Blackjack Hand Value Calculator

Aces begin at 11 and automatically fall to 1 whenever that prevents or reduces a bust. The result also tells you whether the total is soft, whether a two-card hand is a natural blackjack, and whether the hand is still over 21. Every code must identify one unique card from a standard 52-card deck, so malformed cards and impossible duplicates produce a clear input error.

Enter a real hand from a standard deck

Write each card as its rank followed immediately by its suit. Ranks are 2 through 10, J, Q, K, and A; suits are C for clubs, D for diamonds, H for hearts, and S for spades. Separate cards with spaces or commas, so AS 10H and AS,10H describe the same two-card hand. Letter case does not matter because codes are normalized before calculation. The calculator validates the complete code rather than guessing what a partial label means. For example, A without a suit is not a card in the standard 52-card set, and 1H is not an accepted substitute for AH. It also rejects the same exact card twice. Two kings of different suits are valid, but two copies of KS are impossible when the input represents one physical deck. These rules make the result suitable for game logic, test fixtures, tutorials, and hand-history processing where silently accepting an invented card could hide a larger data problem. A hand must contain at least one card and cannot contain more than the 52 unique cards available in the deck.

How ace adjustment finds the best total

The calculation first values every ace as 11, every face card as 10, and every numbered card at its printed rank. If that initial sum exceeds 21, the calculator changes one ace at a time from 11 to 1, subtracting 10 for each change. It stops as soon as the total is 21 or lower, or when no ace valued at 11 remains. This produces the highest total available under blackjack ace rules without busting whenever such a total exists. Consider AS 7D 3C: the initial value is 21, so the ace remains 11 and the result is a soft 21. For AS 7D 8C, the initial 26 becomes 16 after the ace falls to 1. Multiple aces use the same process: AS AD 9C starts at 31, then one ace changes to 1 for a final 21. The response reports how many aces were counted each way, making the adjustment transparent. If the total still exceeds 21 after all aces become 1, the hand is correctly marked as a bust rather than being forced into a legal score.

Read soft totals, blackjack, and bust status

The primary result is total, the best blackjack value of all supplied cards. The soft flag is true when at least one ace still counts as 11 in that best total. A soft hand has flexibility because drawing a high card may turn that ace into 1 instead of immediately causing a bust. The blackjack flag follows the usual natural-hand definition: it is true only when exactly two cards total 21. A three-card 21 is a valid 21 but is not labeled blackjack. The bust flag is true when the best possible value remains above 21, including after every ace adjustment. Additional fields provide the card count and the numbers of aces valued at 11 and 1, so applications do not need to reconstruct those facts from the original text. This distinction is useful in user interfaces and automated rules engines: a total alone cannot tell you whether 21 is natural, whether 18 is soft, or whether an ace has already lost its protective high value. Via the API, each deterministic calculation costs $0.002 per request.