How Many Decks Are in Blackjack?

If you’re new to blackjack, one of your first questions might be how many decks are involved in the game. While this varies depending on which casino is hosting the event and their rules for it, typically four to eight decks will be in play during an average blackjack game.

Understanding the number of decks used in blackjack is vital, as this directly affects both house edge and odds in general.

Casinos alter the number of decks used in their games for several reasons, including increasing their edge against players or discouraging card counting techniques.

Counting cards may not be illegal, but casinos often frown upon it and may ask you to leave if they suspect you of counting cards. It’s a widespread problem at casinos and could eventually cause them to lose money over time.

With multiple decks in play, it becomes challenging to keep an accurate count due to more cards to consider and knowing whether to hit, stand or double down.

As such, your count will need to change accordingly. Instead of using running counts alone to gauge your advantage, a new measure called the “true count” should be utilized instead.

Maintain an accurate true count to achieve accurate betting decisions, you should keep an accurate count of how many decks remain. This will enable you to know whether you’re winning or losing and make decisions regarding bet size accordingly.

To calculate your true count, divide the running count by the remaining deck count. For instance, if your running count is five and there are only two decks left, your true count would be +5 / 2.

Continue this process until you have 10 decks, as this will give you a better sense of your true count, which in turn determines your advantage over the dealer during a game of blackjack.

One major drawback of counting cards in blackjack is having to perform numerous calculations before arriving at an accurate estimation, which requires both discipline and patience.

Attempts at accurate counting may end in more money being lost than would otherwise have been. There are, however, ways you can prevent this from happening.

1. Calculate Your “True Count” To be successful when playing multiple deck blackjack, the first thing to do is calculate your “true count”. This will enable you to identify whether you have an edge over the dealer in any given hand. While this method might take more work than using running counts alone, its extra informational benefits more than justify its added difficulty.