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Implied Probability & Bookmaker Overround (Vig) Calculator

Extract true fair probabilities from betting odds and compute the bookmaker vigorish / overround margin in 2-way and 3-way sports markets.

Implied Probability & Bookmaker Overround Calculator

Extract true mathematical probabilities and compute the exact bookmaker vig (margin).

Team A / Outcome 1 Odds

Team B / Outcome 2 Odds

Outcome 1 Fair Probability

50.0%

Outcome 2 Fair Probability

50.0%

Bookmaker Margin (Overround)

2.56%

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✨ Key Capabilities

Calculates fair "no-vig" true probabilities for each outcome
Identifies the exact bookmaker vigorish / juice percentage
Shows how much edge the house takes on the market
Supports 2-way match betting markets
Dynamic real-time calculation

📖 How to Use the Implied Probability & Bookmaker Overround (Vig) Calculator

Enter the decimal odds for Outcome 1 and Outcome 2.
View the fair un-juiced probabilities and the bookmaker's overround margin.

❓ Frequently Asked Questions

What is bookmaker overround (vig)?

The overround is the percentage total above 100% created by the bookmaker's odds, representing their built-in profit margin regardless of outcome.

Why should bettors remove the vig?

Removing the vig reveals the bookmaker's true estimate of each team winning, which is essential for finding +EV (positive expected value) bets.

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