Blackjack Basic Strategy Calculator

Choose hit, stand, double, split or late surrender

Select your two cards and the dealer upcard, then set S17 or H17, double after split and late surrender. The result applies to a four-to-eight-deck shoe with a dealer blackjack check. It does not cover infinite decks or European no-hole-card games.

• S17 means the dealer stands on soft 17. H17 means the dealer hits it.
• Late surrender gives up half the bet after the dealer checks for blackjack. Early surrender is a different rule.
• Against a dealer 10, hard 16 surrenders when allowed, otherwise hits. A pair of 8s is a different chart row.
• Select the double fallback if doubling is unavailable on your starting hand.

Match the surrender and dealer rules before using the chart

With late surrender, a $10 bet loses $5 immediately. That known loss can be lower than the average cost of hitting or standing. It does not mean surrender is best for every weak hand. Your cards, the dealer upcard and the table rules still decide the action.

In this multi-deck chart, H17 adds surrender for hard 15, hard 17 and a pair of 8s against an ace. Hard 16 against 9, 10 or ace already surrenders in S17. If surrender is unavailable against an ace, choose the restricted surrender setting so those ace cells return to their usual action.

DAS means double after split. It changes some pair decisions, but it is not the same as permission to double the current hand. D means double, otherwise hit. Ds means double, otherwise stand. Rh, Rs and Rp mean surrender with a hit, stand or split fallback.

Use the calculator to practise decisions under the listed rules. It does not predict a card, calculate the exact house edge, or establish that an operator accepts your country. Check the specific game's published rules before treating an operator as a match.