Hold Calculator
Calculate the bookmaker's margin (hold) and implied probabilities from betting odds. Our free hold calculator helps you understand how much advantage the bookmaker has built into the odds. Enter odds for all outcomes to see the margin and implied probabilities. No registration required.
Use the free calculator below to calculate bookmaker margin.
Hold Calculator
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How It Works
The hold (or margin) is the bookmaker's built-in advantage. It's calculated by summing all implied probabilities - if they exceed 100%, the difference is the hold.
How Hold is Calculated:
Calculate implied probabilities for each outcome:
Implied Prob1 = 1 / Odds1
Implied Prob2 = 1 / Odds2
Total Implied Prob = Implied Prob1 + Implied Prob2 (+ Implied Prob3)
Calculate hold (margin):
Hold = (Total Implied Prob - 1) × 100%
Example:
If you have odds of 2.10 and 1.90:
- Implied Prob1 = 1/2.10 = 0.476 (47.6%)
- Implied Prob2 = 1/1.90 = 0.526 (52.6%)
- Total = 1.002 (100.2%)
- Hold = (1.002 - 1) × 100% = 0.2%
Understanding Hold:
- Lower hold = better value for bettors
- Typical holds range from 2-5% for major sports
- Holds above 5% are considered high
- The hold represents the bookmaker's guaranteed profit margin
Hold Calculator Examples
Real-world examples of calculating bookmaker margin from betting odds.
Example 1: Low Margin Market
Example 2: 3-Way Market
Example 3: High Margin Market
How to Use the Hold Calculator
Enter Odds
Enter the decimal odds for each outcome in the market. For 2-way markets, enter two odds. For 3-way markets, click "+ Add Third Outcome" and enter three odds.
View Results
The calculator automatically calculates the bookmaker hold (margin) and implied probabilities for each outcome in real-time.
Analyze Margin
Check the hold percentage. Lower holds mean better value. Compare holds across different bookmakers to find the best odds.
How the Hold Calculator Works
The hold calculator measures the bookmaker's built-in advantage by calculating how much the implied probabilities exceed 100%.
Formula:
Implied Probability = 1 / Decimal Odds
Total Implied Probability = Sum of all Implied Probabilities
Hold (Margin) = (Total Implied Probability - 1) × 100%
Understanding Hold:
- Hold = 0%: Fair odds (no bookmaker advantage) - extremely rare
- Hold = 2-4%: Good value (typical for major sports)
- Hold = 5-7%: Average to high margin
- Hold > 7%: Very high margin - poor value for bettors
Why Hold Matters:
The hold represents the bookmaker's guaranteed profit margin. Lower holds mean better odds and more value for bettors. Comparing holds helps you find the best bookmakers.
Example: Odds of 2.10 and 1.90 create a 0.2% hold, while odds of 1.85 and 1.95 create a 5.2% hold - significantly worse value.
Frequently Asked Questions
Hold (also called margin or vigorish) is the bookmaker's built-in profit margin. It's the difference between the sum of implied probabilities and 100%.
Holds of 2-4% are considered good for major sports. Holds above 5% are high and reduce value for bettors. Lower holds mean better odds.
Bookmakers build a hold into their odds to guarantee profit regardless of the outcome. This is how they make money in the long term.
Yes, click "+ Add Third Outcome" to add a third set of odds for 3-way markets like soccer match results (Win/Draw/Lose).
Compare holds across different bookmakers. Bookmakers with lower holds offer better value. Use this information to choose where to place your bets.
Yes, our hold calculator is completely free to use. No registration required, no hidden fees.