Betting Calculators
Implied Probability Calculator
Calculate the true probability implied by bookmaker odds. Enter odds for multiple outcomes to see the total probability and bookmaker margin.
How to Use This Calculator
- Select your odds format (Decimal, Fractional, or American)
- Enter odds for at least two outcomes (e.g., Team A and Team B)
- Add more outcomes if needed (e.g., for draw in soccer)
- See implied probability for each outcome, total probability, and bookmaker margin
A total implied probability above 100% indicates the bookmaker’s margin.
Formula
Implied Probability from Decimal Odds: Probability = (1 / Decimal Odds) x 100%
Bookmaker Margin: Margin = Total Implied Probability - 100%
No-Vig (Fair) Probability: Fair Probability = Implied Probability / Total Implied Probability
Frequently Asked Questions
What is implied probability?
Implied probability is the likelihood of an outcome as suggested by the odds. It includes the bookmaker’s margin, so the total always exceeds 100%.
What is the bookmaker margin?
The bookmaker margin (or vig/juice) is the difference between the total implied probabilities and 100%. It represents the bookmaker’s built-in profit.
How do I find value bets?
If you believe the true probability of an outcome is higher than the implied probability from the odds, that bet has positive expected value.