Blackjack basics: card values, terms and how a hand plays out

Blackjack is one of the most widely played card games in the world, and its core idea fits in one sentence: build a hand worth more than the dealer's without going over 21. This guide explains how the game is scored and how a round unfolds. It is written for adults 18 and over, it describes rules only, and it is not a suggestion to gamble. Gambling laws differ by country and, in the United States, by state.

How the cards are scored

Every card has a fixed point value:

• Cards 2 through 10 count as their number.
• Jacks, queens and kings each count as 10.
• Aces count as either 1 or 11, whichever helps the hand more without busting.

A hand containing an ace counted as 11 is called a soft hand, because drawing another card cannot bust it right away. An ace and a 6 make a soft 17. A hand with no ace, or one where every ace must count as 1, is a hard hand.

How a round runs

Before any cards are dealt, players place their bets within the table limits. The dealer then gives two cards to each player and two to themselves, with one dealer card face up and one face down. Each player acts in turn, and only after all players have finished does the dealer turn over the hidden card and complete the hand.

If your total is closer to 21 than the dealer's, and you have not gone over, you win. If you go over 21, you bust and lose the hand immediately, even if the dealer would have busted later. If the totals match, the hand is a push and the original bet is returned.

Key terms you will hear

• Hit: take another card.
• Stand: keep your current total and end your turn.
• Double down: double your bet in exchange for exactly one more card.
• Split: when your first two cards have the same value, divide them into two separate hands, each with its own bet. Rules on splitting vary from table to table.
• Blackjack: an ace plus a ten-value card as your first two cards.
• Insurance: a side bet offered when the dealer shows an ace. Its terms depend on the table.

Payouts and house rules matter

A natural blackjack usually pays 3 to 2 at standard tables, meaning a 10-unit bet returns 15 units in profit plus the original stake. Some tables pay less, such as 6 to 5, which noticeably lowers the player's long-term expectation. Other rules also change the math, including how many decks are in play, whether the dealer draws on a soft 17, and when doubling or splitting is allowed. Reading the table rules before sitting down is the single most useful habit.

Skill, luck and the house edge

Blackjack is unusual because some decisions are mathematically better than others. Published basic strategy charts show the best play for each combination of your hand and the dealer's face-up card. Following them reduces the casino's edge but does not remove it, and it cannot protect you from short-term swings. A perfect decision can still lose, and a poor one can still win in the moment. Claims that a system guarantees profit should be treated with suspicion.

Card counting is often mentioned in popular culture. It is legal as a mental skill in some places but casinos may ask counters to leave, and it requires large bankrolls and discipline that make it impractical for most people. It is not a shortcut to steady winnings.

Keeping it in perspective

Because every hand is quick, losses can build faster than players expect. Set a spending limit and a time limit before you start, and stop when you reach either one. If you notice yourself raising bets to win back losses, treat that as a signal to step away.

Frequently asked questions

Is the dealer allowed to make choices?

No. The dealer follows fixed rules for when to draw and when to stand, which can differ slightly between tables.

Why is an ace worth both 1 and 11?

The flexible value lets the hand adjust to the best total that does not exceed 21.

Does knowing basic strategy guarantee a win?

No. It helps you make better decisions, but the game still carries a built-in house edge and results vary widely in the short run.