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繁體中文Implied Probability Explained
Implied probability turns odds into a percentage chance, which is the key to judging value. This guide explains it with hypothetical examples only.
- It is the percentage chance an outcome must have for its odds to be fair.
- For decimal odds, divide 1 by the price.
- The extra over 100% is the bookmaker's margin, built into the odds across all outcomes.
What it is
Implied probability is the chance an outcome must have for its odds to be fair. Every price corresponds to a probability.
Converting odds
For decimal odds, implied probability = 1 ÷ the price.
Why it adds over 100%
Add up the implied probabilities of all outcomes and they exceed 100% — the extra is the bookmaker's margin.
Finding value
If your own estimate of an outcome's chance is higher than the implied probability, the bet has value. This is the foundation of disciplined betting — see how odds work.
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🔞 18+ only. Examples are hypothetical and for explanation only — they are not betting advice or real odds. Please gamble responsibly.
FAQ
It is the percentage chance an outcome must have for its odds to be fair. For decimal odds it equals 1 divided by the price.
For decimal odds, divide 1 by the price. For example 1 ÷ 2.50 = 0.40, an implied probability of 40%.
The extra over 100% is the bookmaker's margin, built into the odds across all outcomes.
Last updated: 2026-06-15