How are the RTP and the house edge calculated in roulette?

As I have already mentioned, roulette is a relatively simple game, so it is quite easy to calculate the RTP and the house edge. In this part of the article, I will explain why the casino always has an advantage in roulette, since it is something mathematically related to the operation of this game and its odds.

To do the calculations, I will use European 96Ace online casino roulette without special rules. However, these same calculations can be used for other types of roulette, with some changes that make this game more or less advantageous for the casino.

You could go ahead and do calculations like these for every possible bet of European roulette, but it is not necessary. Roulette bet payouts are calculated using the same formula, which means that each European roulette bet has the same RTP of 97.3% (statistically, the player wins $ 0.973 for every $ 1 wagered).

In the case of American roulette, the calculations are very similar. All you have to do is replace each number “37” in your calculations with “38” since there are 38 possible outcomes in a double zero roulette game.

All results are less likely to occur in American roulette than in European roulette (other than “00”, which does not exist on the roulette wheel of zero), while the payouts are the same. This is precisely why American roulette has a worse RTP of 94.74%.

Furthermore, American roulette has a bet with an even worse RTP (92.1%). This is due to the non-standard odds of winning (5/38) and the payouts (bet x7) of the “top line” bet. The calculation of the RTP for this bet is: Expected value (bet on the top line of $ 1) = $ 7 * (5/38) = 35/38 = 0.921.

The house margin can be easily calculated using RTP as follows:

House margin = 1 – RTP


Roulette is not the most likely to win a casino game, nor is it the most exciting. However, many believe it to be the classiest board game out there, making it a great experience.

In addition, roulette has very simple rules and offers fairly good odds to the player. It can be played even without knowing the mechanics of the game, although I think it is always good to do a little research and study to understand the basic operation and make good decisions.

So I decided to write this article. I hope you found it useful and I wish you good luck at the roulette tables if you decide to try your luck with this game.