Understanding how casino odds are calculated is essential for online casino operators who want to ensure fairness, compliance, and long-term profitability. Unlike traditional betting environments, online casinos rely on advanced software and mathematical models to deliver consistent and transparent outcomes to players.
iGaming odds are calculated differently depending on the solution and provider. While sports odds are determined based on the real-time data received from sports sources, all gaming software online casino developer releases have built-in odds from the baseline. Mathematics, probability, and predefined payout structures are responsible for setting realistic odds, which do not fluctuate, even if the number of players or wagers changes.
As an operator, you should know how this process works to understand when your software is outdated, and you have to work with a reliable provider like Soft2Bet to upgrade it. Let’s dive in.
Random Number Generators (RNGs)
A Random Number Generator, or RNG, is the spine of every online casino. This is a mathematical algorithm that automatically produces random results for every game. For example:
- in slots, the RNG is responsible for deciding the symbols on the reels;
- in roulette, the system determines the winning number;
- in card games, all cards dealt to the players are completely random with a Random Number Generator.
RNG is not just randomized — it’s also independent of every other result. Past spins, rounds, and hands do not dictate what happens in the future. That is how every online casino game stays fair. Even operators can’t influence the game results.
Game Probability
Casino odds calculated by the RGN are also based on probability. Game probability is defined during the development process: every outcome has a certain chance of occurring. European roulette, for instance, can have 37 possible results. So, the game probability for this one is 1 in 37.
Software providers and game designers for online casinos base the games on mathematical probabilities. If the number is high and the desired outcome is harder to achieve, the payout is higher, too. In case the number is low, the payout is lower, as well. This is the common balance in online casinos, forming the odds.
Return to Player (RTP) and the House Edge
Return to Player, or RTP, is one more vital component of the online casino odds calculation. The RTP is calculated in percentages and determines how much money from the wager will be paid out to the player over time. For instance, when a player wagers around 100 units in slots, about 96 units will return to them at a 96% RTP.
The other 4 units are a house edge — an integrated advantage for the casino. It’s a percentage of each wager expected to return to the platform operators, which allows them to keep the business afloat. This number is always fixed.
Casino Odds ─ Always Fair
When a player places a bet at an online casino, they expect fair results. Operators, on the other hand, need a constant advantage to fund their businesses. Both are combined in an odd calculation software, which includes the RNG, mathematical probability, and RTP. These components guarantee random, independent, and fixed outcomes regardless of the number of players or wagers — vital for online casinos.
