Implied Probability Calculator
Implied probability is what a bookmaker's price says about the chance of an outcome, before any margin is stripped out. Every other calculator here builds on this one number.
How it works
Divide 100 by the decimal odds to get the percentage chance the market is pricing in. Bookmaker odds include a built-in margin, so implied probabilities across a full market usually add up to slightly more than 100%.
Worked example: Odds of 2.50 imply a 100 / 2.50 = 40% chance of winning.
FAQ
Does implied probability already include the bookmaker's margin?
Yes. It's read directly from the odds as quoted, so the margin is baked in. Use the Bookmaker Margin Calculator to see that margin on its own.
What's the difference between implied and break-even probability?
For a single bet they're the same number - both describe the win rate needed to break even at that price over many identical bets.
Related tools
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