Blackjack True Count Converter
Convert running count to true count for optimal betting
Formula:True Count = Running Count ÷ Decks Remaining
True Count Calculator
Enter running count and deck information
Deck Status
2.0 decks left67% dealt
True Count
+3.0
Large bet
Running Count
+6
Decks Left
2.0
Penetration
67%
Player Edge
+1.00%
Strategy Adjustments at This Count
Take insuranceStand 16 vs 10Stand 12 vs 3
Practice Scenarios
Test your true count calculations
Quick Answer
Key concepts at a glance
True count = Running count ÷ Decks remaining. With RC +12 and 3 decks left, TC = +4. True count normalizes the running count to account for how many cards are left. This is essential for accurate betting decisions. TC +1 means roughly break-even, TC +2 gives about 0.5% player edge, TC +3+ signals maximum betting.
Key Facts About True Count
Essential knowledge for card counters
- True count = Running count / Decks remaining
- Each +1 true count adds approximately 0.5% to player edge
- TC +2 or higher typically justifies increasing bets
- Estimating decks remaining is a skill that requires practice
- Half-deck accuracy in deck estimation is usually sufficient
- Deep penetration (more cards dealt) makes true count more reliable
- TC is more important than RC for betting decisions
Frequently Asked Questions
Common questions about true count
Why do I need true count instead of running count?
Running count alone does not tell you the strength of your advantage. A +10 running count means very different things with 5 decks remaining vs 1 deck remaining. True count normalizes this by dividing by decks remaining, giving you a standardized measure of advantage that can be used for consistent betting decisions.
How do I estimate decks remaining?
Watch the discard tray. Each deck is roughly 2 inches thick. With a 6-deck shoe, if the discard tray shows 2 inches (1 deck), you have 5 decks remaining. Practice at home with decks until you can estimate within half a deck. Some counters use the number of rounds played instead.
What true count should I increase my bet at?
Most betting ramps start increasing at TC +1 or +2. A common approach: TC ≤ 0 = minimum bet, TC +1 = 2 units, TC +2 = 4 units, TC +3 = 8 units, TC +4+ = maximum spread. The exact ramp depends on your bankroll, risk tolerance, and casino heat considerations.
How does penetration affect true count accuracy?
Deeper penetration (more cards dealt before shuffle) increases true count reliability and profitability. With 50% penetration, you rarely see high true counts. With 80% penetration, you see more extreme counts and can bet with more confidence. Seek games with at least 75% penetration.
Should I use true count for playing deviations?
Yes, many basic strategy plays change based on true count. These are called "index plays" or "deviations." Common ones: Insurance at TC +3, stand on 16 vs 10 at TC 0, stand on 12 vs 3 at TC +2. Learning the "Illustrious 18" deviations adds significant value.
How this works
Calculations follow the published mathematics of the game — combinatorics for cards, probability theory for dice, and expected-value accounting for wagers. Results are verified against independent references (primarily Wizard of Odds). No calculation here is an opinion or recommendation; it is arithmetic applied to the rules of the game.
What this tool can’t do
When to consult a professional
This tool computes probability and expected value. It is not a betting system and cannot predict the outcome of any individual wager. If gambling is causing problems for you or someone you know, call the National Problem Gambling Helpline at 1-800-GAMBLER.
Sources
- [1]Wizard of Odds — Michael Shackleford, ASAIndustrywizardofodds.comAccessed Apr 21, 2026
Actuary; widely cited casino-game probability reference. Used for house-edge and EV verification.
- [2]National Council on Problem GamblingOfficial sourcencpgambling.orgAccessed Apr 21, 2026
Responsible-gambling guidance and 1-800-GAMBLER helpline.
Joseph OrdunaFounder & Software Engineer
Full-stack software engineer specializing in embedded systems, web architecture, and AI/ML. Founder of Practical Web Tools. Built the gesture-controlled drone IP acquired by KD Interactive (Aura Drone, sold on Amazon).