Card counting is a system for tracking the probability of being dealt favourable cards during the game. The idea isnβt to count every single card so you know exactly when you have an edge over the casino. The goal is to know when the remaining shoe is rich or poor in high cards.
How to Count Cards in Blackjack
To take your game against the dealer in the casino up a level, you need to learn card counting in Blackjack. Card counting is a simple skill, but itβs not entirely easy to master. Let us guide you. Weβll take you step by step through the perfect guide, strategies, principles and the history of card counting. To get this technique down, youβll need to invest some time and a lot of patience. Remember: card counting can be learned.
The most important information about card counting in Blackjack
- How should I understand card counting in Blackjack
- Why not count cards?
- Why should you consider card counting?
- How does card counting work in Blackjack?
- Card counting in online Blackjack
- Basic card counting strategy
- Summary: How to count cards for beginners in 4 steps
- Casinos where you can play Blackjack for real money
- Which strategy is the best?
- Is card counting illegal?
- The 5 greatest card counters in history
- Advanced card counting strategies
- Blackjack hub β learn everything about Blackjack:
- FAQ β Most common questions about card counting in Blackjack
How should I understand card counting in Blackjack
Card counting is one of the techniques you use when you track the remaining number of high and low cards in the dealerβs shoe. With successful card counting, you can increase your stake when you can see the odds are currently in your favour, boosting your percentage chance of winning a bigger bet. Just remember that card counting isnβt there to teach you how to win at blackjack consistently, or even how to cheat at blackjack. Think of card counting as a set of skills for regular play. It allows you to estimate the value of the cards left in the shoe.
Why not count cards?
There are no laws that treat card counting as a criminal offenceβprovided youβre doing it in your head and youβre not using a card-counting device or a mobile app. Despite that, itβs still considered cheating. If you try to count cards in a casino, we strongly recommend being cautious. Casinos keep an eye on players who count cards and use every available technology to do so. You may be asked to leave the table, or you could even be banned from the casino. Be awareβyour behaviour will be closely monitored throughout your play.
Why should you consider card counting?
The main reason? Winning. If youβre good at counting, follow all the steps correctly, and stick to strategy principles, youβll eventually be rewarded with a sweet win. Learning to count cards in blackjack can help you win big sums. Blackjack is a worldwide phenomenon among casino games because, as well as being entertaining, it also gives you a decent chance of landing a winβespecially when you know what youβre doing. Then the game becomes even better, as you can swing the odds of winning in your favour, giving you an even greater chance of success. You can boost your chances even further by using a Blackjack bonus.
Track your bankroll
Even though itβs very important to pay close attention to the cards that have been dealt, itβs just as important to always keep in mind how much money you have to play with. You donβt want to start making sudden, drastic moves that leave you broke.
How does card counting work in Blackjack?
If you want to count cards correctlyβwhether in an online game or playing Blackjack in a casinoβall you need to do is keep a running record based on the face value of all revealed cards. Weβll explain how in the following steps. Learn to count cards using these steps.
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Find out how many decks are being used
The basics start with finding out how many decks the dealer is using. With this strategy, the fewer decks, the better you can estimateβbased on the countβthe probability of a high or low card the dealer will turn over.
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Assign values to the cards
Start by assigning the cards a value of +1 (cards 2β6), 0 (cards 7β9) and -1 (cards 10βA).
Card value Assigned value 2, 3, 4, 5, 6 +1 7, 8, 9 0 10, J, Q, K, A -1 -
Keep a count
Keep a running count with every card the dealer draws from the shoe, using the values listed above.
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Track all cards
Assuming you keep an accurate count as the cards are dealt, youβll be able to track the running value of the remaining cards in the shoe.
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Adjust your bets based on the count
If youβve been counting carefully, you can better picture the approximate value of the dealerβs next card. The higher the number youβve counted, the higher the probability that the next card will be a high one. Conversely, if your count is negative, the probability of a low card being drawn increases.
So how exactly does it give you an edge over the casino? If you play Blackjack perfectly, the house edge sits at around 0.5%. If you play perfectly and also count cards, youβre playing with a 1% advantage over the casino. So this technique really is worth itβadmit it.
