How to use this betting tool
- Enter the values shown in the calculator.
- Choose the market or settlement option when available.
- Select Calculate and review the formula, result, and stated assumptions.
#071 · Odds Probability & Margin Tool
Three-Way Market Hold Calculator
Measure the bookmaker hold in a three-outcome market and normalize home, draw, and away prices into proportional no-vig probabilities.
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Enter assumptionsdecimal odds
decimal odds
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What this tool calculates
The calculator adds the implied probabilities of all three mutually exclusive outcomes. The amount above 100% is the market hold, then proportional normalization removes that margin.
Hold = (1/Home + 1/Draw + 1/Away) × 100 − 100. Fair probability = outcome implied probability ÷ implied total.
Results are informational. Confirm final grading, limits, deductions, and promotional terms with the operator.
Worked example
At 2.40, 3.30 and 3.10, the implied probabilities total about 104.23%, so the three-way hold is about 4.23%.
| Check | Meaning |
|---|---|
| Inputs | Use the example defaults above |
| Output | Calculated live when you press Calculate |
Tips and limitations
- Use prices and probabilities from the same market and settlement basis.
- Do not treat rounded display values as extra precision.
- Check operator-specific rules before placing or grading a wager.
FAQ
How is three-way market hold calculated?
Hold = (1/Home + 1/Draw + 1/Away) × 100 − 100. Fair probability = outcome implied probability ÷ implied total.
What odds or probability assumptions does this result use?
The calculation uses only the values entered on this page and the assumptions stated beside the result.
When can the bookmaker settlement differ?
Operator rules can change treatment of voids, dead heats, shortened events, bonuses, commissions, or special settlements.
How does the calculator handle rounding?
Full-precision numbers are used internally; rounding is applied only to the displayed result.
Can this result predict whether a bet will win?
No. It explains betting math or settlement scenarios and does not forecast a future event.
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Calculation notes
| Item | Method |
|---|---|
| Precision | Full precision internally |
| Privacy | Runs locally in your browser |
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