Calculators / Implied probability
Implied probability calculator
Every price implies a probability. Add every side of a market and we strip out the bookmaker's margin to show the "true" probability each side is really worth.
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| Selection | Odds | Implied | True (no vig) |
|---|
Market overround
How it works
Implied probability is one divided by the decimal price. Add every side of a two-way or three-way market and you get the "book" — anything above 100% is the bookmaker's built-in margin.
To find the "true" probability of any one side, divide its implied probability by the total book. That normalizes everything back down to 100%, stripping the vig out proportionally.
Worked example
A two-way market at 1.67 / 2.30.
| 1.67 | 60.0% |
| 2.30 | 43.5% |
| Book | 103.5% |
| True probability, 1.67 side | 58.0% |