KK vs 55 Odds: Pocket Kings vs Pocket Fives
Last updated: May 27, 2026
Pocket Kings (KK) wins 82.4% of the time against Pocket Fives (55) preflop. 55 wins 15.8% with ties at 1.8%. This is a clean domination matchup that mirrors KK vs 66 in headline equity — both sit at 82.4% for KK. 55 is even further from Broadway board textures than 66, reducing its secondary straight draw coverage. 55's only meaningful secondary equity source against KK is the wheel board (A-2-3-4-5), where 55 can combine set outs with a gutshot draw. KK must be cautious when a wheel texture appears; on all other boards, KK runs an overpair with 82%+ equity.
The Exact Number: 82.4% vs 15.8%
KK's 66.6-point advantage over 55 is among the largest in the pair domination spectrum. 55's 15.8% is one of the lowest equity totals for any pocket pair against any large pair — reflecting fives' minimal secondary draw coverage against a king-level overpair. The 1.8% tie rate is slightly elevated due to five-card board combinations that occasionally produce wheel straights splitting the pot.
KK Wins
82.4%
55 Wins
15.8%
Tie
1.8%
55's 15.8% equity breakdown: set equity (11.8% × ~88.6% = ~10.5%) plus wheel-draw boards (~1.8%) plus runner-runner scenarios (~0.9%) plus ties and miscellaneous (~2.6%) = 15.8%. The low 15.8% figure (vs 16.3% for TT vs 55) reflects the fact that KK's premium status creates a tighter range of boards that can meaningfully challenge it compared to TT.
Does the Suit Matter?
Suit combinations shift KK vs 55 equity by approximately 0.4 percentage points. 55's primary equity (set outs) is completely suit-independent. The small variation occurs when 55 shares a suit with one of KK's cards, providing marginal flush draw potential on suited board textures. The 1.8% tie rate holds constant across all configurations.
Preflop equity by suit combination
Post-Flop: When 55 Threatens KK
Post-flop in KK vs 55, the dynamics are clear: a five on the flop is catastrophic for KK; a king is game-over for 55; and the A-2-3 board is 55's only meaningful secondary equity scenario. KK's overpair position on 5-high boards is strong but not invincible — 55's flopped set is invisible to KK's overpair mentality.
Equity given specific flops and runouts
KK vs 55 vs KK vs 66: Same Equity, Different Structures
Both KK vs 55 and KK vs 66 sit at 82.4% for KK — identical headline equity with subtly different internal structures. Understanding why helps clarify the equity mechanics of pair domination:
55 equity sources vs KK
- Flop a set of fives (11.8%) × win from there (88.6%)~10.5%
- Wheel-draw boards (A-2-3) — gutshot/OESD equity~1.8%
- Runner-runner quads or full houses~0.9%
- Board-play ties (wheel straights split pot)~2.6%
- Total 55 equity15.8%
66 achieves the same 82.4% KK equity with a slightly different distribution: 66 wins slightly more often (16.0%) but ties less frequently (1.6%). 55 wins slightly less often (15.8%) but ties more often (1.8%). The higher tie rate for 55 reflects wheel straight boards (A-2-3-4-5) that occasionally produce split pots when both players play the board — KK and 55 both play the five-card board as a wheel. 55 is further from Broadway boards (K-Q-J-T-9 textures), so its straight draw coverage in the upper range is essentially zero.
The Definitive Pair-vs-Pair Matchup Reference Table
Every pocket pair domination matchup in one place. These numbers represent the standard baseline (no suit overlap). KK vs 55 (82.4%) is highlighted — tied for KK's highest equity matchup alongside KK vs 66.
Notable patterns: (1) KK vs 55 (82.4%) ties KK vs 66 (82.4%) as KK's highest equity vs lower pairs, despite 55 having lower absolute win% (15.8%) because the tie rate is higher (1.8%). (2) KK vs JJ (79.3%) is KK's lowest equity matchup — Broadway adjacency creates the most complex board interactions. (3) All TT vs low-pair matchups (TT vs 55 through TT vs 22) show the consistent 0.1-point per step progression as secondary draw equity decreases.
Definitions
Frequently Asked Questions
What are the exact KK vs 55 preflop odds?
Pocket Kings (KK) win 82.4% of the time against Pocket Fives (55) preflop. 55 wins 15.8% and ties account for 1.8%. This is a clean domination matchup — KK holds two of the highest-ranking cards in poker above 55's pair, leaving 55 with only two remaining fives as realistic winning outs. 55 flops a set approximately 11.8% of the time; when that set lands, 55 wins approximately 88.6% from that point. The 1.8% tie rate is slightly elevated compared to most KK vs lower pair matchups because fives contribute to wheel straights (A-2-3-4-5) that occasionally produce board-play splits.
