Kelly Criterion Calculator
How to Use These Calculators Together
- Enter the bookmaker's odds (decimal or fractional) into the Probability Calculator to see the implied probability.
- Use your own judgement to estimate the horse's true win probability.
- Enter your estimated probability, odds, and bankroll into the Kelly Calculator to get the optimal stake.
Example: Odds 3.0 = 33.3% implied. If you believe the horse has a 40% chance, enter 40 into the Kelly calculator.