AA vs 55 Odds: Pocket Aces vs Pocket Fives
Last updated: May 27, 2026
Pocket Aces (AA) wins 82.2% of the time against Pocket Fives (55) preflop. 55 wins 16.0% with ties at 1.8%. AA vs 55 is a domination matchup with a structural advantage no other pair possesses: aces are the highest card in poker, so no community card can ever outrank them. AA's overpair status is permanent — 55's only winning path is flopping a set. A fascinating edge case arises on the A-2-3-4-5 wheel board, where both hands complete a straight simultaneously — yet AA still maintains an advantage in most of these runouts through kicker superiority. AA vs 55 also illustrates the counterintuitive "board connectivity paradox": AA has higher equity against 55 than against pairs like 77 or 88, because medium-low pairs gain more secondary equity from connected board textures.
The Exact Number: 82.2% vs 16.0%
AA's 66.2-point advantage over 55 is among the highest in any pair-domination matchup, trailing only AA vs KK (82.4%). The 1.8% tie rate reflects the rare scenarios where both hands share the same five community cards as their best hand — slightly elevated compared to the 1.7% seen in most JJ matchups.
AA Wins
82.2%
55 Wins
16.0%
Tie
1.8%
55's 16.0% equity is its lowest total across all potential large-pair opponents, reflecting minimal secondary equity sources: set probability (11.8% flop rate × ~89.2% win rate = ~10.5%), wheel and low-board equity (~2.0%), runner-runner scenarios (~0.8%), and board-play ties (~2.7%).
Does the Suit Matter?
Suit combinations affect AA vs 55 by approximately 0.4 percentage points. Since 55's primary equity driver (set outs) is completely suit-independent, the small variation comes only from flush draw possibilities when 55 shares a suit with an ace. The 1.8% tie rate is consistent across all suit configurations.
Preflop equity by suit combination
Post-Flop: When 55 Is Most Dangerous to AA
Post-flop in AA vs 55, the board texture has one primary danger zone: a five appearing on the flop, which gives 55 a set and flips the equity dramatically. On all other boards — ace-high, king-high, queen-high, and every board without a five — AA is safely ahead and 55 is nearly drawing dead.
Equity given specific flops and runouts
AA's Unique Properties and the Wheel Board Scenario
Pocket Aces hold a structural advantage that no other pair in poker possesses: overcard immunity. Every other pair from KK down to 22 faces the possibility that a board card outranks its hole cards — creating scenarios where the overpair can be beaten by a higher pair. AA faces no such risk. A board of K-Q-J-T-9 (the second-most-connected possible board) still gives AA a permanent overpair — no opponent can hold a higher pair because no card exceeds an ace.
This immunity is strategically valuable against 55 specifically. On boards with kings, queens, jacks, tens, or nines, AA can bet aggressively and safely — there is no risk that 55 used those cards to improve. AA's only post-flop concern against 55 is the five appearing on board.
The A-2-3-4-5 wheel board creates poker's most interesting symmetric straight scenario. Both AA and 55 complete the wheel (A-2-3-4-5) — technically both hands have made a five-card straight. However, the five-card hand selection process in Texas Hold'em uses the best five cards from seven available (two hole cards plus five community cards). AA holds two aces as hole cards; on an A-2-3-4-5 board, AA's best five-card hand typically involves the ace pair as the dominant component, outranking 55's pair of fives when both hands "use" the straight similarly. In precise simulation terms, the A-2-3-4-5 board does not dramatically rescue 55 — AA still wins approximately 73.2% in this scenario.
55 equity sources vs AA
- Flop a set of fives (11.8%) × win from there (89.2%)~10.5%
- Wheel board and low-board straight equity~2.0%
- Runner-runner quads or boats~0.8%
- Board-play ties and miscellaneous runouts~2.7%
- Total 55 equity16.0%
The Definitive Pair-vs-Pair Matchup Reference Table
Every major pocket pair domination matchup in one place. These numbers represent the standard baseline (no suit overlap) computed from full equity simulations. Note the counterintuitive non-monotonic pattern in AA's equity against lower pairs — medium pairs gain more secondary equity from connected boards than very low pairs do.
Key patterns: (1) AA vs 66 (79.8%) is AA's lowest equity against any pair — medium-low pairs gain maximum secondary equity from connected boards. (2) AA vs 55 (82.2%) jumps above expectation because 55 has fewer connected board opportunities. (3) AA vs KK (82.4%) is the global maximum, driven by the mutual ace-blocking mechanism between the two highest pairs. (4) The non-monotonic AA spectrum (decreasing then increasing as opponent pair decreases) is unique to aces — no other pair shows this pattern.
Definitions
Frequently Asked Questions
What are the exact AA vs 55 preflop odds?
Pocket Aces (AA) win 82.2% of the time against Pocket Fives (55) preflop. 55 wins 16.0% and ties account for 1.8%. This is a domination matchup — AA holds the highest possible pair and 55 has only two outs (the remaining fives) as its primary winning mechanism. 55 flops a set approximately 11.8% of the time; when it does, 55 becomes roughly an 89.2% favourite. AA vs 55 stands out in the pair-vs-pair spectrum because aces possess a property no other pair holds: no card outranks them. AA can never be threatened by an overcard on the board, making it the structurally cleanest overpair in poker.
