Blackjack is popular partly because, played correctly, it’s one of the lowest-edge games in the casino. Here’s the gist.
The basics
You aim to beat the dealer’s hand without going over 21. Cards 2–10 score their value, face cards score 10, and an ace is 1 or 11. You choose to hit (take a card), stand, double or split — and those choices are what make blackjack a game of decisions, not just luck.
Why the edge is low
Because your decisions affect the outcome, following “basic strategy” (the mathematically best move for each hand) can shrink the house edge to well under 1% on good rules. That’s far lower than a typical slot. But note: strategy reduces the edge, it doesn’t remove it — the house still wins over time.
Watch out for
- Side bets (insurance, 21+3, etc.) usually carry a much higher edge — they quietly undo the low base-game edge.
- Rule variations matter: dealer-hits-soft-17, blackjack payouts of 6:5 instead of 3:2, and limited doubling all raise the edge.
See also casino game types for how blackjack compares.