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Card counting in online Blackjack
You can use card counting in online Blackjack too. Although most online casinos use software that shuffles the cards every time a new hand is dealt, which makes this type of counting more difficult. There are several programs you can use that will count the cards for you. However, using them is generally prohibited. The advantage, though, is that you can count cards from home without risking the casino catching you, as can happen if you try to count cards in a land-based casino. You shouldnβt sit down at a Blackjack table until youβve first learned card counting through practice. A great way to practise counting is to use one of the free online Blackjack games. In free games, you can improve your skills without risking losing your money. If you decide to play for real money online, keep in mind that some sites use software that shuffles the cards almost every time a new batch of cards is dealt. This makes it increasingly difficult to count cards and gain an edge over the casino.

Basic card counting strategy
The most basic strategy for beginners is called the Hi-Lo Blackjack strategy. In this strategy, high cards (10-A) are assigned a specific value of -1. Low cards (2-6) are assigned a value of +1. The remaining cards (7-9) are counted as 0. This strategy is simple for a beginner and easy to use, and it allows you to start counting cards when playing online or in a land-based casino. When the dealer deals a card, note its assigned value in your head. If the card is, for example, a queen, you count it as -1. If the next card dealt is a two, its assigned value is +1. You continuously add and subtract the numbers according to their value. In this case, we have a running total that equals 0. The idea is that you do this continuously for each new card dealt, without breaking your count, until the shoe is shuffled again. The count is considered the so-called running count. And thatβs it. The calculations arenβt difficult, but you do need to stay focused and avoid mistakes.
Summary: How to count cards for beginners in 4 steps
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Assign each card a value (+1, 0, -1).
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Watch the cards and remember their values.
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Add up the card values to determine the value of the cards in the shoeβi.e. the running count.
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Bet according to the count (increase your stake if the count is negative, decrease your stake if itβs positive).
Be discreet
Card counting may not be illegal if you do it in your head, but itβs still frowned upon in many land-based casinos. If staff catch you in the act, you may be asked to leave the tableβor even be thrown out of the casino altogether.
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Which strategy is the best?
The simplest strategy is Hi-Lo. To begin with, itβs best to start with that one. After a while of playing, youβll see how youβre getting on. As your skills improve with practice, you can decide to move on from basic counting to an alternative Blackjack strategy. Of course, you need to be 100% confident youβve mastered the game itself before you even start card counting.
Is card counting illegal?
At Bonus-menu.co.uk, we try to make sure youβre always as well informed as possible when it comes to casino games. There are laws you need to consider before you start card counting.
For example, the laws of the state of Nevada (Las Vegas) prohibit card counting using electronic or mechanical aids, such as smartphone apps. If youβre caught counting, youβll be arrested. Using your own mental arithmetic skills to track the cards isnβt illegal. Although the legal position on card counting is perfectly clear, using your head to count cards is still not welcomed in casinos.
Even though the casino and its operator canβt prosecute players who count cards while playing Blackjack, they can make things very unpleasant for you if youβre caught. Some law firms in the USA have dedicated legal teams and defence attorneys who deal with arrests in Las Vegas. Because casino operators are well aware of the practice of card counting, they take measures to stop you. Youβll find surveillance cameras wherever you look up. Dealers are often rotated when a table is considered too profitable. Sometimes the pit boss will instruct the dealer to do an extra shuffle as soon as the round is over. Online blackjack doesnβt have the same issue, but some software generates random shuffles to prevent this practice. If you decide to enter a casino, itβs important to be responsible and respect the rules on their premises.
The 5 greatest card counters in history
The 5 greatest card counters in Blackjack history definitely include the MIT team, Jeff Ma, Peter Griffin, Ken Uston and Erika SchΓΆnberg. The MIT Blackjack Team was formed in 1979 and operated for more than two decades. Its original members, as well as those who joined later, were university students. The biggest single win was never specified, but the cumulative total winnings amounted to millions of dollars. An interesting fact about the MIT team is that several team members, including Bill Kaplan, appeared in the 2008 film 21, which is based on the story of this Blackjack-playing team.
Play Blackjack in a land-based casino
Online card counting is extremely difficult due to the use of RNG, which shuffles the deck randomly after every hand. Youβll be far more successful playing in a land-based casino with a real dealer and a physical deck of cards.
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Advanced card counting strategies
Once youβve mastered the basics of card counting using the Hi-Lo technique, youβve probably stopped counting on your fingers. If you want to move on to more complex methods, there are several options to choose from.

Omega II
The Omega II technique is a balanced system, with 0 as the baseline. It was developed by Bryce Carlson, who wrote an entire book on card counting in 1992. Itβs more sophisticated than the classic values of +1, 0 and -1.
| Card value | Assigned value (count) |
| 2, 3, 7 | 1 |
| 4, 5, 6 | 2 |
| 9 | -1 |
| 10, J, Q, K | -2 |
| 8, A | 0 |
A positive count indicates that there are more low cards left in the shoe. A negative count means there are still plenty of high cards remaining.
