House edge is expressed as a percentage and represents the average loss a player can expect over time relative to their initial wager. For example, a game with a 2% house edge means that, theoretically, a player wagering $100 would lose an average of $2 to the house. This mathematical advantage exists across all casino games and is how casinos maintain their business model.
The house edge varies significantly between different games. Some games offer relatively favorable odds for players—such as blackjack with a skilled basic strategy player—while others like keno and certain slot machines carry much higher house advantages. Understanding these differences is crucial for players who want to maximize their entertainment value and minimize their expected losses.
It's important to note that house edge represents long-term mathematical expectations. Individual sessions, particularly short-term play, can deviate significantly from these averages due to variance and luck. However, the longer you play, the more your actual results will align with the mathematical house edge.