Implied Probability Calculator

Convert betting odds to implied probability.

Implied probability (%) 40

Formula: American/decimal odds → implied probability

Step-by-step with your numbers:

1. Values used:

2. Odds value = 150

4. Implied probability = 40%

Did we solve your problem today?

Implied probability is the win chance baked into betting odds.

The math behind it

American +odds: 100/(odds+100). −odds: |odds|/(|odds|+100). Decimal: 1/odds.

+150 American → 40% implied probability.

Why don't they add to 100%?

The bookmaker's margin ('vig') makes the implied probabilities sum above 100%.