Implied Probability Calculator

Convert decimal, fractional, American, and probability odds instantly. Use this free implied probability calculator to understand the percentage chance behind any betting market and compare prices more clearly.

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Converted values
Implied Probability
Decimal Odds
Fractional Odds
American Odds

What implied probability means

Implied probability is the percentage chance suggested by a set of odds. For example, decimal odds of 2.00 imply a 50% chance. This helps bettors and prediction market users understand what a price really means.

How to calculate implied probability

The simplest version is with decimal odds:

  • Implied Probability = 100 / Decimal Odds
  • 2.00 decimal = 50.00%
  • 1.91 decimal = 52.36%
  • 4.00 decimal = 25.00%

Why implied probability matters

Implied probability helps you compare bookmaker prices, estimate how likely an outcome is, and decide whether a market looks overpriced or underpriced. It is especially useful for exchange betting and prediction markets where users often think in percentages.