Probability Calculator
Convert odds to implied probability percentages and find value
Easily convert betting odds into implied probability. Whether you're working with decimal, fractional, or American odds, this tool helps you understand the true chance of your bet winning.
Understanding Probability in Betting
Key Concepts
- 🎯 Implied Probability: What the bookmaker thinks the chance is
- 💰 Bookmaker Margin: Built-in profit for the bookmaker (typically 2-10%)
- ⚖️ Fair Odds: What odds would be without the bookmaker's margin
- 💎 Value Betting: When you think the true probability is higher than implied
Example Calculation
Odds: 2.50 (decimal)
Implied Probability: 1 ÷ 2.50 = 40%
This means: Bookmaker thinks there's a 40% chance
Value opportunity: If you think chance is 45%+, it's a value bet
Probability Calculator – FAQ
Implied probability is the percentage chance of an outcome happening, based on the odds. It shows how likely a bookmaker thinks an event is to occur.
It uses a formula specific to the odds format you choose. For example, decimal odds are converted using 1 ÷ decimal odds × 100.
The calculator supports decimal, fractional, and American odds. Just select your preferred format from the dropdown to convert instantly.
Yes. If your estimated probability of an outcome is higher than the implied probability from the odds, there may be a value betting opportunity.
Knowing the implied probability helps you make smarter bets, avoid poor value, and evaluate whether the odds truly reflect the likelihood of an outcome.
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