Make the right blackjack decision before checking the answer. Enter your two cards and the dealer’s upcard to find the basic-strategy recommendation for your hand.
Our calculator uses a 6-deck game with S17, double after split (DAS), and 3:2 blackjack payouts. It covers the four core decisions – hit, stand, double down and split.
Basic strategy cannot predict the result of an individual hand or guarantee a win. Its purpose is to help you consistently choose the mathematically preferred play and avoid unnecessary decisions based on instinct or guesswork.
Blackjack Calculator Basic Strategy
Not sure whether to hit, stand, double down or split? Use the blackjack basic strategy calculator below to check the mathematically preferred decision for your hand.
Enter your two cards and the dealer’s upcard, then select Calculate Strategy to see the recommended move and a short explanation of why that decision is used.
The calculator is based on a 6-deck, S17, DAS blackjack ruleset with 3:2 blackjack payouts, double down allowed on any two initial cards and no surrender. It does not predict the outcome of an individual hand, guarantee a win or eliminate the house edge.
Basic Strategy Calculator
Check the mathematically preferred play for your hand.
- Decks: 6-deck shoe
- Dealer: Stands on soft 17 (S17)
- Blackjack: Pays 3:2
- Double: Allowed on any initial two cards
- Double after split: Allowed
- Surrender: Not included
- Insurance: Not included
This calculator uses standard total-dependent basic strategy for a 6-deck S17 DAS game. It does not account for card counting or other advanced strategy deviations.
Calculator Rules
6 decks · S17 · 3:2 blackjack · DAS · Double on any two cards · No surrender
The calculator uses a 6-deck blackjack ruleset with S17, 3:2 blackjack payouts, double after split and double down allowed on any two initial cards. Surrender is not included.
Basic-strategy recommendations can change when table rules differ. Make sure the blackjack game you're playing matches these settings before relying on the calculator's recommendation.
Practice Your Blackjack Strategy
One of the best ways to improve your understanding of basic strategy is to practise making decisions while playing blackjack.
Use the calculator above when you are unsure about the mathematically preferred move for a particular hand. Then try the blackjack demo below and put those decisions into practice as you play.
The goal isn't to predict whether a hand will win. Basic strategy is about choosing the mathematically preferred decision based on your cards and the dealer's upcard.
Play Blackjack While You Practise
The interactive blackjack game below gives you the opportunity to play blackjack and practise applying basic strategy in a live game environment.
When you receive a hand, look at your two cards and the dealer's upcard. If you are unsure whether to Hit, Stand, Double or Split, check the basic strategy calculator above before making your decision.
Use the calculator as your reference, then put the strategy into practice in the game below.
Game Information
Practice the Decision, Not the Outcome
The calculator can show you the mathematically preferred move, but the real benefit comes from learning to recognise that decision yourself.
Before checking the calculator, take a moment to look at your two cards and the dealer's upcard. Decide what you would do first - hit, stand, double or split - then use the calculator to check your decision.
The result of the hand is not the important part. You can make the correct basic-strategy decision and still lose, just as you can make the wrong decision and still win.
Use the blackjack demo to build the habit of making decisions based on the information available at the table, rather than reacting to previous hands or trying to predict what card will come next.
Try different hands and pay particular attention to situations that feel less obvious. With practice, common basic-strategy decisions become easier to recognise without having to stop and think about every hand.
What Is Blackjack Basic Strategy?
Blackjack basic strategy is a set of mathematically calculated decisions that determines the preferred play for different player hands against each possible dealer upcard.
In simple terms, it answers one question:
Given the cards I have and the card the dealer is showing, what is the mathematically preferred move?
Depending on the situation, that decision can be to hit, stand, double down or split.
Basic strategy does not attempt to predict the next card or guarantee the result of an individual hand. Instead, it compares the expected outcomes of the available plays and identifies the decision with the strongest mathematical expectation under a particular set of blackjack rules.
That is why the dealer's upcard matters so much. The same player total can have a different recommended decision depending on whether the dealer is showing a low card, a high card or an Ace.
The calculator above is designed to make those decisions easier to understand and practice. If you're learning the game from the beginning, our blackjack guide covers the fundamentals before you start applying basic strategy. Enter your two cards and the dealer's upcard, then compare your own decision with the calculator's recommendation.
