How to use this betting tool
- Enter each value using the units shown.
- Check that the market and settlement assumptions match your bet.
- Select Calculate and review the main result and supporting figures.
#181 · Odds Probability & Margin Tool
Odds Confidence Interval Calculator
Use this odds confidence interval calculator to test a clearly defined betting scenario with transparent arithmetic. Values stay in your browser.
Calculator
Scenario inputscount
count
%
odds
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What this tool calculates
This calculator evaluates odds confidence interval from the supplied figures. It separates the headline answer from useful checks so that stake, return, probability, or settlement terms are not confused.
Wilson score interval for a binomial proportion; implied probability = 100 / decimal odds.
Displayed values are rounded; calculations use unrounded numbers. Operator rules and local deductions may change actual settlement.
Worked example
The prefilled values provide a reproducible example. Press Calculate to evaluate them with the same logic used for any values you enter.
| Check | Meaning |
|---|---|
| Inputs | Use the example values shown in the calculator. |
| Output | The result card shows the computed settlement and supporting totals. |
Tips and limitations
- Confirm whether odds include returned stake.
- Keep market definitions consistent across every input.
- Treat estimates and past performance as descriptive, not predictive.
FAQ
How is odds confidence interval calculated?
Wilson score interval for a binomial proportion; implied probability = 100 / decimal odds.
Which odds format should I enter?
Enter decimal odds wherever an odds field appears; decimal odds include the returned stake.
Does the result predict a winning bet?
No. It calculates the stated scenario from your inputs and does not forecast an event.
How does rounding affect the result?
Calculations retain full browser precision and round only displayed values. Small stake differences can remain.
Can bookmaker settlement rules change the result?
Yes. Voids, commissions, dead heats, overtime and market definitions may vary, so check the operator rules.
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Calculation notes
| Item | Rule |
|---|---|
| Precision | Round only for display |
| Privacy | Runs in this browser |
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