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Understanding the Basics of Casino Game Odds

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Here, I will talk about understanding the basics of casino game odds

All online casino games are based on odds, and you need to understand the fundamental principles behind them if you hope to become a great casino player.

Whether you’re interested in blackjack or roulette, our guide gives you a look at the basics of casino game odds that will familiarise you with how odds shape gameplay, allowing you to make better decisions and potentially increase your chances of success.

Casino Game Odds: Decimal vs Fractional Odds

Casino Game Odds: Decimal vs Fractional Odds

There are several ways to present odds in casino games, but decimal or fractional formats are the two most popular ones. Decimal odds indicate the potential return you could get combined with your original stake, whereas fractional odds show the potential profit you could get relative to your bet.

The formats are popular in different regions. Decimal odds are the standard in Europe and possibly the easiest format to understand. So, if you have odds of 5.00 in a casino game, that means you stand to win 5.00 in addition to your stake if the bet is successful.

On the other hand, fractional odds are more common in the UK, giving you a look at the profit you stand to make, relative to the bet you place. If you have odds of 3/2, this implies that you stand to make a profit of three units for every two that you wager.

Both the decimal and fractional formats bring their advantages to the table. Decimal odds give you more clarity about your potential returns, while fractional odds can be easier for some players to intuitively interpret, especially when they’re used for gambling events like horse racing.

As a player, you should understand how both of them work, making sure you’re as informed as can be, before making any betting decisions. This ensures you’re fully aware of all the risks and potential rewards that can come with these wagers.

House Edge

You will most likely have read the words house edge being used when describing odds in online casino games. It refers to the representation of the statistical advantage that casinos hold over you in all the games they offer. Think of it as the built-in profit margin for the online casino, making sure that over time, the house will generate profit regardless of individual wins or losses.

The house edge will vary from one game to another and can even vary depending on different bets within the same game. This is especially true of games like blackjack and baccarat, where if you put the right strategies to good use, you can get relatively low house edges of under 1%. But when it comes to more rigid games like roulette or slot machines, where the outcomes are mainly based on luck, the house edge ends up being higher.

The better you understand online casino house edge, the more you can push for potential wins in your online casino games. The bottom line is that a lower house edge gives you better odds, while a higher one makes it harder for you to land wins. You can play games with lower house edges and put together optimal betting strategies to keep that level as low as possible, for an even better online gambling experience.

House edge can ultimately be a deciding factor when you’re choosing the right online casino games for you. So, bear it in mind if you’re looking to find out the latest game reviews and sift through a game’s attributes and statistics.



Player, Banker and Tie are the three main bets in Baccarat, and the odds for the game primarily revolve around them. 

The Banker bet tends to have the best odds, with a house edge that floats around the 1.06% mark, making it the most favourable for you to wager on. Close behind, you get the Player bet which has a slightly higher average house edge of 1.24%. But the Tie bet is set apart with its significantly higher odds, with a house edge that tends to go way over the 14% value. 

By understanding these odds, you can build a better strategy in the game, knowing which bets are more lucrative and capitalising on favourable odds to maximise your chances of success.


In blackjack, the house edge varies, depending on factors such as the number of decks in play, as well as specific rules related to the variation you’re playing. Regardless of these many different factors, understanding the odds is essential since strategic play can lead to a lower house edge.

When using optimal strategies, the house edge can go down to as low as 0.5%, even lower in some cases. But if you don’t consider these strategies, it will be significantly higher. This is because blackjack is a game where your decisions can directly influence your odds. Knowing when best to hit, stand, double down or split will go a long way in boosting your luck, helping you to potentially tilt the odds in your favour.


Odds in craps can vary a lot, based on the type of bet you place. The Pass Line bet is the simplest and most common of the lot, with a relatively low 1.41% house edge, making it incredibly popular among players. If you go for proposition bets like Any 7 or Any Craps, you’ll be looking at much higher house edges, which go above and beyond 10%. This makes them way riskier.

To fully understand odds in craps, you need to have a good idea of the probability of landing different outcomes based on your dice roll. The more familiar you are with these elements, the more informed the decisions you can make when playing this fast-paced game.



Each different roulette bet comes with its own set of odds. These include straight bets, as well as those based on colours or number groups. Bets like Red/Black, High/Low or Odd/Even give you near 50/50 odds, and the house edge can get higher depending on the number of green zeros on the table. In European Roulette, you have a single green zero, but in the American variant, you get two.

Straight bets are ultimately more rewarding, but they also carry much higher risk. Always consider the risk/reward balance when putting together your roulette bets, combining both safe bets with low payouts, as well as riskier wagers with more rewarding potential.

Short Term Play

If you opt for short-term play at your favourite online casino, you’ll need to count on luck a lot more than you would when dealing with long-term statistical probabilities. This is mainly because of the very nature of the random number generators that are used in online casino games. They make sure each result isn’t affected by previous results, which makes them pretty unpredictable.

During these brief sessions, your win or loss streaks are influenced by volatility instead of long-term probabilities. A game’s volatility will positively or negatively impact your bankroll size too. There is no telling which way things will go, and short-term play can lead to both significant wins and consecutive losses.

That’s why, in this scenario, you should focus on the entertainment factor in games, rather than worrying too much about the potential profits you stand to gain. Bankroll management can be crucial here too. You should set clear betting limits and stick to them to avoid excessive losses that can come with impulse decisions, based on emotions you feel in the heat of the moment. 

Short-term play ultimately doesn’t give you the space for strategic considerations that you’d get in long-term play. But even so, you can still have an enjoyable and potentially rewarding experience, just as long as you approach games with caution and make use of responsible gambling practices. Keep in mind that online casino games are there to entertain you and so you should always enjoy them responsibly.

The Grind

Contrary to short-term play, long-term play, or “the grind”, refers to slowly but surely accumulating wins over a longer period by playing consistently and managing your bankroll efficiently. Rather than relying on luck, the grind focuses on strategic gameplay and has you exploiting favourable odds to gradually generate more profit.

When you’re engaging in the grind, you’ll want to focus on casino games with the lowest house edge possible, making sure you use the best betting strategies possible to enhance your chances of success. It also helps to use bonuses, promotions and loyalty programs that can boost your profitability further.

You’ll need quite a lot of patience and resilience to get through the grind, as it asks you to withstand the inevitable losses that come your way, all while staying focused on the long-term perspective. This is ultimately a marathon, not a sprint, so your goal here is to build steady and sustainable profit over time, irrespective of the casino game odds. 

Sure, the grind may not come with the adrenaline rush that big wins bring in short-term play, but they do give you a more methodical and reliable path to build long-term profitability.


About the Author:

mikkelsen holm
Writer at SecureBlitz

Mikkelsen Holm is an M.Sc. Cybersecurity graduate with over six years of experience in writing cybersecurity news, reviews, and tutorials. He is passionate about helping individuals and organizations protect their digital assets, and is a regular contributor to various cybersecurity publications. He is an advocate for the adoption of best practices in the field of cybersecurity and has a deep understanding of the industry.


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