With repeated practice, the goal is for common situations to become familiar enough that you can recognize the correct basic-strategy move more quickly at the table.
Understanding Blackjack Hand Types
The easiest way to become comfortable with basic strategy is to understand the three main types of starting hands: hard hands, soft hands and pairs.
Each type is treated differently because the cards create different mathematical possibilities. The dealer's upcard then determines which decision is preferred.
You do not need to memorize every combination immediately. Start by recognizing what type of hand you have, then consider the dealer's upcard.
Hard Hands
A hard hand is a hand where an Ace is either not present or must be counted as 1.
For example, 10-6 is a hard 16.
Hard hands are often where the dealer's upcard has the biggest impact. A hard 16 against a dealer 6 is a very different situation from a hard 16 against a dealer 10.
As a general pattern, stronger hard totals tend to stand, while lower totals often provide opportunities to hit or double. Middle totals require more attention to the dealer's upcard.
Soft Hands
A soft hand contains an Ace that is currently being counted as 11.
For example, A-6 is soft 17.
The Ace gives the hand additional flexibility because it can change from 11 to 1 if necessary. This means soft hands can be played differently from hard hands with the same numerical total.
For example, soft 17 and hard 17 are not treated as the same situation in basic strategy.
Pairs
A pair occurs when your first two cards have the same value, such as 8-8, 9-9 or A-A.
Pairs have their own basic-strategy decisions because splitting creates two separate starting hands.
Some pairs have consistent basic-strategy decisions under the rules used by the calculator. Under this ruleset, Aces and 8s are split, while a pair of 10-value cards is generally kept as 20.
Other pairs depend on the dealer's upcard and the rules of the game.
The calculator handles these situations individually, so you can use it to check a decision while learning the underlying patterns.
How the Calculator Determines the Recommended Move
Every blackjack decision has a mathematical expectation.
When you choose whether to hit, stand, double or split, each option produces a different range of possible outcomes. Basic strategy compares those outcomes under the rules of the game and identifies the play with the strongest expected result.
You do not need to calculate these probabilities yourself at the table. The mathematics has already been worked out, which is why strategy charts and calculators can provide a recommendation for a specific hand.
The dealer's upcard is particularly important. A dealer showing a low card can be in a more vulnerable position, while a high upcard gives the dealer a stronger chance of making a competitive total.
This is why a hand that looks identical at first glance can require a different decision depending on the dealer's card.
For example, the mathematically preferred play for a hard 16 can change depending on whether the dealer is showing a 6 or a 10.
The important point is that basic strategy isn't trying to predict exactly what will happen on the next card.
It is designed to help you make the decision with the best expected mathematical outcome over many hands, based on the information available at the time.
How Basic Strategy Affects the House Edge
No. Basic strategy does not eliminate the house edge or guarantee that you will win.
Its purpose is to reduce the mathematical disadvantage created by the game rules by helping you choose the mathematically preferred play in each situation.
You can follow basic strategy perfectly and still lose several hands in a row. Blackjack has short-term variance, so the result of an individual hand can be very different from its long-term mathematical expectation.
The reverse is also true. A player can make a mathematically incorrect decision and still win a particular hand.
That doesn't make the decision correct.
The value of basic strategy comes from making the mathematically preferred decisions consistently over a large number of hands.
The exact house edge depends on the complete rules of the blackjack game, including the number of decks, blackjack payout, whether the dealer hits or stands on soft 17, and the rules governing doubling, splitting and surrender.
This is why the rules matter just as much as the strategy being used.
What Basic Strategy Can Do
- Help reduce avoidable playing mistakes.
- Identify the mathematically preferred move for a given situation.
- Give you a consistent decision-making framework.
- Help you understand how the dealer's upcard affects your play.
What It Cannot Do
- Guarantee a winning session.
- Predict the next card.
- Remove the house edge.
- Eliminate short-term losing streaks.
- Make an unfavorable ruleset mathematically favorable.
Common Blackjack Basic Strategy Mistakes
Knowing basic strategy is one thing. Applying it consistently is another.
Many blackjack mistakes come from reacting to the previous hand, trying to predict what will happen next, or treating every hand as an isolated decision without considering the dealer's upcard.
Here are some of the most common mistakes to avoid.