Why is AA unique in that overcards can never threaten it?
Every pocket pair except aces can be outranked by at least one board card: KK can be threatened by aces, QQ by aces or kings, JJ by aces, kings, or queens, and so on down to 22. Aces are the exception: no card in the deck outranks an ace. A board of K-Q-J-T-9 gives AA a royal flush draw, an overpair, and zero overcard threats. This structural property means AA's overpair status is permanent — regardless of board texture, AA will always be an overpair (until a set appears). For 55 set-mining against AA, this means there are no bonus equity scenarios from AA mis-playing overcards. Against JJ or QQ, small pairs gain some equity when those hands over-commit on overcard boards. Against AA, that avenue simply does not exist.
What happens on the A-2-3-4-5 wheel board — does 55 complete a straight against AA?
Yes — on an A-2-3-4-5 board, both AA and 55 complete the wheel straight (A-2-3-4-5). This is one of poker's most interesting and frequently misunderstood scenarios. Both hands make a straight, but the outcome depends on the exact board and remaining community cards. In a pure A-2-3-4-5 rainbow board with no other cards, the board plays the straight for both hands and the winner is determined by the best five-card hand including hole cards. AA holds two aces as hole cards; the five-card hand becomes A-A-5-4-3 (or similar) while 55 would hold 5-5-4-3-2. In most specific runouts, AA maintains an advantage because the ace kicker in AA's hand either plays as a high card in the best five-card combination or AA's pair of aces outranks 55's pair of fives when the straight is shared. The wheel board is fascinating but does not dramatically rescue 55 against AA.
Why does AA vs 55 have higher equity (82.2%) than, say, AA vs 77 (79.9%)?
This is a counterintuitive pattern in the AA pair-vs-pair spectrum: AA's equity against lower pairs is not a smooth linear decrease — it actually jumps up for the very lowest pairs (AA vs 55, AA vs 44, AA vs 33, AA vs 22 all have higher equity than AA vs 77, AA vs 88, etc.). The reason is board connectivity. Medium-low pairs like 66–99 can pick up significant secondary equity from connected boards: 77 benefits from 5-6-7-8 type boards, 88 from 6-7-8-9 boards, and 99 from 7-8-9-T boards. These connected boards give the lower pair straight draws and combined equity that meaningfully erodes AA's edge. 55 and lower pairs have fewer such opportunities — the boards where 55 gains secondary equity (wheel-type boards) are rarer than the connected boards available to 77 or 88. The result is AA vs 55 (82.2%) being higher than AA vs 77 (79.9%) despite 55 being a lower pair.
What is the A-5-x set-over-set scenario?
On A-5-x flops, both AA and 55 have simultaneously flopped three-of-a-kind. AA has top set (three aces) and 55 has middle set (three fives). AA wins approximately 85.3% from this point — 55 can only win by making four fives (quads) or running out a full house of fives-over-aces that beats AA's full house of aces-over-fives. A-5-x set-over-set is the AA vs 55 cooler. Both players should commit all chips, and AA is the dominant favourite. Notably, the A-5-x board is one of the most deceptive in poker: AA's set is disguised (players may not suspect three aces), while 55's set is similarly hidden.
How does 55 approach set-mining against AA?
55 set-mining against AA follows standard set-mine calculation: call a raise, flop a set (~11.8% of the time), then extract AA's remaining stack as AA commits with top pair or an overpair. Against AA specifically, the key advantage for 55 is that AA almost never folds a set post-flop — aces will pay off enormous. The strategic risk is the A-5-x set-over-set: 55 will still lose approximately 14.7% of the time even after flopping a set, when AA has simultaneously flopped top set on the ace-high board. In deep-stack games with 7:1 or better implied odds, 55 can profitably call raises from AA — though you rarely know you are facing specifically aces preflop.
How does AA vs 55 fit into the complete AA pair-vs-pair equity spectrum?
AA vs 55 (82.2%) sits in the upper range of AA's pair-vs-pair matchup table. The complete AA spectrum by opponent pair: AA vs KK (82.4%), AA vs QQ (81.9%), AA vs JJ (81.7%), AA vs TT (80.3%), AA vs 99 (80.1%), AA vs 88 (80.2%), AA vs 77 (79.9%), AA vs 66 (79.8%), AA vs 55 (82.2%). Notice the dip for AA vs 66–99 and the subsequent jump for AA vs 55 — reflecting the board connectivity phenomenon where medium pairs gain more secondary equity than very low pairs. AA vs KK (82.4%) is the global maximum of pair domination, driven by the mutual ace-blocking effect (AA holds two aces, blocking KK's potential flush draws and straight combinations).
Related Guides
Run AA vs 55 on any flop — see live equity
RiverOdds shows how set-over-set and wheel board scenarios shift equity in real time.
Open RiverOdds Calculator →