Blackjack is played with one or more decks of cards. But how many decks does an online blackjack game actually use? Discover how many decks are used in blackjack and what this means for the game.
What Is a Deck in Blackjack?
A standard deck consists of 52 cards: thirteen cards in each suit, divided into hearts, diamonds, clubs and spades. Each suit contains cards from ace to ten, plus a jack, queen and king.
In blackjack, the jack, queen and king all have a value of ten. An ace counts as one or eleven, depending on which value is more favourable for the hand. The remaining cards have their usual value.
How Many Decks Does Blackjack Use?
In physical casinos, six and eight decks are common, although variants with a different number of decks also exist. Live blackjack in an online casino also commonly uses six or eight decks. Single deck blackjack, which uses just one deck, is also available as a variant.
An online blackjack variant may specify that the game is played with one deck or multiple decks. The exact rules state how many decks are used in casino blackjack. This can vary depending on the provider and the variant.
Why Does Blackjack Use Multiple Decks?
A casino can use multiple decks to make the game more practical and to influence how cards are dealt and shuffled. Physical blackjack tables often use multiple decks at the same time. This allows the dealer to deal cards for longer before the entire set needs to be reshuffled.
The number of decks also affects the probability distribution of certain cards. With a single deck, the composition of the remaining cards changes relatively quickly as cards are dealt. With multiple decks, the effect of a single dealt card is smaller because more cards remain.
What Is Single Deck Blackjack?
Single deck blackjack is a variant that uses just one 52-card deck. This may sound simple, but it does not automatically mean that the player has an advantage.
The exact rules of the variant are still important. For example, the options for doubling down, splitting or resplitting can vary. The way the dealer plays, such as whether the dealer hits or stands on a soft 17, can also affect the odds.
In single deck blackjack, the cards are also reshuffled more frequently than in a game with multiple decks. Once a large part of the deck has been dealt, there are relatively few cards left.
How Many Decks in Blackjack Is Best?
For you as a player, single deck blackjack is theoretically more favourable than blackjack with multiple decks if all other rules are the same. This is because you can keep better track of the number of cards remaining in the deck. However, the difference is small. Other rules, such as the blackjack payout and the options for doubling down or splitting, can have a greater impact on the house edge.
The way the dealer must play also matters. For example, it can make a difference whether the dealer must stand on a soft 17 or hit. Together with the number of decks, these rules determine how favourable the game variant is.
Does the Number of Decks Affect Blackjack Strategy?
Yes. Basic strategy depends on the specific rules of the blackjack variant. The number of decks can be one of the factors involved.
A basic strategy chart for single deck blackjack therefore does not necessarily have to be exactly the same as a chart for blackjack with six or eight decks. The differences can occur in specific situations, such as when you should stand, hit, double down or split.
For most players, it is therefore advisable to use a basic strategy that matches the variant they are playing. When doing so, do not look only at the number of decks, but also at the other table rules.
The number of decks does not mean that you need to play every hand in a completely different way. Most basic decisions remain the same. However, certain borderline situations can change.
What Does Deck Penetration Mean in Blackjack?
Deck penetration in blackjack describes how many cards from the available decks are dealt before the cards are reshuffled.
Suppose a blackjack table uses six decks. If the dealer only deals a small portion of the cards before reshuffling, the deck penetration is low. If a larger portion of the shoe is used before the cards are reshuffled, the penetration is higher.
This concept is particularly relevant at physical blackjack tables and for players who count cards. The more cards that are dealt before the cards are reshuffled, the more information may be available about the composition of the remaining cards.
Are More Decks Better for the Player?
The number of decks on its own does not determine whether a blackjack variant is more favourable to the player. You need to consider all of the game rules to determine this.
For example, the rules for blackjack, doubling down, splitting and the dealer’s actions on a soft 17 can all affect the house edge. The blackjack payout is also important. A variant where blackjack pays 3:2, for example, has different game conditions from a variant where blackjack pays 6:5.
The number of decks is therefore only one part of the overall game setup. Two blackjack variants with a different number of decks can have other rules that ultimately have a greater impact on the odds.
Frequently Asked Questions
Where Can I See How Many Decks a Game Uses?
You can often find information about the number of decks used in the game rules. The rules are usually available through the information or settings icon when you open the game.
Can I Try Blackjack for Free?
Yes, most casinos allow you to play a demo version of a game without an account. This is only possible with games that do not take place live and are powered by an RNG.
Does the Number of Decks Affect the Odds in Blackjack?
The number of decks can affect the probability distribution and some decisions in basic strategy. However, the overall game conditions also depend on the other rules of the blackjack variant.
