Blackjack Card Counting Bet Sizing Calculator
Skilled blackjack players size bets according to their statistical edge, which rises with the true count. Enter your bankroll, true count, and edge-per-count assumption to see a suggested bet size using fractional Kelly sizing — for educational and strategy-study purposes only.
About this calculator
Calculate a recommended bet size using the Kelly-based spread method from the true count, bankroll, and table rules edge.
Frequently Asked Questions
What is true count in card counting?
True count is the running count divided by the number of decks remaining in the shoe, giving a normalized measure of favorability regardless of shoe size.
What is fractional Kelly betting?
Fractional Kelly sizes bets as a fraction (like half) of the full Kelly criterion amount to reduce bankroll volatility while still capturing most long-term growth.
Is this calculator for real-money gambling?
This tool is intended for studying betting theory and bankroll math, not as gambling advice. Casino play carries financial risk and rules vary by venue.