RNG stands for random number generator, the software behind every result at an online casino, including slots, table games, and online bingo outcomes. The use of a random number generator means that results at UK casino sites are truly random (as close to 100% as possible) and are not changed or manipulated by the operator after a bet is placed.
How Does an RNG Actually Work?
House edge and RNGs are the two key deciding factors that affect a player's chances of winning at any online casino site.
RNGs are based on a computer algorithm where a seed value is assigned as a starting point and used to generate a sequence of random numbers. This is complemented by continuous number cycling which loops through a fixed set of numbers repeatedly. Using this process means that, for example, the result of a spin of a roulette wheel will be predetermined and cannot change during the spin. RNGs also ensure any bonus features will be triggered at random.
Most established and new UK casino sites use a Pseudo-Random Number Generator (PRNG), which runs via a mathematical process rather than true physical randomness, meaning results are never “completely” random but are as close to 100 per cent random as possible.
Which Casino Games Use RNG?
All games controlled by software at online casinos and casino apps have random number generators implemented. This includes online slots, virtual blackjack, video poker and automated table games. The Live Dealer casino works a little bit differently. Real human dealers run the live table games, and broadcast from studios or brick-and-mortar physical casinos.
Why Does RNG Certification Matter?
Independent testing labs like eCogra and Gaming Labs International (GLI) are important for certifying RNG software impartially before launch and retesting it periodically to confirm fairness. This matters as it reassures the bettor that the casino platform is not influencing results.
UK-licensed operators cannot adjust payout odds while a player is in the middle of their session. Certified RNG results can't be tightened or loosened once a game is live. This is why players should choose an online casino that is licensed and regulated by the UK Gambling Commission before playing.
RNG in Live Casino Versus Software-Based Games
Live dealer casino games like live roulette, live blackjack, game shows and live baccarat are truly random with wheel spins, card shuffles and more, all dictated by a human dealer or host. The live dealer experience is similar to physically playing in your own living room. The live dealer games are broadcast and live-streamed from studios or physical casinos that supply games to online casinos. Evolution Gaming and Pragmatic Play are two of the biggest software providers for live dealer games.
Random number generators still play a part in live dealer games as a supporting role. This is true, for example, when assigning random multipliers in bonus rounds or during bonus features in Game Shows.
Responsible Gambling
The fairness of a random number generator does not change the odds of winning long-term; payout percentages are still fixed and noted in the information section of the games. Players should still set deposit limits and time limits regardless of RNGs and provably fair algorithms being in play.
The Standard suggests readers bet for entertainment purposes only and never chase losses. If you or anyone you know are struggling with problem gambling activity, use the 24/7 support resources below: GamCare (0808 8020 133), BeGambleAware.org, GAMSTOP.
FAQs
What does RNG mean in online casinos? RNG stands for Random Number Generator, a software implemented into online casino games to make the results are as random as possible, using an algorithm.
Does a higher RTP mean a fairer RNG? No, random number generators are set to be as close to 100% “random” as possible. Provably fair algorithms all run on a predetermined basis and don’t change depending on the payout percentage of the game.
We aim to offer every online gambler and reader of The Standard a safe and fair platform through unbiased reviews and offers from the UK's best online gambling companies. Gambling can be addictive, always play responsibly and only bet what you can afford to lose. Gambling sites have a number of tools to assist you to stay in control, including deposit limits and time outs. If you think you have a problem, advice and support is available for you now from BeGambleAware or Gamcare. Any offers or odds listed in this article are correct at the time of publication but are subject to change. Terms & Conditions apply to all offers.
