What is a Flush Draw in Poker?

What is a Flush Draw in Poker? What You Need to Know

• A flush draw in online poker is when a player has four cards of the same suit and needs just one more of that suit to complete a flush.
• Recognizing a flush draw is critical as it can potentially lead to a strong poker hand if the fifth card of the same suit is dealt.
• There are two main types of flush draws: the “nut flush draw,” which includes the Ace of the suit, and the “non-nut flush draw,” which does not.
• Deciding when to bet, call, or fold in a flush draw scenario depends on several factors, such as table position, pot odds, and your read on other players.
• A flush draw strategy is a dynamic part of casino poker gameplay that requires careful assessment of risk and reward, adding an extra layer of excitement to the game.

When I used to teach beginner’s poker classes, I liked to kick-off by asking if anyone had already played poker before. A handful of people would raise their hands.

“Keep your hand up,” I’d say, “if you’ve ever heard of a royal flush.”

Everyone’s hand would remain up in the air.

“Now keep your hand up if you’ve ever hit a royal flush,” I’d ask them — and inevitably, almost everyone’s hand would drop straight down. The answer was nearly no one.

So why are we talking about ‘royal flushes’ in an article that is supposed to teach you how to play a flush draw? This is actually lesson #1 — while the promise and possibility of making a flush is always on top of every poker player’s mind, the probability of hitting one is actually much lower.

There’s a thin line between ‘flush draws’ and ‘flush dreams.’

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What is a Flush Draw in Poker?

Let’s start at the beginning. What is a flush draw in poker?

• What’s a flush in Texas Hold ‘em? A flush happens when you have five cards of the same suit. For example, you could have two spades in your hand and the board has three spades.

• What a flush draw in poker? A standard flush draw means you only need one more card to complete your flush. In this case, perhaps you have two spades in your hand and the board has two spades, meaning you only need one more spade.

Different Types of Poker Flush Draws

To truly master ‘what is a flush draw,’ you’re also going to want to understand the different variations.

• Nut flush: a poker ‘nut flush’ is the best possible flush any player can have. Usually this means the ace-high flush, but it can also indicate a ‘straight flush,’ where five cards are the same suit but also consecutive. (Ex. 2??-3??-4??-5??-6??)
  • A ‘nut flush draw’ refers to the possibility of hitting the nut flush. You will commonly hear players say, “I flopped the nut flush draw!” The nut flush is particularly important because it can beat other players’ lower flushes. A player holding A??2?? will beat a player holding K??Q?? on 2??-7??-J??-5?-6?? because they have hit the nut flush. This is very unlucky for Player #2, because they have hit the second-nut-flush! (One rank lower than the nut flush).

• Runner-runner/backdoor flush: Normally people only talk about flush draws when they only need to hit one card of a suit to make their hand. But you can also hit a flush with two cards… although this is much rarer. Perhaps you have 8??9?? and the flop is A??K??Q?. In order to make a flush, both of the next cards would need to be a diamond. It’s a sneaky proposition known as going for ‘runner-runner’ or a ‘backdoor’ flush draw.

Identifying Flush Draw Opportunities – Learning the Mathematics

There are three times when you can spot a flush draw opportunity: before the flop, on the flop, and on the turn.

Before The Flop

If you are dealt two cards of the same suit, you are more likely to hit a flush, right? This is true… but it’s also a trap! Beginners tend to overestimate the value of their hand when they’re dealt two ‘suited’ cards (ex. Two diamonds, two clubs, etc.)

Do NOT play any two cards simply because they are suited

As a matter of fact, ‘suited’-ness only makes your hand 2-3% better.

Playing a hand just because it’s suited will get you in lots of trouble… and cause you to lose lots of money over time. A hand like K??7?? may look good, but don’t be fooled — it’s a losing proposition.

The biggest rookie mistake a new poker player can make is playing too many hands. For more on which hands you should play, take a look at one of our cheat sheets.

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On The Flop

The greatest chance you will have at making a flush is on the flop. You may even ‘flop’ a flush — but again, this is rarer than you may think.

The likelihood of flopping a flush is 1 out of 118 times.

Ouch. That’s not good. But our memories deceive us — it’s easy to think of that one time you did flop a flush, and play any two suited cards again in hopes of repeating. Don’t do it. That vast majority of the time, your cards will miss.

What you find, however, is that you don’t flop a flush… but flop a flush draw.

This is usually worth sticking around and calling a reasonable bet. What does the math say? If you’re on the flop and only need one more card to complete your flush, the likelihood of it happening on the turn or river card is 36%. That’s intriguing — especially if you can win a big pot. But don’t go broke chasing flushes.

Unless there’s an exorbitant amount of money in the middle — boosting your ‘pot odds’ — you shouldn’t gamble your whole stack trying to hit something that will complete 36% of the time at best (assuming none of the cards that make your flush will make one of your opponents an even higher hand, like a full house).

On The Turn

Let’s say you’ve made it to the turn and you still only need one more card… but now things are getting dicey. It was 36% to hit your hand on the flop because we assumed you would get to see both the turn and river card.

Now you only have one card left to save your hand — and your odds drop in half.

The likelihood now of you hitting your flush has dropped to merely 18%.

Unless you’re getting a great price to see the river card — you only need to call a very small bet — you should often fold here. Sometimes we need to cut our losses.

What about a backdoor flush draw?

If you have a backdoor flush draw on the flop, your chance of hitting it is only 4%. This is why you usually want to ignore backdoor flush draws unless you have other draws with them to improve your mathematical equity.

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How do I Use Flush Draw Math to my Strategic Advantage?

Now that we know the math, there are key gameplay adjustments we can make.

1. Be disciplined in hand selection. Do not play a hand just because the cards are the same suit.
2. Recognize that trying to hit flush draws is gambling (36% at best). Only call bets when you have a flush draw when you’re getting a good price — the bet size to continue is cheap, or the pot size you can win is large enough to make the gamble worth it (‘pot odds’).
3. Play ‘in-position’. When you are ‘in-position’ during a hand, meaning you get to act last, you can often check back and see the next card for free.
4. Learn to bluff. Even if your flush draw misses, effective bluffing can scare your opponents into a fold, and you win the hand regardless.
5. Price-out your opponents. If you believe one of your opponents is trying to outdraw you by hitting a flush, you can bet large to make it very expensive for them.

Final Thoughts: Maximizing Your Flush Draw Opportunities

Most beginners overvalue flush draws. It’s a major leak.

If you’re new to poker, your first priority should be learning exactly which cards to play, a ‘preflop chart’, followed by grasping mathematical outcomes.

What you will find is that suited hands probably played too big a part of your game. While chasing a flush can be tempting, the odds are usually not in your favor.

There are exceptions. Sometimes the bet size is incredibly cheap, or the pot size is so enormous it’s worth the risk. As you get more sophisticated in your poker game, you will also be able to use position to your advantage and play flush draws aggressively — allowing you to bluff your way out of situations when your cards don’t hit.

As a starting point, focus on understanding the different types of flush draws and their chances of hitting so you can make smarter decisions. Be selective with your hands, only chase draws when the odds are good, and use strategic betting to your advantage (and your opponents’ detriment).

Poker is about making the right choices. Knowing when to go for a flush or when to fold can greatly impact your success… and transform your win-rate.