Blackjack is the most popular casino game in the world, due, in part, because many people believe they can beat the House at it. While this is true, for casual players, the House has a substantial advantage. Casinos use an intentionally confusing system of varying numbers of decks and rules to gain an advantage on the player. Blackjack Odds Master allows you to calculate estimated returns over thousands of hands under any rules or number of decks. In addition, Blackjack Odds Master can calculate your playing efficiency and help you improve your game so you maximize your winnings.