The house advantage in blackjack is about 2.5 to 3.0 percent, meaning that for every 100 hands of blackjack, the house will win about 23 hands and lose about 76 hands. This advantage is cumulative, meaning that the house’s advantage is increased by the percentage of hands in which it wins.
For example, if the house wins 75 percent of the hands in a game, its advantage would be increased to 8.5 percent.
