About Blackjack Calculator
A free, independent blackjack strategy tool, and how its advice is worked out.
Last updated:
Blackjack Calculator tells you the best basic strategy move for any hand, and explains the numbers behind every answer. It is free to use, needs no sign-up and never handles real money.
What the site is
The site is built around one question: given the dealer's card and your hand, what is the best move? The blackjack calculator answers it for the table rules you choose. The strategy trainer lets you test yourself, the play page lets you try hands with virtual chips, and the strategy guides explain the reasoning behind the hands people argue about most.
It is an independent project. It is not connected to any casino, betting company or game publisher.
How the advice is worked out
The advice is the move with the best average result, worked out exactly for each hand (hit, stand, double, split and surrender). It is not copied from another chart and it is not a simulation.
- The model. An infinite deck, a dealer who checks for blackjack, and the rule options you can switch in the calculator: whether the dealer hits soft 17, whether surrender is allowed and whether you can double after a split.
- Checks. The calculator's chart was compared cell by cell with the exact results for all eight combinations of those rule options, and every cell agreed. The figures quoted in the guides are taken straight from the same calculations.
- Limits. Real games with a few decks differ slightly from an infinite deck, and the best play for a specific hand can change a little when the exact cards are known. The pages say so where it matters. Basic strategy lowers the house edge but cannot remove it or predict any single hand.
The GTA Online pages
The GTA Online blackjack calculator and the GTA Online blackjack strategy guide use the rules shown on the game's own rules screens. They are fan-made and are not affiliated with or endorsed by Rockstar Games. Grand Theft Auto and GTA Online are trademarks of their owners.
What the site is not
- It is not a gambling site. You cannot deposit, bet or win real money here, and the chips on the play page have no cash value.
- It is not a betting tip service, and nothing on it guarantees a win.
- It is for adults. Gamble responsibly: BeGambleAware.org and GamCare offer free, confidential help.
Keeping it accurate
Each guide shows the date it was last updated. When a rule, a number or an explanation changes, the page is corrected and the date is updated. Your own data stays in your browser. See the privacy policy for exactly what is stored.
Check any hand in the calculator
Choose the dealer's card and your cards to see the best move for your table rules.