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Understanding Casino Math and the House Edge
Candra Rous edited this page 2026-08-05 00:53:03 -05:00


Casinos are incredibly profitable businesses, and their success relies entirely on cold, hard mathematics.

The house edge is the built-in mathematical advantage that the casino holds over the player in every game.
How Casinos Create the Edge
If a game paid out at exactly the true odds, the casino would eventually break even and go bankrupt.

However, if you win a straight-up number bet, the casino only pays you 35 to 1.
Every single game has a mathematically defined edgeIt represents the percentage of each bet the casino keepsSkill-based games usually offer lower house edges Understanding Return to Player (RTP)
RTP is simply the inverse of the house edge, expressed as the percentage of money returned to players.

This means that over millions of spins, the machine will pay back $95 for every $100 wagered.
Games with the Lowest House Edge
Smart players actively seek out games where the mathematical advantage of the casino is incredibly thin.

Conversely, games like Keno or the Tie bet in Baccarat feature massive edges exceeding 14%.
Game OptionExpected ReturnDifficultyVideo Poker99.5%+HighAmerican Roulette94.74%None
Accept the edge as the price of admission for the entertainment, and gamble responsibly.