Blackjack is one of the few casino games where most decisions can be reduced to a mathematically optimal chart. For each player hand and dealer upcard, basic strategy gives the play with the best long-term expected value: hit, stand, double, split, or surrender.
Use this Blackjack Basic Strategy Calculator to check the correct move before or after a hand. Select your hand, the dealer’s upcard and the table rules — H17/S17, double after split, and late surrender — and the tool will show the recommended play with a short explanation.
Blackjack Basic Strategy Calculator
Choose your hand, dealer upcard and rules to get the recommended play.
Need more than strategy? The complete blackjack calculator hub links to house edge, payout, bankroll, EV, side bet and card counting tools.
How to Use the Calculator
- Select your hand type. Use hard totals for hands without a usable Ace, soft totals for hands with an Ace counted as 11, and pairs for two matching ranks.
- Select the dealer upcard. This is the dealer’s visible card.
- Choose the rule profile. H17/S17 and DAS/no DAS can change borderline decisions.
- Enable late surrender if available. Surrender changes some hard 15, 16 and 17 decisions against strong dealer cards.
- Read the recommended move. The result explains why that play is preferred under the selected rules.
Hard Total Strategy
A hard hand has no Ace counted as 11. The core idea is simple: stand more often when the dealer is weak, and hit when the dealer is strong.
| Your Hand | Dealer 2 | Dealer 3 | Dealer 4-6 | Dealer 7-9 | Dealer 10 | Dealer Ace |
|---|---|---|---|---|---|---|
| 17+ | Stand | Stand | Stand | Stand | Stand | Stand* |
| 13-16 | Stand | Stand | Stand | Hit | Hit / Surrender | Hit / Surrender |
| 12 | Hit | Hit | Stand | Hit | Hit | Hit |
| 11 | Double | Double | Double | Double | Double | Hit under S17 / Double under H17 |
| 10 | Double | Double | Double | Double | Hit | Hit |
| 9 | Hit | Double | Double | Hit | Hit | Hit |
| 5-8 | Hit | Hit | Hit | Hit | Hit | Hit |
*In some multi-deck H17 games with late surrender, hard 17 vs dealer Ace can become a surrender decision. The calculator applies this only when both H17 and late surrender are enabled.
Soft Total Strategy
A soft hand contains an Ace counted as 11. Because the Ace can convert to 1, these hands can often hit or double without the same bust risk as hard totals.
| Soft Hand | Dealer 2 | Dealer 3-6 | Dealer 7-8 | Dealer 9-A |
|---|---|---|---|---|
| A-9 / A-10 | Stand | Stand | Stand | Stand |
| A-8 | Stand | Stand / Double H17 vs 6 | Stand | Stand |
| A-7 | Stand / Double H17 | Double | Stand | Hit |
| A-6 | Hit | Double vs 3-6 | Hit | Hit |
| A-4 / A-5 | Hit | Double vs 4-6 | Hit | Hit |
| A-2 / A-3 | Hit | Double vs 5-6 | Hit | Hit |
Pair Splitting Strategy
Pair strategy changes more with DAS rules than hard totals do. When double after split is allowed, small-pair splits become more valuable because you can double after creating a stronger hand.
| Pair | Basic Rule |
|---|---|
| A-A | Always split. |
| 10-10 | Never split. Stand on 20. |
| 9-9 | Split vs 2-6 and 8-9. Stand vs 7, 10, Ace. |
| 8-8 | Always split as a defensive play from hard 16. |
| 7-7 | Split vs 2-7. Hit vs 8-A. |
| 6-6 | Split vs 2-6 with DAS; usually 3-6 without DAS. |
| 5-5 | Never split. Treat as hard 10. |
| 4-4 | Split vs 5-6 only if DAS is allowed. Otherwise hit. |
| 2-2 / 3-3 | Split vs 2-7 with DAS; usually 4-7 without DAS. |
Commonly Misplayed Hands
Hard 16 vs Dealer 10
Without surrender, the chart says hit. With late surrender available, surrender is preferred. Standing feels safer, but it performs poorly because dealer 10 is strong and hard 16 is already behind.
Hard 12 vs Dealer 2 or 3
Many players stand on all hard 12 hands against dealer low cards. The chart is more precise: stand against 4-6, but hit against 2 or 3.
Soft 18 vs Dealer 9, 10 or Ace
Soft 18 looks strong, but against high dealer cards it is often not strong enough. Because the Ace can shift from 11 to 1, hitting is less dangerous than it looks.
Pair of 8s vs Dealer 10
Splitting 8s against a 10 feels aggressive, but it is usually a defensive play. You split to escape hard 16, not because both new hands are expected to win.
Basic Strategy vs Card Counting
Basic strategy assumes you do not know which cards remain in the shoe. Card counting is different: it tracks whether the remaining shoe is rich in high cards and changes bet sizing or a few borderline plays.
| Method | What It Does | Can It Create Positive EV? |
|---|---|---|
| Basic Strategy | Chooses the best fixed play for each player hand and dealer upcard. | Usually no. It minimizes the house edge. |
| Card Counting | Adjusts bets and some decisions based on remaining deck composition. | Potentially yes, under the right rules and penetration. |
Start with the chart first. Counting without correct strategy decisions is not a serious advantage-play system. Once the chart is automatic, the next step is the card counting guide.
Beyond the Strategy Chart
The chart reduces the house edge, but it does not eliminate it. For deeper analysis, use these related tools:
- All Blackjack Calculators — complete hub of strategy, payout, EV and bankroll tools.
- Decision EV Calculator — compare hit, stand, double and split in EV terms.
- House Edge Calculator — calculate rule-set impact.
- Payout Calculator — compare 3:2 vs 6:5 payouts.
- Expected Value Guide — convert house edge into hourly cost.
- Card Counting Guide — learn Hi-Lo and true count logic.
- Session Variance Simulator — model short-term swings.
- Bankroll Calculator — estimate bankroll needs by bet size.
Frequently Asked Questions
What is basic strategy in blackjack?
It is the mathematically best fixed decision for each player hand and dealer upcard under a specific rule set. It tells you when to hit, stand, double, split or surrender.
Does basic strategy guarantee a win?
No. It reduces the house edge but does not remove variance or guarantee a profit. It helps you lose less over time compared with guessing or playing by intuition.
Should I hit or stand on hard 16?
It depends on the dealer upcard and surrender rules. Against dealer 2-6, hard 16 stands. Against 7-A, it hits unless late surrender is available against dealer 9, 10 or Ace.
Should I always split Aces and 8s?
Yes, in standard strategy. Aces are split because each Ace can start a strong hand. Eights are split because hard 16 is one of the weakest totals.
Should I ever split 10s?
No, not in the standard chart. A hard 20 is already very strong, and splitting 10s usually lowers expected value.
Does H17 change the chart?
Yes, but only on a limited number of hands. Common changes include hard 11 versus Ace, soft 18 versus 2, soft 19 versus 6, and some surrender decisions against dealer Ace.
Should I take insurance?
Usually no. Insurance is a separate side bet with a high house edge for non-counting players. It becomes mathematically relevant only when the remaining shoe is rich in 10-value cards.
Is this the same as card counting?
No. The chart is a fixed decision system. Counting changes betting and a few decisions based on the remaining cards in the shoe.
Responsible gambling notice: correct decisions can reduce the house edge, but they do not guarantee profit. Blackjack still involves real financial risk. Never wager more than you can afford to lose.