Understanding RNG

Random Number Generators (RNGs) are the backbone of fair play in online gambling. They ensure that the outcome of games is completely random and unbiased. Understanding how RNGs work is crucial for players who want to make informed decisions and enjoy a fair gaming experience. This article explores the concept of RNG, its importance, and how it operates in online gambling.

What is RNG?

A Random Number Generator (RNG) is a computational algorithm used to produce a sequence of numbers that cannot be reasonably predicted better than by random chance. In the context of online gambling, RNGs are used to determine the outcomes of games such as slots, poker, roulette, and more.

Types of RNG

True RNG

True RNGs generate randomness from physical processes, such as electronic noise.

Rarely used in online gambling due to the complexity and cost of hardware requirements.

Radioactive decay or thermal noise.


Pseudo-RNGs use algorithms to produce long sequences of numbers that only appear random.

Commonly used in online gambling because they are efficient and reliable.

Mersenne Twister, Linear Congruential Generator.

How RNG Works in Online Gambling

The RNG is initialized with a seed value. This seed can be based on various factors, such as the current time or other unpredictable inputs.

  • The RNG algorithm processes the seed value to generate a sequence of random numbers. These numbers are then used to determine game outcomes.

Example: In a slot game, the RNG might determine the symbols that appear on the reels after each spin.

  • RNGs are regularly tested and certified by independent auditing firms to ensure they produce unbiased and unpredictable results.

Examples of Auditing Firms: eCOGRA, iTech Labs, GLI (Gaming Laboratories International).

Importance of RNG in Online Gambling

  • Ensures that every player has an equal chance of winning.
  • Prevents manipulation of game outcomes by the casino or players.

  • Maintains the credibility and trustworthiness of online casinos.
  • Protects the casino from accusations of unfair play.

  • Builds trust among players, knowing that games are fair and random.
  • Encourages continued participation and engagement.

Common Misconceptions about RNG

Patterns and Predictability

RNGs can develop patterns that players can exploit.

Properly implemented RNGs produce sequences that are effectively random and unpredictable.

Previous Outcomes Affecting Future Results

The results of previous spins or games can influence future outcomes.

Each outcome is independent and not influenced by previous results.

Casino Manipulation

Online casinos can alter RNGs to ensure players lose.

Reputable casinos use RNGs that are regularly audited and certified for fairness.

How to Verify RNG Fairness

Look for certification from independent auditing firms such as eCOGRA, iTech Labs, or GLI.

Reputable casinos will provide information about their RNG testing and certification processes.

Research player reviews and the casino’s reputation in the online gambling community.


Understanding RNG is essential for appreciating the fairness and integrity of online gambling. RNGs ensure that game outcomes are random and unbiased, providing a fair chance for all players. By choosing reputable online casinos with certified RNGs, players can enjoy a secure and trustworthy gaming experience. Always verify the casino's RNG certifications and stay informed to protect yourself and enjoy fair play.