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

Randomness is a key part of casino games. They are random games of chance that have unpredictable outcomes. But how does every round become random?

We’ll show you how some popular online casino games achieve randomness.

What Does RNG Mean?

RNG is a popular phrase often associated with online table games or online slots. It’s an abbreviation for Random Number Generator, a microchip that uses a complex mathematical algorithm to produce random number sequences. 

Each number sequence corresponds to a random outcome, and they process large quantities of number sequences each second.

Their purpose is to ensure random and fair gaming practices. A third-party company typically tests a game’s RNG to ensure it meets a certain standard of randomness.

An RNG doesn’t necessarily have to be technologically advanced. Coin flipping and dice rolling are two prime examples of Random Number Generators, online casino games just use a more advanced form of the same concept.

How Does The RNG Work In Online Casinos & Slots

There are two types of RNGs: a True Random Number Generator (TRNG) and a Pseudo Random Number Generator (PRNG). Both produce random outcomes through different strategies.

Casino games use a PRNG to function. As mentioned above, it uses an algorithm that generates random number sequences, while TRNGs use a mechanical process. PRNGs don’t require external influence to generate results.

PRNGs replace dealers in online table games like blackjack and roulette. For example, while a dealer in a physical casino would shuffle and draw cards from the deck, in online blackjack, the PRNG generates a number sequence that corresponds to a random card in the deck.

In online slots, the number sequence corresponds to a random array of symbols on the reels. The slot then translates the display of symbols, and if matching ones land in a way that forms a winning combination, then a payout is awarded.

Although RNGs are popular in online casino games, some land-based casinos also use the technology. Examples include; video poker games and video slots.

Can You Beat The Random Number Generator?

No. You cannot beat the Random Number Generator. This is because the system uses a seed value that gets put through the algorithm. And, there’s no way of knowing what the RNG is using for seed values or the algorithm it is using to produce the number sequences.

In addition, the RNGs process millions of values in a short space of time, so there’s no way to keep up.

Every outcome is unpredictable, so attempting to beat the RNGs is futile. 


Online casinos use a Random Number Generator (RNG) to produce random outcomes that are fair and unpredictable. They work by running a seed value through a complex algorithm that results in a number sequence. 

This sequence is then translated into a displayed outcome, such as a random combination of symbols on the reels of a slot game, a random card being dealt in blackjack, or the pocket the ball lands in on a spin of the roulette wheel.Most importantly, the outcomes produced are random and unpredictable, meaning the RNG cannot be beaten.