"I Busted Last Time, So I'll Stand This Time"
The result of a previous hand doesn't change the mathematics of the current one.
If you have a hard 16 against a dealer 10, the correct decision is based on that current situation - not on whether you happened to bust the last time you hit a 16.
Every hand starts with a new set of circumstances.
"The Dealer Has Won Several Hands in a Row"
A run of previous results does not mean the dealer is due to lose.
The next hand is not influenced by whether the dealer won or lost the previous five hands. Trying to predict the next result based on a recent streak is a common example of the gambler's fallacy.
Base the decision on your cards, the dealer's upcard and the rules of the game.
"I Should Never Hit 17"
This depends on what type of 17 you have.
A hard 17 and a soft 17 are different hands.
For example:
- 10 + 7 = hard 17
- A + 6 = soft 17
The Ace gives a soft hand additional flexibility, so the two situations can have different basic-strategy decisions.
"I Won, So My Decision Must Have Been Correct"
Winning a hand doesn't necessarily mean you made the mathematically preferred decision.
Likewise, losing doesn't automatically mean you made the wrong decision.
Basic strategy is concerned with the expected mathematical result of a decision, not the outcome of one individual hand.
This distinction is important when learning. If you make the correct decision and lose, don't immediately change your strategy because of the result.
"Basic Strategy Is the Same as Card Counting"
Basic strategy and card counting are different concepts.
Basic strategy uses your current hand, the dealer's upcard and the rules of the game to determine the preferred play.
Card counting is a separate technique that attempts to estimate how the composition of the remaining cards affects the odds.
You do not need to count cards to learn or use basic strategy.
"The Next Card Has to Be a 10"
There is no reliable way to know what the next card will be simply because certain cards have recently appeared.
Basic strategy does not require you to predict the next card. It uses the information available now to select the mathematically preferred action.
Online Blackjack vs Live Dealer Blackjack
Basic strategy can be used for both online blackjack and live dealer blackjack.
The important factor is not whether the cards are dealt by software or by a live dealer. It is whether the strategy you're using matches the rules of the game.
Different blackjack tables can have different rules, and those differences can affect the mathematically preferred decisions.
Online RNG Blackjack
Online RNG blackjack uses software to determine the cards according to the game's programmed rules.
Before playing, check the table information for details such as:
- Blackjack payout
- Number of decks
- Whether the dealer stands or hits on soft 17
- Double-down restrictions
- Double after split
- Surrender availability
- Any other unusual table rules
Don't assume that two online blackjack games use the same rules simply because they look similar.
Live Dealer Blackjack
Live dealer blackjack uses a real dealer and physical cards, with the game streamed to your device. It is part of the wider live dealer casino experience, which includes other casino games hosted by real dealers.
The same basic-strategy principles apply, but the rules can vary from one live table to another.
For example, one table may offer 3:2 blackjack and S17, while another may use a different payout or dealer rule.
Always open the table rules before playing and make sure they match the assumptions used by your strategy chart or calculator.
The Key Difference
The important question isn't:
"Is this game online or live?"
It is:
"Do the rules of this game match the strategy I'm using?"
If the rules change, some basic-strategy decisions can change as well. That's why the calculator on this page uses a clearly defined ruleset rather than presenting its recommendations as universal for every blackjack table.
How to Choose a Blackjack Game
Basic strategy can help you make mathematically informed decisions, but the rules of the blackjack table also matter.
Before you start playing, take a moment to check the rules rather than assuming every blackjack game is the same.
Small differences in payouts, dealer rules and player options can affect the house edge and, in some situations, the basic-strategy decision itself.
Check the Blackjack Payout
The blackjack payout is one of the first things to look for.
A traditional 3:2 blackjack payout means a $10 blackjack produces a $15 profit, while a 6:5 payout produces a $12 profit.
That difference applies whenever a natural blackjack is paid and can have a meaningful effect on the game's mathematics over many hands.
If two games are otherwise similar, knowing the blackjack payout gives you important information about the rules you're playing under.
Check Whether the Dealer Stands on Soft 17
Look for S17 or H17 in the table rules.
- S17: Dealer stands on soft 17.
- H17: Dealer hits on soft 17.
These rules produce different mathematical outcomes, which is one reason a strategy chart designed for S17 should not automatically be used for an H17 game.