Wong Halves
This system is named after its creator, Stanford Wong. Itβs considered an advanced strategy because of the assigned values, some of which are fractions.
| Card value | Assigned value (count) |
| 3, 4, 6 | 1 |
| 2, 7 | 0,5 |
| 5 | 1,5 |
| 8 | 0 |
| 9 | -0,5 |
| 10, J, Q, K, A | -1 |
Wong Halves is considered a balanced system, which means that when the shoe has been fully dealt, your total should be 0. You can simplify the strategy by doubling all values to avoid using fractions altogether.
Team play
Some card counting approaches require a team effort. The advantage is that you can count multiple shoes across several tables at the same time. The team uses signals to communicate with each other while avoiding detection. This way, the big bettors can be told when to join the game and whether to place large bets or not.
Multiple Decks
This strategy was devised by a team of MIT students and graduates who won millions of dollars over the years in various casinos. Once their exploits were uncovered, their story became a bestseller. In 2008, their story was adapted into a Hollywood film called 21.
Counting Multiple Decks β what if the casino uses multiple decks?
One way casinos try to combat card counting is by using multiple decks at a single table. In theory, this makes it harder for players who count cards to track the running count. If you come across a blackjack dealer using multiple decks, you can still use the Hi-Lo strategy. All you need to do is divide the running count by the number of decks remaining. This gives you whatβs known as the true count. Your true count, rather than the running count, determines your edge when multiple decks are in play. You need to keep an accurate running count to work out the true value. For example, if your running count is 5 and there are 2 decks remaining, then the true count will be 2,5 (because 5 divided by 2 is 2,5).

Try one of the strategies
There are many different strategies you can try, several of which are mentioned right here on our site. Practise a few to find out which suits you best. Then you can test it when playing Blackjack.
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FAQ β Most common questions about card counting in Blackjack
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1οΈβ£ How does card counting work in Blackjack?
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2οΈβ£ Is card counting in Blackjack illegal?
No. Card counting isnβt illegal as long as you donβt use mechanical or electronic devices in a land-based casino. When you play online, they canβt watch you. Card counting is a skillβfirst and foremost, itβs a playing strategy.
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3οΈβ£ Is it hard to count cards?
The technique itself isnβt demanding. But it does take practice. When it comes to card counting, thereβs a learning curve. Even though itβs manageable, it isnβt always easy. You just need to understand Blackjack as a game and understand the counting system required every time you play.
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4οΈβ£ How do you improve at card counting?
Itβs a good idea to start with the basic Hi-Lo strategy. Practise online first or with friends before you try it in a real casino. Starting in a real casino isnβt a good idea at allβyouβll risk getting caught within the first few sessions while youβre still learning.
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5οΈβ£ How long does it take to learn card counting?
The time it takes you to learn card counting is completely subjective. Generally speaking, you definitely wonβt go from zero to pro in a few days. The way to estimate how long it might take is to first consider how quick and efficient you are with arithmetic.
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6οΈβ£ Can you count cards in other games?
Yes, you can count cards in other games too. Baccarat is a game that can be influenced by card counting, although implementing the strategy requires a certain level of skill. The rarely mentioned 3-card brag can also be played with card counting, because the deck is only shuffled during specific game scenarios.
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7οΈβ£ Whatβs the best app for counting cards in Blackjack?
Many apps claim to be the best for counting cards in Blackjack, but as you probably already suspect, that doesnβt necessarily have to be true. The best solution is to learn the strategy through practice. Useful tools will help you improve your skills and test your knowledge.
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8οΈβ£ Do Blackjack dealers count cards?
Possibly. For dealers in online live casinos or land-based casinos, thereβs no real benefit to counting the cards they deal. Technically, they could try to influence player behaviour, but there are no advantages for dealers in doing so. Whatβs more, live casinos today have to follow such strict rules that the consequences would be far too severe.
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9οΈβ£ Can I learn how to win at Blackjack without counting cards?
Yes, of course. You could win by luck just by knowing the basic rules of how to play. You donβt need to be able to count cards to know how to play Blackjack and win. Card counting isnβt a reliable method that guarantees a win. Playing with Blackjack strategies is another way to increase your overall chances of winning at the game.

