To calculate your expected return in Blackjack, you need to consider the house edge, your bet size, and the strategy you use. The house edge represents the casino's advantage and typically ranges from 0.5% to 1%. Using optimal basic strategy minimizes this edge. Your expected return is calculated by multiplying your bet size by (1 - house edge). For example, with a $10 bet and a 0.5% house edge, you would expect to win $9.95 on average per hand. Factors like special payouts, such as 6:5 for blackjack, can alter the expected return. While the expected return provides a long-term outlook, short-term results can vary due to the game's natural variance.