Probability is the engine behind casino games. Casinos do not need to cheat; the rules already do the work.
Explore how Return To Player (RTP) and house edge translate into your balance over time.
IntermediateMath & Probability4 lessons · 25 min
Odds & House Edge Basics
Current lesson
What exactly is house edge?
The margin built into the rules of the game.
Check your understanding
Take one of the short quizzes after this lesson to confirm the concepts and move on with more confidence.
Content is for education only. We explain rules, odds and the house edge so you understand the math — never to encourage real-money gambling.