How Many Cards Are Used in Blackjack?

Blackjack remains a popular casino game. But how many cards are used in blackjack? A single deck contains 52 cards, but common game formats provide more choice, using two decks, six decks, or even eight decks. 

Depending on the variant, a blackjack game can utilise anywhere from 52 to 416 cards. Deck counts, as you will discover, can influence basic-strategy decisions, game rules, and house edges. 

This guide breaks down all blackjack game components, so you know what to expect when playing single-deck or multi-deck games.

How Many Cards Are in a Blackjack Deck?

In blackjack, a standard deck contains 52 cards, and there are four suits (hearts, diamonds, clubs, and spades). 

Each suit will contain 13 ranks — Ace (counting as 1 or 11 depending on the hand), 2-10 picture cards, Jack, Queen, and King (all holding a value of 10).

Jokers are discarded and not used in standard blackjack, so single-deck blackjack uses 52 cards. Whereas in multiple-deck games, the blackjack deck size combines several 52-card decks.

How Many Decks Are Used in Blackjack?

There is no single universal blackjack deck size; however, there is scope for choice, and the games available are at the discretion of a casino. Our table illustrates the number of cards played in various guises of blackjack.

We’ve addressed a few cursory points relating to single and multiple-deck games played:

• Single-deck games use 52 cards, and they are celebrated for their simplicity.
• Double-deck games use 104 cards, and casinos brought them in as they sought a middle ground between single-deck and multi-deck games.
• In some double-deck variations, the dealer won’t check for blackjack until after players act, thereby increasing the house edge.
• Six-game decks use 312 cards.
• Eight-deck games contain 406 cards.
• Six and eight-deck games have become more common in casino blackjack, particularly in games that are dealt from a shoe, where there are longer dealing cycles.
• Other deck configurations can be dictated depending on the variant used.
• Blackjack table rules should always clearly state how many decks are being used.

Single-Deck vs Multi-Deck Difference

There are some fundamental underlying differences between single-deck blackjack and multi-deck blackjack, and this segment seeks to explore these distinctions.

Single-Deck Blackjack

Relying on a 52-card deck, games in single-deck blackjack tend to be fast-paced as more hands are played per hour.

With cards drawn from a smaller total pool, this can make it easier for players to track cards coming out of the pack and for card counting.

Players must be aware that some single-deck games use different rules from their multi-deck counterparts. However, single-deck blackjack is arguably easier to learn in terms of grasping basic strategy, which can help enhance performance.

Multi-Deck Blackjack

In multi-deck blackjack, there are two or more decks combined. Such blackjack games tend to offer less heat for bigger spreads. With a larger number of cards available, games tend to be slower, as more hands need to be dealt before a reshuffle.

Common configurations available at casinos include six and eight decks. With six and eight-deck games, the house edge can be boosted, giving casinos a bigger theoretical advantage.

With single-deck blackjack, meanwhile, it is worth addressing that fewer decks doesn’t automatically mean a better game for players. There are some nuances worth drawing your attention to:

• House edge will depend on specific rules, such as hitting or standing after Soft 17 (S17).
• A dealer who hits on S17 can add a slight house edge to games compared to standing on S17, and the payout might be 3:2.
• Players should check the S17 ruling before taking their place at a table.
• Other rules like early surrender can help players more and reduce the house edge.
• Some single-deck blackjack tables will offer a 6:5 payout, and some tables might restrict doubling.
• No two Double Deck games are the same. Some variations include no re-splitting of aces, meaning players may have to be more conservative with initial splits.

Why Do Blackjack Games Use Multiple Decks?

Casinos are leaning more into multiple-deck blackjack games, and we’ve uncovered a few reasons behind this shift:

• As a way of ensuring fairness and maintaining complexity, multiple-deck games have been deemed to be more favourable.
• Multiple decks allow more cards to be dealt before a shuffle, and therefore introducing more decks makes it tougher when it comes to card counting.
• Multiple decks can also change the probabilities of particular card combinations slightly. Crucially, the more decks can entail a higher house edge for casinos.
• Deck count is also one of the variables factored in when calculating basic blackjack strategy. The deck count alone doesn’t determine whether a game has favourable or unfavourable rules.

Are All Cards Used Before Blackjack Is Reshuffled?

While casinos use a standardised method for shuffling cards, not every card is dealt before reshuffling, and we’ve explained why:

• In physical shoe games, a cut card is commonly inserted before the end of the shoe. 
• Once the cut card is reached, the dealer will be ready to prepare for a reshuffle.
• The proportion of cards dealt before reshuffle is often referred to as deck penetration.
• Casinos are aware of penetration, and they often employ early or frequent shuffles to hinder card counting opportunities.
• Exact procedures vary by casino and alter the dynamics of a game.
• Some tables use automatic shuffling, making games more streamlined.
• Continuous shuffling machines can return previously used cards back into the card pool rather than waiting until an entire shoe has been dealt.

How Many Cards Are Used in Online Blackjack?

Online blackjack doesn’t have a single all-encompassing format. Rather, there are two ways to play — random number generator (RNG) games and live dealer tables:

RNG Blackjack

In computer-dealt blackjack, an RNG is deployed, and the rules page should clearly specify the number of decks used by the software.

With certified algorithms used to simulate card draws, this is designed to produce fairer outcomes. RNG games can feature six or eight decks, but single and double-deck variants exist too.

Live Dealer Blackjack

Players can join a live-streamed table, where a human dealer handles physical cards in a professional studio, and the visual aspect becomes a key part of the experience.

The game may use a multi-deck shoe; however, the exact deck count should be checked in the game information.

Does the Number of Decks Change Blackjack Strategy?

Ultimately, the number of decks can influence some basic-strategy recommendations, and the underlying probabilities will differ between single-deck, double-deck, and multi-deck games.

Blackjack strategy charts serve as a useful reference point for players, but they will usually specify the following:

• The number of decks for a game.
• Whether the dealer hits or stands on S17.
• Whether doubling or splitting is permitted.
• A strategy chart that has been created for an eight-deck game will have differing practical advice from other variants. Therefore, it should not be automatically assumed that tips provided here will apply to single-deck games.

Although strategy can help reduce mathematically poor decisions, it doesn’t necessarily guarantee successful outcomes or eliminate the house advantage.

Frequently Asked Questions About Blackjack Cards

How many cards are in single-deck blackjack?

52.

How many cards are in six-deck blackjack?

312.

How many cards are in eight-deck blackjack?

416.

Are jokers used in blackjack?

No, jokers are normally removed from the pack.

Does every blackjack table use eight decks?

No. Deck count depends on the game.

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