What Does RNG Mean In Online Casinos & How Does It Work?

Casino Games are random games of chance with outcomes that cannot be predicted. This is due to the use of Random Number Generators, also known as RNG’s. 

In this article, we explain what an RNG (Random Number Generator) is and how popular online casino games use it to produce unpredictable results.

What Does RNG Mean?

RNG stands for Random Number Generator, a term commonly used for online table games and slots. In gaming, it usually refers to a microchip that runs a complex mathematical algorithm to produce sequences of random numbers.

Each sequence maps to a game outcome, and RNGs generate very large numbers of sequences every second. This rapid processing is what creates the unpredictable results players see.

The main purpose of an RNG is to ensure random and fair play. Independent third-party companies typically test a game’s RNG to verify it meets established standards of randomness.

An RNG does not have to be electronic. Simple methods such as coin flipping and dice rolling are examples of Random Number Generators, with online casino games using a more advanced, electronic form of the same principle.

How Does the RNG Work in Online Casinos & Slots

There are two types of random number generators: True Random Number Generators (TRNGs) and Pseudo Random Number Generators (PRNGs). Both produce random outcomes but use different methods to do so.

Online casino games use PRNGs. A PRNG runs an algorithm that generates sequences of numbers, while a TRNG relies on a mechanical or physical process. PRNGs do not need any external input to produce results.

In online table games such as blackjack and roulette, PRNGs perform the role that dealers do in a land-based casino. For example, where a physical dealer would shuffle and draw cards, an online blackjack game uses a PRNG to generate a number that corresponds to a specific card in the deck.

For online slots, the PRNG produces a sequence of numbers that maps to an array of symbols on the reels. The game translates those numbers into the visible symbols, and if matching symbols line up to form a winning combination, the game awards a payout.

Although RNGs are most commonly associated with online gaming, some land-based casinos also use the technology. Common examples include video poker machines and video slots.

How Does the RNG Work in Online Casinos & Slots

Can You Beat the Random Number Generator?

No. You cannot beat the Random Number Generator. The system starts with a seed value that is processed by an algorithm, and neither the seed nor the algorithm is publicly known.

RNGs also process millions of values in a very short space of time, so it is not possible to track or predict their output from moment to moment. Any attempt to infer future numbers from past results is ineffective.

Every outcome is therefore unpredictable. Trying to outsmart the RNG will not produce reliable results.

The Bottom Line

Online casinos use a Random Number Generator (RNG) to produce outcomes that are fair and unpredictable. The RNG starts with a seed value and runs it through a complex algorithm to generate a sequence of numbers.

That number sequence is translated into the visible result you see. For example, it determines the combination of symbols on a slot reel, which card is dealt in blackjack, or which pocket the ball lands in on a roulette spin.

Most importantly, the outcomes produced are random and unpredictable, meaning the RNG cannot be beaten.


**The information provided in this blog is intended for educational purposes and should not be construed as betting advice or a guarantee of success. Always gamble responsibly.