You cannot calculate the casino payout rates objectively unless you have all the money in the world to play infinitely long. There are three typical payout rates specified by the highest payout online casinos:
The average monthly payout rate for all casino games.
The average monthly payout rate for a specific game type (for example, roulette, casinos, baccarat, blackjack, etc.)
The average payout rate for a specific game (for instance, Book of Dead, Immortal Romance, European Roulette, etc.)
The payout rate of 96% and higher is considered pretty generous.