Implied Probability Calculator
Every price hides a probability. Enter odds to see the chance of winning they imply.
What implied probability means
Implied probability is the chance of an outcome that the odds suggest. For decimal odds it is simply 1 divided by the odds: 2.50 implies 40%. For American minus odds, -150 implies 150 / (150 + 100) = 60%. For plus odds, +150 implies 100 / (150 + 100) = 40%.
Because bookmakers add a margin, the implied chances of both sides usually add up to a bit more than 100%. Use the no-vig calculator to see the fair chances.
FAQ
How do you calculate implied probability from American odds?
For minus odds: odds / (odds + 100), using the number without the minus sign. For plus odds: 100 / (odds + 100).
Why do both sides add up to more than 100%?
That extra is the bookmaker margin, also called the vig or juice. It is how sportsbooks profit over time.
Is implied probability the real chance of winning?
No. It is what the price suggests after the margin. The true chance can be higher or lower, which is why people compare it with their own estimate.