What are Blackjack Odds and how are calculated ?

What are Blackjack Odds and how are calculated ?

Published Date · Nov. 3, 2021 · Last Updated · Feb. 4, 2025 ·Read Time · 5 mins

Odds in Blackjack

Blackjack is one of the most popular casino games, partly because it offers some of the best odds of winning compared to other casino games. Unlike games of pure chance, such as roulette or slots, blackjack involves skill and strategy, allowing players to influence the outcome.

To make informed decisions, it’s essential to understand how they are calculated and how they affect your chances of winning. This article will break down the different types of odds in blackjack, including your probability of winning, busting, and drawing specific hands, so you can play smarter and improve your results.

What Are the Odds of Winning Blackjack?

In blackjack, there are three possible outcomes for each hand:

  • Winning the hand (around 42% of the time)
  • Losing the hand (around 49% of the time)
  • Tying with the dealer (around 8% of the time)

These percentages are based on standard blackjack rules, but the exact casino blackjack odds can change depending on factors such as the number of decks in play and specific table rules.

How Blackjack Odds Compare to Other Casino Games

Compared to many other casino games, blackjack offers better winning odds:

  • Blackjack – Player wins around 42% of hands
  • Roulette (Single Zero European) – Chance of winning a single-number bet is 2.7%
  • Slot Machines – Varies, but most have a house edge of 5% to 10%

This is why many players choose blackjack over other games—it offers one of the best chances of winning in the casino.

How Are Blackjack Odds Calculated?

Odds of Drawing Certain Cards

Since blackjack is played with a 52-card deck (or multiple decks), each card has a known probability of being drawn. At the start of the game:

  • The odds of drawing an Ace are 4 in 52 (or 7.69%)
  • The odds of drawing a 10-value card (10, J, Q, or K) are 16 in 52 (or 30.77%)

As cards are played, these probabilities change, which is why some advanced players use card counting to track what remains in the deck.

Odds of Busting (Going Over 21)

One of the most critical aspects of blackjack is knowing the chances of busting if you decide to hit:

Hand Total
Chance of Busting if You Hit

11 or lower

0% (you can’t bust)

12

31%

13

39%

14

56%

15

58%

16

62%

17

69%

18

77%

19

85%

20

92%

The higher your total, the greater the risk of busting. This is why many blackjack strategies recommend standing on 16 or higher, especially if the dealer has a weak upcard (such as 4, 5, or 6).

Odds of the Dealer Winning

The dealer must follow strict rules—typically, they must hit on 16 or less and stand on 17 or higher. This impacts the dealer’s odds of winning:

  • The dealer busts around 28% of the time.
  • If the dealer shows a weak card (like a 5 or 6), their chances of busting increase.
  • If the dealer has an Ace, their chance of getting blackjack is 30.8%.

Since the dealer does not make decisions, their actions are predictable, which is why blackjack strategy is built around countering the dealer’s likely outcomes.

Odds of Getting Blackjack (A Natural 21)

A natural blackjack (an Ace + a 10-value card) is the best possible starting hand. The probability of getting a blackjack is:

  • Single-deck game: 4.83% per hand
  • Six-deck game: 4.75% per hand
  • Eight-deck game: 4.75% per hand

If the casino offers a 3:2 payout for blackjack, this hand significantly improves your long-term winnings. However, beware of 6:5 blackjack games, where the lower payout increases the house edge.

How to Use Blackjack Odds to Make Better Decisions

1. Know When to Hit or Stand

  • If your hand is 12-16, hit when the dealer has 7-Ace but stand if the dealer has 2-6.
  • If you have 17 or higher, always stand (unless using an advanced strategy).

2. Take Advantage of Splitting

  • Always split Aces and 8s (this improves your winning chances).
  • Never split 5s or 10s (keeping them together gives you a stronger hand).

3. Understand Double Down Odds

  • Doubling down is most effective when your hand is 10 or 11, as you have a high probability of getting a winning hand.
  • The odds of drawing a 10-value card are about 30.8%, making it a favorable play in many situations.

Final Advice: Use Blackjack Odds to Your Advantage

Understanding blackjack odds gives you a significant advantage over casual players. By knowing your chances of winning, odds of busting, and dealer probabilities, you can make smarter decisions that improve your results over time.

Key Takeaways:

✔ The odds of winning blackjack are around 42% per hand.
✔ The dealer busts about 28% of the time.
✔ Your chances of busting increase as your total gets higher.
✔ A blackjack occurs about 4.75% of the time.
✔ Using basic strategy helps you make the best mathematical decisions in every hand.

Now that you understand blackjack odds, you can approach the game with confidence, make smarter bets, and improve your overall success at the table. Good luck! 🍀♠️

Author

Matthew Wojciow

Content Writer