Stack the Odds in Your Favor: How the Number of Decks Influences Blackjack Win Rates

Blackjack is one of the classic and most commonly played games in any casino, whether it is an online casino or a land-based casino.

Blackjack is one of the classic and most commonly played games in any casino, whether it is an online casino or a land-based casino. Several gameplay changes can have a big influence on the return to player (RTP) percentage and one of the easiest to understand is the number of decks used.

The RTP describes how much a player may anticipate losing on average when playing a certain casino game. All casino games have a profit margin, which is how the casino makes money. The RTP is stated as a percentage and may differ considerably.

Scroll down and find out how the number of decks affects the house edge in blackjack.

How Does the Number of Decks Influence the House Edge?

More decks have a huge influence, probably much more than many players realize. We can see the impact of adding additional decks below if we consider somewhat typical, but still comparatively permissive, rules in all of the places that matter.

As you might be aware, the house edge of each casino game indicates your chances of winning. The lesser the casino’s advantage, the better your chances of getting good outcomes.

The number of decks used in the card game has a direct impact on the advantage that the casino holds over the players, with the single-deck variant offering the lowest house edge rate.

This table displays the house edge, which is the casino’s profit margin, instead of the RTP. While a high RTP is important, everyone who plays blackjack wants the house edge to be as small as possible.

The Effect of the Number of Decks on the House Edge in Blackjack
Number of Decks House Edge (%)

While this may not appear to be a significant concern, even low percentage variations pile up over time. Undoubtedly, the largest jump is from a single deck to a double deck game, when the house edge nearly quadruples. Blackjack is a game in which players can play hundreds or even thousands of hands, and even with small bets, such variations can mount up.

Optimal Blackjack Gameplay

In the game of blackjack, thorough statistical analysis and extensive knowledge of the game have resulted in the development of the idea of optimal play. This implies that, depending on the player’s and dealer’s cards, there is always a single line of action that produces the best long-term advantages for the player.

In this game, the RTP is predicated on a player playing optimally, and any deviation from this will reduce the RTP rate, resulting in higher losses for the player and larger profits for the house.

In general, most online casinos provide blackjack with a house edge of 0.4% to 1.5%, while it can be somewhat lower under the most liberal rules or significantly higher with certain less generous casinos that stack all the rules in their favor. The number of decks used has a significant influence on the house edge, while other factors involve the following:

FactorsEffectHouse EdgePlayer’s Edge
Player Doubles on Any First CardsIncreases the RTP
Split AcesIncreases the RTP
Blackjack pays 6/5Reduces the RTP
Player Doubles after a SplitIncreases the RTP
Dealer Stands or Hits on Soft 17Reduces the RTP

Why Do Casinos Add the Number of Decks in Blackjack?

Adding only one more deck to a game of blackjack boosts the house edge significantly. Even if it is sufficient motivation to add more decks to the game, other reasons encourage casinos to raise the deck count. Regardless of the motives, the ultimate result is the same.

One of the casinos’ aims is to keep advantaged players from employing card counting to obtain an edge against the house. Casinos began adding extra decks to the game as the card-counting mechanism became immensely popular. Keeping a running count becomes more difficult when there are a lot of cards in the shoe to examine while playing blackjack.

The fewer decks used for the game, the more accurate the count will be, providing participants with a better understanding of what it takes to manage their bets. At this point, when more decks are used in the game, card counters must focus to obtain greater counts, which might result in less accurate findings.

Single-Deck Blackjack Is the Best Way to Play

Why is single-deck blackjack the most popular version at Singapore’s trusted online casino sites? We are going for a blackjack version that uses a single deck to play with the best potential player edge.

Card counters and players employing a basic blackjack strategy can greatly benefit from playing with only one deck.

Knowing the best move for each hand ensures that blackjack players have a greater edge. When you combine it with only using one deck in the game, your odds of winning will jump.

If you are proficient in the skill of card counting, the single-deck variant is ideal for you. Because there will only be four aces in the game, you are going to have an easier time keeping track of them in the deck. In broad terms, dealing with fewer details allows for faster card counting and better blackjack strategy.

Card counters were introduced to blackjack lovers when playing single-deck or two-deck variants of the card game. Naturally, they would have no problem employing their counting abilities in games with only a handful of cards at most. Because there were so few cards to count, keeping a running count was considerably easier.

However, it makes no difference how many decks you play. Remember to be savvy when playing this card game by reading our separate article about “common blackjack errors to stay away from.”


When selecting a blackjack version to play for real money, there are certain guidelines to keep in mind for playing a good game. The number of decks used is one of the most significant aspects of the game of 21 to take into account.

This will have a direct impact on the possible return you may receive and will allow you to select the best version of blackjack to play.

It doesn’t matter how many decks you will play; the best way to improve your gameplay is to choose trusted casino online Singapore sites that provide the best blackjack games.

Frequently Asked Questions (FAQs)

Players are seeking answers to certain search terms. Some of the most commonly asked questions concerning this issue will be addressed in the FAQ section. This part of the website will provide you with straightforward and clear answers to your questions.

Why is single-deck better in blackjack?

The house edge in single-deck blackjack is smaller than in multi-deck versions. Blackjacks are more common, and 10-value cards are dealt on top of double-downs in a greater percentage of single-deck hands.

How do multiple decks of cards work in blackjack?

There are just more 10-value cards to get in multi-deck blackjack, which may contain up to 8 decks. As the table indicates, with a single deck, you may even double down on an 8 if the dealer presents a 5 or 6. With a low-up card, the dealer will have a more difficult time coming up with a winning total.

Do multi-decks have a better payout?

No, generally speaking, when blackjack is played with more decks, it does not mean that payouts will be higher. The opposite is often true: the more decks are used, the less a player’s chance of winning.

Is card counting possible in online blackjack?

No, since most online casinos utilize algorithms that shuffle the cards each time a new hand is given, making it a little more difficult. Several applications will count the cards for you, but they are normally not allowed to be used.

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