Odds & Implied Probability Calculator
Convert decimal odds into implied probability to see what the bookmaker actually believes.
Enter odds in decimal (European) format.
The event probability according to the bookmaker, margin included.
How it works
Implied probability is the probability that a given odds reflects from the bookmaker's perspective. The formula is straightforward for decimal odds: probability = 1 / odds. For example, odds of 2.00 imply a 50 % probability, odds of 4.00 imply 25 %, and odds of 1.50 imply roughly 66.67 %.
Why does it matter? Because comparing your own probability estimate against the bookmaker's is the very foundation of value betting. If you believe a team has a 60 % chance to win but the bookmaker's odds only imply 50 %, you've spotted a value bet. In the long run, betting only when your estimated probability exceeds the implied probability is the only path to profitability.
Heads up: implied probability includes the bookmaker's margin (overround). The sum of implied probabilities across all outcomes of a match always exceeds 100 %. To get the bookmaker's true estimated probability, you need to strip that margin, but for a quick check, implied probability remains the go-to metric.