How does KK vs 55 compare to KK vs 66?
KK vs 55 (KK wins 82.4%) and KK vs 66 (KK wins 82.4%) are identical in headline equity. However, there are subtle differences beneath the surface. KK vs 66 has the same 82.4% because 66 gains slight secondary equity from sixes appearing in more mid-range straights, while 55's lower secondary equity is offset by the slightly elevated tie rate at 1.8% (vs KK vs 66's 1.6%). The net result is the same 82.4% for KK, but the equity distribution differs: 55 wins 15.8% with 1.8% ties vs 66 winning 16.0% with 1.6% ties. 55 is further from Broadway boards (K-Q-J-T-9) than 66, reducing its broadway-adjacent straight draw coverage.
What is the wheel board danger zone for KK vs 55?
The wheel board (A-2-3-4-5) represents KK's primary post-flop danger zone against 55 beyond pure set scenarios. On an A-2-3 flop, 55 gains a gutshot draw to the wheel straight (any 4 completes A-2-3-4-5) in addition to its two set outs. KK has an overpair but is not the top pair on an ace-high board — the ace technically outranks both kings. KK's equity drops to approximately 67.8% on an A-2-3 flop when 55 has the gutshot draw. This is 55's single largest secondary equity gain vs KK. If a wheel board appears (low cards plus an ace), KK should proceed cautiously: 55's range on A-2-3 boards contains both sets and wheel draws simultaneously.
Should 55 call a KK 3-bet preflop and set-mine?
55 calling a KK 3-bet is almost always a mistake unless effective stacks are very deep. In a 3-bet pot, the preflop investment is significantly larger — often 9-12BB or more — making set-mining math much harder. For 55 to profitably set-mine at 9BB invested, it needs to win approximately 63-70BB+ when it hits its set (7-8x implied odds on the 9BB). Against KK specifically, implied odds are good in theory because KK will stack off with an overpair on low boards. However, the elevated preflop investment substantially reduces profitability. The rule: call 3-bets with 55 only at 200BB+ effective stacks, where the math clearly works. At 100BB stacks in a 3-bet pot, 55 should fold.
What is the set-over-set scenario for KK vs 55?
On K-5-x flops, both KK and 55 have flopped three-of-a-kind simultaneously — the classic cooler. KK has top set (three kings) and 55 has bottom set (three fives). KK wins 85.9% from this point. 55 can only win by making four fives (quads) or running out a full house of fives-over-kings that beats KK's full house of kings-over-fives. Both players will typically go all-in — neither can reasonably fold a flopped set — making K-5-x the definitive KK vs 55 cooler board. KK is the 85.9% favourite. K-5-x boards are relatively rare, making this cooler less common in practice than K-9-x (KK vs 99).
How does KK vs 55 differ strategically from TT vs 55?
KK vs 55 (KK wins 82.4%) and TT vs 55 (TT wins 82.0%) have different strategic dynamics despite similar equity. The key difference: KK is a premium hand that typically 3-bets and builds large pots preflop, making 55's set-mine in a 3-bet pot mathematically difficult. TT is a strong hand but more often opens and calls, keeping preflop investments smaller and making 55's set-mine more viable. Post-flop, both KK and TT have overpairs on 5-high boards and both are susceptible to 55's set. The critical difference is that KK faces no board where it is outranked except king-high boards with an ace (A-x-x), while TT faces overpair vulnerability on any board with a jack or higher. KK's position is slightly stronger post-flop for this reason.
How does KK vs 55 fit into the full pair-vs-pair equity spectrum?
KK vs 55 (82.4%) sits at the upper end of the pair domination spectrum, matching AA vs KK (82.4%) and KK vs 66 (82.4%) as the highest-equity matchups in the full reference table. KK's equity pattern against lower pairs is: KK vs QQ = 81.9%, KK vs JJ = 79.3% (note: lower due to Broadway adjacency), KK vs TT = 81.9%, KK vs 99 = 82.1%, KK vs 88 = 82.0%, KK vs 77 = 82.1%, KK vs 66 = 82.4%, KK vs 55 = 82.4%. The 82.4% equity for both KK vs 66 and KK vs 55 represents the upper bound in KK's pair domination spectrum. The full reference table is below.
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