Implied Probability Calculator

Every betting line is a probability statement in disguise. Odds of -150 imply the book thinks (after its margin) the outcome hits 60% of the time; +200 implies 33.3%. This calculator converts any odds format, whether American, decimal, or fractional, into its implied win probability, and works in reverse if you would rather start from a percentage.

Implied probability is the fastest gut-check in betting: compare the number the book is charging you with what you believe the true probability is. If your estimate is higher than the implied figure, the bet has positive expected value. Add your stake to see the potential win and total payout at those odds.