Convert your running count into a true count by adjusting for decks remaining. This tool is built for blackjack education, Hi-Lo true count practice, and clear casino math.
Enter your running count and estimated decks remaining. The calculator updates automatically.
Rounded True Count
+2
Estimate decks remaining from decks dealt or cards dealt, then send the estimate to the main calculator.
The true count formula adjusts the running count for the number of decks remaining in the blackjack shoe.
Example: running count +8 ÷ 4 decks remaining = true count +2.
Many Hi-Lo teaching systems use a rough estimate that each true count point above zero shifts player expectation by about 0.5%.
This is only a teaching shortcut. Real blackjack advantage depends on table rules, penetration, bet spread, payout rules, surrender, dealer hits or stands on soft 17, counting accuracy, bankroll, and mistakes.
The running count tells you whether more high cards or low cards have appeared. But the running count alone is not enough in shoe games because the same running count means different things depending on how many decks are left.
A running count of +6 with six decks remaining is not very strong. A running count of +6 with two decks remaining is much stronger. The true count fixes this by dividing the running count by decks remaining.
The running count is the raw count you keep as cards are dealt. The true count is the adjusted count after you divide by decks remaining. In multi-deck blackjack, true count is usually more useful because it shows the density of high cards compared with the amount of shoe left.
True count conversion is most commonly used with balanced counting systems like Hi-Lo, Hi-Opt I, Omega II, and Wong Halves. Unbalanced systems, such as KO Count, are often handled differently because they are designed around key counts instead of normal true count conversion.
Card counting and true count conversion are mathematical concepts, not guarantees of winning. Blackjack still involves variance, bankroll risk, casino rules, and human error. Never gamble with money you cannot afford to lose.