A four flush is a hand containing four cards of the same suit, with one more card needed to complete a flush of five cards of that suit. In most poker variants, a four flush (also called a flush draw or incomplete flush) has no ranking value on its own and cannot win the pot at showdown unless it improves.
Four flushes are among the most common drawing hands in poker. They occur frequently in community card games like Texas Hold’em and Omaha, where players can use any combination of their hole cards and the community cards to form a flush. The strategic importance of a four flush lies not in its immediate value, but in its potential to improve and its relationship to pot odds and equity calculations.
In games where players are forced to make five-card hands, such as Five-Card Draw, a four flush represents work in progress. The appeal of chasing a four flush comes down to whether the pot is offering sufficient odds to justify the call or raise needed to see another card.
How Does Four Flush Work?
When you hold four cards of the same suit, you are one card away from making a flush. This incomplete hand exists during the decision-making phase before additional cards are revealed. In Texas Hold’em, if you have four hearts after the flop, the turn and river combined give you two more chances to hit the fifth heart needed to complete your flush.
The mechanics of a four flush involve understanding outs and odds. An out is any card that improves your hand. If you have four hearts and need one more to complete a flush, there are typically nine outs remaining in the deck (thirteen hearts total minus the four you hold). Some of those hearts may already be in opponents’ hands or on the board, but the nine-out approximation is standard in quick calculations at the table.
When calculating whether to call a bet with a four flush, players compare the pot odds (the amount they need to call relative to the pot size) against the odds of hitting their draw. If the pot is offering 4-to-1 odds and your chances of hitting the flush are roughly 4-to-1 against, the call is mathematically justified. This concept, known as pot odds, is fundamental to deciding whether to pursue a four flush.
Four Flush vs Other Draws
A four flush is stronger than an open-ended straight draw, which also has nine outs but is less likely to win even if completed. Flushes rank higher than straights in most poker games, making flush draws more valuable. A four flush is weaker than a made hand of any kind, including a pair or higher, and it is typically beaten by any four flush of a higher suit if both flushes are completed (though suit rankings vary by house rules and game variant).
When you hold both a four flush and a four straight (a draw to both a flush and a straight), you have what is known as a combination draw or double draw. This hand has more outs and greater equity than a single draw, making it a powerful holding worth playing more aggressively.
Key Takeaway
A four flush is valuable not as a made hand, but as a drawing hand with nine outs. Your decision to continue playing should depend entirely on pot odds, your position, and the likelihood that your flush will be the best hand if completed.