The calculator on this page is configured for S17.
Check the Doubling Rules
Doubling can be an important part of basic strategy.
Some tables allow you to double on any initial two cards, while others restrict when doubling is permitted.
The calculator assumes double on any two initial cards.
Check Double After Split
DAS, or double after split, allows a player to double a hand after splitting a pair.
This creates additional playing options and can affect the mathematics of the game.
The calculator assumes DAS is allowed.
Consider Surrender and Side Bets Separately
Some blackjack tables offer surrender, while others do not.
This calculator does not provide surrender recommendations, so its results should not be treated as a complete strategy for a table where surrender is available.
Side bets should also be considered separately from the main blackjack wager. Our blackjack side bets guide explains how these additional wagers work and why they are separate from the basic-strategy calculation.
Frequently Asked Questions
What is blackjack basic strategy?
Blackjack basic strategy is a mathematically derived set of decisions that recommends whether to hit, stand, double or split based on your hand, the dealer's upcard and the rules of the game.
Does blackjack basic strategy guarantee a win?
No. Basic strategy does not guarantee that an individual hand or session will win. It is designed to help you make the mathematically preferred decision consistently over the long run.
What does the blackjack calculator do?
The calculator uses your two cards and the dealer's upcard to identify the recommended basic-strategy decision. It is configured for a 6-deck game with S17, 3:2 blackjack, double on any two initial cards, DAS and no surrender.
Should I always split Aces?
Under the rules used by this calculator, basic strategy recommends splitting Aces. This turns the starting pair into two separate hands rather than playing the Aces together.
Should I always split 8s?
Under the rules used by this calculator, basic strategy recommends splitting 8s rather than playing them as a hard 16. Different rules can affect some strategy decisions, so make sure the strategy you're using matches the table.
Should I split 10s?
Generally, no. Two 10-value cards make a starting total of 20, which is already a strong hand. Splitting gives up that strong starting total and creates two separate hands.
Is 3:2 blackjack better than 6:5?
A 3:2 blackjack payout gives a larger return on a natural blackjack than a 6:5 payout.
For example, a $10 blackjack produces a $15 profit at 3:2 compared with a $12 profit at 6:5, assuming the same wager. The payout is therefore an important rule to check when comparing blackjack tables.
Does basic strategy work for online blackjack?
Yes. Basic strategy can be used for online blackjack when the strategy matches the rules of the particular game. Check the number of decks, blackjack payout, dealer rule and doubling or splitting restrictions before relying on a strategy chart or calculator.
Does basic strategy work for live dealer blackjack?
Yes. The same basic-strategy principles apply to live dealer blackjack. The important consideration is the rules of the individual table, not whether the cards are dealt by software or a live dealer.
Is blackjack basic strategy the same as card counting?
No. Basic strategy uses your current hand, the dealer's upcard and the game rules to determine the recommended play.
Card counting is a separate technique that attempts to estimate how the composition of the remaining cards affects the odds. You do not need to count cards to learn or use basic strategy.
Can the calculator account for every blackjack rule?
No. The calculator is built around a specific ruleset: 6 decks, S17, 3:2 blackjack, double on any two cards, DAS and no surrender.
Other table rules can change some strategy decisions, so check the actual rules of the game before using the calculator's recommendation.
Does basic strategy remove the house edge?
No. Basic strategy is designed to reduce the house edge, not eliminate it. Even when you make the mathematically preferred decision, you can still lose individual hands or experience losing sessions.
Final Takeaway
Basic strategy isn't about predicting which card will appear or trying to guarantee the outcome of a hand.
It's about consistently making the mathematically preferred decision based on the cards in front of you.
- Check the table rules.
- Pay attention to the dealer's upcard.
- Learn the difference between hard, soft and paired hands.
- Use the calculator when you're unsure.
- Practice making the decision before checking the answer.
- Remember that correct strategy does not guarantee individual wins.
The more familiar the common situations become, the easier it is to make the right decision without having to stop and think about every hand.
Play Responsibly
This calculator is an educational tool based on the rules stated on this page. It does not predict individual outcomes, guarantee winnings or eliminate the house edge.
Always check the rules of the specific blackjack game before relying on a strategy recommendation, and never gamble more than you can afford to lose.
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