almost always. A5s has 53.4% equity against a loose-passive calling range (50.5% of hands) but 34.2% against a 4-betting range (3.2%). Equity against a range is mostly a question of how many weak hands the range still contains — which is why the same holding can be a monster against a button open and a fold against a 4-bet.
Run any hand vs range in the free equity calculator · All hand-vs-range matchups · a5s vs 3bet-value · a5s vs 4bet-range · a5s vs calling-station · aa vs utg-open · aa vs mp-open · aa vs co-open