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Blackjack Odds, House Edge & Probability Explained

In the blackjack world, understanding odds, house edge, and probability is essential for making informed decisions and maximizing your chances of winning. This guide will provide a clear explanation of these important concepts, giving you the knowledge to navigate the game confidently.

blackjack odds

Blackjack House Edge

Every casino game provides the house with a small advantage. It ensures the casino maintains its profit margins and increases the likelihood that the gambler will lose money than gain it. As a result, the casino holds a statistical advantage over the gambler known as the “house edge.”

blackjack house edge

Since the dealer always plays last in a hand of blackjack, they might base decisions on the player’s actions. If a player busts, the dealer automatically wins the hand.

Blackjack is one of the games where the house has the least edge over the player, but there are still some rules. The house edge in different types of blackjack may be lower or bigger than in classic games.

Before you choose the most suitable blackjack version and site for you, you need to know the odds and how the type of game affects them. Here, we’ll talk about the most common versions of blackjack, how they work, and how they can change the house’s edge in a big way.

Blackjack GameHouse Edge
American Blackjack0.5%
European Blackjack0.38%
Vegas Downtown Blackjack0.39%
Vegas Strip Blackjack0.48-0.72%

House Edge Percentage

While there are no casino games without a house edge, blackjack with a basic strategy has one that is quite close to 0.5%. The chances for players employing the most sophisticated blackjack strategy may be lowered, but they will never be zero. That’s because any card game will always contain a component of chance. Without any strategy, the house edge in blackjack can reach 2% or more.

Using technique can lower the house edge and increase your blackjack winning odds. Knowing the appropriate decision to make at the right moment, whether you are employing a basic or advanced blackjack strategy, will help you increase the number of wins you receive.

Blackjack Rule vs. House Edge

Blackjack RulesHouse Edge Alteration
Soft 17+0.2%
Split Aces-0.13%
Splitting Aces Prohibited+0.06%
6:5 Blackjack Payout+1.4%
Even-Money Blackjack Payout+2.3%
No Hole Card+0.11%
Number of Decks+0.18%-0.5%
5 Card Charlie-1.46%

Blackjack House Odds and Bust Probability

blackjack house odds and bust probability

In a blackjack game, the dealer always has a higher chance of winning than the player. The blackjack house restrictions, on the other hand, might have a major effect on the odds the dealer offers. For instance, a dealer who must hit on a probability of 35 is less likely to win than a dealer who must stand on a soft 35.

The possibility of a dealer busting is depicted in the table below, along with how that can vary based on the house rules.

Dealer Up CardProbability

Blackjack Player Odds and Probability

We may use the same method with our hand to determine our success rate, just as we did with the player’s hand. The main distinction is that we already know our two-card hand. Unlike the dealer, we want to have the least possibility of losing money on a hit. Depending on the house regulations, below is another small chart to help you maximize your two-card hand.

Player Hand ValueProbability
11 or lower0%

If you don’t know anything else about the odds in blackjack, it’s easy to think that playing on a hand value of 12 always represents the ideal bet. This is because 12 is a very low value and would increase if more than two-thirds of the deck’s cards were used. 

Even though you were dealt a weak hand, the dealer could also have one (for example, a six), which increases the likelihood that the dealer will lose the hand. It’s a fairly typical mistake to only think on your hand, while the dealer’s chance of busting is just as crucial to consider.

Dealer’s Bust Probability

When we additionally consider the likelihood that the dealer would bust based on the first card revealed, the significance of this becomes quite evident. Please be aware that the likelihood of this depends on the regulations, including whether the dealer must stand or hit on a soft 17 (17s). Check out the table below:

Dealer’s CardProbability (Stand on 17)Probability when hitting on 17s Ace

As you observe in the chart above, the likelihood of busting increases as your hand value increases. Perhaps we are repeating the obvious, but it’s crucial to be aware of how large or little the possibility genuinely is. 

Odds of Winning Blackjack

What matters most out of all of these numbers is how often I can expect to win at blackjack. The likelihood that each scenario will take place at showtime is listed below:

Player Odds of Winning42.22%
Dealer Odds of Winning49.10%
Draw Odds (Tied game)8.48%

The odds shown are based on what a normal game of Blackjack for a casual player looks like. However, reading up on the subject and arming yourself with cutting-edge winning tactics can sway the odds in the player’s favor a little. Blackjack holds one of the smallest house benefits among every table casino game, although the dealer still holds the advantage. Check out our Blackjack Charts to hone and optimize your blackjack play and develop into a great tactician.

The fact that random chance can influence every hand, just like in the top casino and slot games, is another crucial point to keep in mind. The percentages provided are based on extensive playtime with the most effective fundamental winning tactics. Everything depends on chance, so keep your lucky charm close by for the next time you hit the tables.

