Mastering Double Down On a Blackjack

double down blackjack

In the exciting world of blackjack, knowing when to double down on a blackjack can make all the difference between winning big and losing it all. Doubling down is a strategic move that allows you to increase your bet, potentially raking in more winnings. But knowing when to do it is crucial. In this blog post, we’ll discuss what doubling down means, when to do it, and some common questions about this critical blackjack strategy.


When you double down in blackjack, you’re essentially betting on your initial two cards being strong enough to beat the dealer. To do this, you place an additional bet equal to your original one and receive just one more card from the dealer. If you have a pair of sevens, for instance, you can split the pair and then double down if you’d like.


When should I double down in blackjack?

The only chance you have to double down in blackjack is right after your first two cards are dealt. There are three specific scenarios where doubling down makes the most sense:

You have a hard nine, and the dealer’s face-up card is between two and six.

a hard nine is a combination of two cards that have a total value of nine but do not include an ace. This means that it can be made up of either 2 and 7, 3 and 6, or 4 and 5.

You have a hard 10 or 11, and the dealer’s face-up card is lower than yours.

If your initial hand in blackjack consists of any of the following pairs: 2 and 8, 2 and 9, 3 and 7, 3 and 8, 4 and 6, 4 and 7, 5 and 5, or 5 and 6, and the dealer’s card is lower than yours, the odds are in your favor. In this scenario, it is recommended to double down as you cannot exceed a hand value of 11. However, the dealer is obligated to draw cards until their hand reaches 17, increasing their risk of going over 21.

You have a soft 16, 17, or 18, and the dealer’s face-up card is between two and six.

If your starting hand in blackjack contains an ace and a 5, 6, or 7, and the dealer’s upcard is a 2, 3, 4, 5, or 6, it’s a favorable situation to double down. With the ace able to count as either one or eleven, there’s a high likelihood that you can enhance your hand by drawing just one more card.

In each of these cases, you can’t go bust and are more likely to win the hand than the dealer.

Blackjack double-down strategy chart

If you like having a brief and easy-to-follow reference for when it’s favorable to double down in blackjack, then take a look at the chart we have created below.

Blackjack strategy for 4-8 decks - dealer stands on 17
Blackjack strategy for 4-8 decks, dealer stands on 17


double down on a Blackjack strategy for 4-8 decks, dealer hits on 17
Blackjack strategy for 4-8 decks, dealer hits on 17


It’s essential to understand when not to double down in blackjack. Never double down when the dealer is showing an ace, as their chances of getting blackjack are too high. Additionally, avoid doubling down when you have anything higher than 11, as you risk going bust.


To double down in blackjack, simply place an equal stack of chips next to your initial bet. If necessary, inform the dealer of your intention to double down and use one finger to signal that you want one more card.


Before you decide to double down on blackjack, make sure to familiarize yourself with the casino’s rules, as they may vary. Some casinos only allow doubling down when your cards total 10 or 11. Also, pay attention to the value the dealer must hit up too, as it impacts how likely they are to go over 21.

Common Questions About Doubling Down in BLACKJACK

Below, we’ve answered some frequently asked questions about doubling down in blackjack:

Can you double down after splitting?

Some online casinos allow players to double down after splitting, but it’s uncommon. Use the same decision-making process you would for any other hand.

Can you double down after hitting?

Almost always, you cannot double down after hitting. This restriction prevents players from gaining too much of an edge over the casino.

Should you always double down on 11?

Generally, doubling down on 11 is a good strategy, especially for casual players.

Should you double down on 10?

This depends on the dealer’s face-up card. If it’s a 6 or lower, doubling down may be a feasible option.

How many cards do you get when you double down in blackjack?

When you double down, you receive only one extra card.

Can you double down on 21 in blackjack?

No, you cannot double down on 21.

Now that you know the ins and outs of doubling down in blackjack, it’s time to put your newfound knowledge to the test. Whether you’re practicing with free blackjack games or diving into the world of online blackjack for real money, understanding when to double down on a blackjack can significantly improve your gameplay and boost your winnings. Happy playing, and may the odds be ever in your favor!