King Casino Background

What Is The House Edge In Roulette?

Roulette House Edge 

Many Roulette players have one question: What is the house edge in Roulette? While new Roulette players can often overlook the house edge, more experienced Roulette players might have a better understanding of the house edge. The house edge can be a good indication of how much money the UK casino stands to potentially make from a certain casino game over time. 

Remember, all casinos are businesses, and running a business wouldn’t make sense if it didn’t make a profit. Hence, all live casinos have a module in place designed to ensure they profit in the long run. That’s where the saying ‘The house always wins’ comes from, and while there are exceptions, most players lose to the house in the long run. The exceptions may just win the jackpot!

Log in or join King Casino online and try out our wide range of casino games, including all the popular variations of Roulette! But first, we recommend you read this article to learn more about the house edge in Roulette. 

How Do You Calculate House Edge in Roulette? 

Before we tell you how to calculate the house edge in Roulette, let’s talk about what the house edge is. Simply put, it’s a casino’s advantage over all the players. The house edge reflects the difference between the odds of potentially winning and the casino’s payout for bets in specific games. 

Table games like Roulette can offer a better house edge to players, as the house has a lower edge on these Roulette table games. Now that you have an answer to what the house edge is in Roulette let’s talk about how you can calculate it. 

To do this, you need to do some maths and work out the Expectation of the bet. Expectation is a Roulette term that refers to how much you could win or lose in the long run. Here’s the formula to work out the expectation:

Expectation = (Loss x Probability) + (Win x Probability)

This means to work out the house edge and Expectation of a bet, you need to know 2 things – the probability of losing and the amount you lose – and the probability of winning and the amount you win. Let’s look at an example to understand this.


In European Roulette, 37 possible outcomes exist. 18 black numbers will lead to a win, and 18 red numbers will lead to a loss. So, the probability of winning is 18/37, whereas the probability of losing is 19/37 (because of the green 0). Now, let’s refer back to our equation. 

Expectation = (Loss x Probability) + (Win x Probability)

Expectation = (-100 x 19/37) = (100 x 18/37)

Expectation – (-51.35) + (48.65)

Expectation = -2.70

This means that, on average, £100 could get you a loss of £2.70, and 2.70% is also the house edge in European Roulette. 

French Roulette House Edge 

French Roulette can offer the best and lowest house edge for players when it comes to Roulette. It’s just like European Roulette, but with the added En Prison/ La Partage rules. 

These rules take the house edge of French Roulette to 1.35%.

American Roulette House Edge 

American Roulette can offer the highest house edge when it comes to popular Roulette variations. This is because of the addition of another green 0. 

The house edge in American Roulette is 5.26%

European Roulette House Edge

European Roulette has only one green 0 and is also a great option for Roulette players looking for a low-house edge. 

The house edge in European Roulette is 2.70%.

Which Roulette Variant is Best to Play? 

Now, let’s find out which Roulette variant is the best to play. If you’re looking for the roulette variation that offers the lowest house edge, then the best option would be French Roulette, which has a house edge of  1.35%.

European Roulette (2.70%) is a close second, and American Roulette (5.26%) has the highest overall house edge.

However, it’s up to you to decide which variation you would like to play. You may prefer playing American roulette compared to the French and European versions. It really all comes down to personal preference, as all Roulette games are ultimately a game of chance.

Why Would You Choose to Play American Roulette? 

Interesting question. After all, if American Roulette has the highest house edge, why would anyone want to play it? Well, this could be for 2 reasons. First, players may be unaware of the differences in house edge percentages between the Roulette variations. They may end up playing American Roulette simply because they didn’t know playing the other Roulette variations could potentially be more profitable over time.

Secondly, some Roulette players like the layout of the American Roulette wheel and the simplistic betting style. To play European and French Roulette, you may have to learn specific terms before you can start playing. 

Is There a Way to Beat the House in Roulette? 

There is no sure way to beat the house in Roulette. However, you could potentially improve your odds against the house by following a few techniques. These techniques include but are not limited to:

Multiple bets 

By making multiple bets, you’ll ensure that you cover more area on the table and hence have a higher chance of winning. However, if you win on any particular one, you’ll also lose all your other bets.

Betting strategy

Now that you’re placing multiple bets, the sizes of your bets can also matter. You can assign different betting values to certain areas of the table to try and make a profit from your Roulette betting strategy

Keep in mind that despite following these techniques, the house will have an advantage in the long run, thanks to the house edge. 

Does the House have an Edge in Roulette? 

There’s no beating around the bush here; the house always has a slight edge in Roulette. This means that the odds of the casino winning your money are partially greater than of you winning the casino’s money. All casino games have a house edge, but the house edge in Roulette is one of the lowest available. That means it could be the perfect casino game to play to have a chance at winning, and where better to try your luck at Roulette than here, at King Casino? Simply log in or join if you don’t already have an account to start playing Roulette online.