Straight Flush vs Full House: Which Wins?

A straight flush beats a full house in standard poker, every time. The straight flush sits at #2 on the ten-hand ladder; a full house — sometimes called a “full boat” — sits down at #4, with four of a kind wedged between them. So a full house never wins this matchup. It’s a rare, back-breaking cooler, but the rule is absolute.

The rule, stated plainly

• Straight flush = five cards in sequence, all one suit, e.g. 8♠ 7♠ 6♠ 5♠ 4♠.
• Full house = three of a kind plus a pair, e.g. K♣ K♦ K♥ 9♠ 9♦ (“kings full of nines”).

The straight flush wins. If you hold one, the only hand that beats you is a higher straight flush — and the ceiling of that group is the ace-high royal flush.

Why the straight flush ranks higher

Poker orders hands by rarity: the fewer ways a hand can be dealt, the higher it ranks. Count the exact combinations in a 52-card deck:

Hand	Ways to make it	Rank
Straight flush (incl. royal)	40	#2
Four of a kind	624	#3
Full house	3,744	#4

A full house is more than ninety times as common as a straight flush. Because it’s so much easier to make, it ranks well below — even though three-of-a-kind-plus-a-pair looks like a fortress.

A worked cooler example

The board reads 8♥ 6♠ 5♠ 4♠ 8♦.

• Player A holds 8♣ 6♦ → best five: 8♥ 8♦ 8♣ 6♠ 6♦ = eights full of sixes — a full house, and a big one.
• Player B holds 7♠ 3♠ → best five: 7♠ 6♠ 5♠ 4♠ 3♠ = seven-high straight flush.

Player A’s boat crushes any flush, straight, or trips at the table — yet Player B’s straight flush is #2 and the full house is #4, so Player B wins. This is the once-in-a-lifetime cooler where a full house still loses.

How each hand breaks ties

• Straight flush vs. straight flush: the higher top card wins. A king-high straight flush beats an eight-high one. Two straight flushes of identical rank are only possible through shared community cards, in which case the pot is split.
• Full house vs. full house: compare the trips first — kings full beats nines full, regardless of the pair. Only if the three-of-a-kind ties do you compare the pair. See what beats a full house for the full tie-break logic.

Just how rare is each hand?

Out of 2,598,960 possible five-card hands, the top of the ladder breaks down like this:

Hand	Combinations	Roughly 1 in
Straight flush (incl. royal)	40	64,974
Four of a kind	624	4,165
Full house	3,744	694

You’ll make a full house roughly once every 700 hands — often enough to feel routine. A straight flush is nearly a hundred times rarer, which is exactly why it sits two full rungs higher on the ranking chart.

Why a full house still plays like a giant

Even though it loses to a straight flush, a full house is effectively the nuts on most boards. Straight flushes require a very specific texture — connected and single-suited — so the vast majority of the time no straight flush is even possible, and your boat is unbeatable. The real danger to a full house is usually four of a kind or a bigger full house on a paired board, not the near-mythical straight flush. Learn to spot the difference: on a rainbow or disconnected board, get maximum value; only slow down when the board screams straight-flush potential.

The only three hands that beat a full house

The top of the ladder runs: royal flush → straight flush → four of a kind → full house → flush. So a full house is the fourth-strongest hand, and only three things beat it:

• Four of a kind (#3) — all four cards of one rank.
• Straight flush (#2) — five suited cards in sequence.
• Royal flush (#1) — the ace-high straight flush.

Everything else — a flush, a straight, trips, and below — loses to a full house. When you flop a boat you’re behind only three hands in the whole deck, and two of them require a connected, single-suited board to exist. For the neighboring matchup, see straight flush vs four of a kind, and for what a boat is, read full house poker meaning.

A common mix-up: full house vs. flush

Beginners often confuse the boat with a plain flush. A full house beats a flush comfortably — the boat is #4 and a flush is #5. A straight flush is a different animal: it combines a straight and a flush into one hand, which is what pushes it up to #2. Don’t let the shared word “flush” blur the two — a flush is five suited cards in any order, while a straight flush is five suited cards in sequence, and only the latter beats a full house.

Bottom line

A straight flush beats a full house — a “full boat” included — because it’s the far rarer hand, one of only forty possible versus 3,744 full houses. It’s a devastating cooler when it lands, but the order never bends. Study the whole ladder at the hand rankings hub, then take it to the Texas Hold’em felt.