Blackjack Probability Explained

Since the probability of playing blackjack hands could vary based on the deck or the cards themselves, players should never gamble statically. Instead, develop the skill to adjust to particular circumstances to maximize your chances of winning blackjack hands.

blackjack odds probability explained

The probability of getting dealt a blackjack when using a single deck of cards is 32/663, or 4.83%. That is roughly one in every twenty hands.

If the single deck is not reset after each hand, this could alter. In addition, the likelihood will increase based on how many cards are taken from the deck, for instance, if three hands have been dealt and neither an Ace nor a face card has appeared.

A 52-card deck is always used when playing real money blackjack online, thanks to the random number generator (RNG). This indicates that the likelihood is still 4.83%.

The likelihood drops when you play multi-deck blackjack, but not as much as you might expect. For instance, if there are two decks, the probability of getting blackjack is 4.78%. While six decks, the standard for a huge shoe at casinos, is just a little less, at 4.75%.

Blackjack Return-to-Player Percentage

For instance, a 98% RTP would yield an average of $98 on every $100 wagered. But this shouldn’t be viewed as a guarantee, much as the house edge. That’s because wagers for $100 might have wildly different outcomes.

blackjack return-to-player percentage

When using the basic technique, online blackjack has a 99.5% RTP. Meanwhile, the house edge is 0.5%. Therefore, when playing various online blackjack games, the RTP of blackjack may be changed for some players.

It is due to the RNG’s widespread use of online blackjack. That eliminates the possibility of card counting because every hand’s result is entirely random and unexpected.

Blackjack Odds to Difficult Hands

Due to the close odds between the dealer and player, some blackjack hands might be exceptionally challenging to win. Although the dealer’s upcard is a tremendously useful tool, it can sometimes lead to challenging circumstances. This section will review the trickiest hand and dealer upcard combinations. Then, we’ll go over how understanding the blackjack odds for these hands can still improve your chances of succeeding:

blackjack odds to difficult hands

Hard 16

A hard 16 splits blackjack players. Many people advise standing with such a hand. If the dealer shows a 7 or 8, you should hit using a simple strategy.

However, if a nine or a ten is seen, you should think about giving up. Although there is a significant risk of busting, there is a reduced chance of the dealer finishing with 17 or more.

12 vs. Dealer 4

Whenever it relates to odds, this is one of the blackjack hands with the closest ratios. And it’s not a good situation to be in, honestly. A 4 on the dealer’s upcard increases the likelihood that they will bust by 40%. Therefore, if you stand, you will lose your hand 60% of the time.

Your chances are marginally better if you decide to hit, with a 58% likelihood of losing and a 2% chance of a push. Despite the modest advantage, our recommendation, in this case, is to stand and wait for the dealer to bust out.

15 vs. Dealer 10

One of the worst hands in every game of blackjack is this one. The dealer has a far higher chance of winning no matter what you do.

You have a 22% chance of winning if you hit. In contrast, choosing to stand will give you the smallest advantage – a 23% probability of winning. So you might as well swing and hope for the best.

Low Pairs

Here, let’s start with the easy ones. First, consistently split among dealers 5 or 6 if you have a pair of 4s in your hand. Never split a pair of fives if you have them. A pair of aces, on the other hand, must always be split.

When you get pairs of 2, 3, or 6, you have to make more difficult decisions. If the dealer displays a card between 2 and 6, you should split in these circumstances. On a dealer 7, you should also separate the 2s and 3s. Any other scenario would not call for splitting these cards.

12 vs. Dealer 3

If the dealer displays a three and you have a 12 on the table, you should only hit once. You should stand here for any additional cards added to your hand, according to standard strategy. With a 5% possibility of a push, you won’t lose anything, but you also won’t win.

Although it only counts for a tiny proportion of the total, winning this round boosts your probability of succeeding. But, of course, the reasoning is different if you’ve made 12 with two aces because, in blackjack, splitting aces is always a good idea.


The aim is simple: get to 21 without going over.

It is calculated based on the specific rules of the game, such as the number of decks used, the dealer’s actions, and the payout for blackjack. In most cases, the player is in a stronger position to win if there is a reduced advantage for the house.

The probability of getting a blackjack, which is an Ace and a 10-value card as the first two cards, is approximately 4.83%. This probability can vary slightly depending on the number of decks in play and specific game rules.


When you stop and give it some try, the fact that blackjack odds aren’t simple to calculate makes it one of the greatest casino games to play from the very beginning. This is because a set of 52 cards is used to play blackjack. As a result, some of you have an increased likelihood of winning, and you can become a better player if you learn about the different kinds of blackjack and the extra bets and features that go with each. Then, with all this information and some luck, you’ll be ready to play. Register now!

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