Free Tool
Implied Probability Calculator
Convert American or decimal odds into an implied win probability in an instant. Add the opposing side to remove the bookmaker's margin and reveal the fair, no-vig probability — completely free, no account needed.
Implied Probability Calculator
Enter one side to see its implied probability. Add the opposing side to remove the bookmaker margin and reveal the fair, no-vig probability.
The book's built-in margin is 4.76%. The no-vig numbers are the fair probabilities once that margin is removed.
Informational tool only — not betting advice. Implied probability includes the bookmaker margin and is not a guaranteed outcome. 18+. Bet responsibly at licensed operators.
Enter the odds
Type the odds for the outcome you're pricing. Use the toggle to switch between American (-110) and decimal (1.91) formats.
Add the other side
Enter the opposing side's odds so the calculator can measure the bookmaker's margin (the vig) baked into the market.
Read the fair price
See each side's implied probability, the book's hold, and the fair no-vig probabilities so you know the true break-even line.