How do splitting and doubling down work in blackjack?

In the card game of blackjack, splitting and doubling down are strategic moves that allow players to manage their bets and hands:

Splitting

When a player is dealt two cards of the same rank, they may choose to "split" them. This action separates the pair into two independent hands, each requiring an additional bet equal to the original wager. The player then receives a second card for each new hand and plays them separately against the dealer.1

Doubling Down

"Doubling down" involves doubling the original bet in exchange for receiving exactly one additional card. While rules vary by casino, this move is commonly permitted when a player’s first two cards total 11 (or, in some variants, 10 or 11). Once the player doubles their bet, they are dealt one final card facedown to complete their hand.213

These options provide players with opportunities to capitalize on favorable card combinations, though they require careful consideration of the dealer's visible card and the overall state of the game.1