How to use this betting tool
- Enter the requested values using the units shown.
- Choose any settlement option that matches your market.
- Select Calculate and review the formula, assumptions, and supporting figures.
#086 · Bet Tracking and Performance Tool
Expected vs Actual Wins Calculator
Compare an observed win count with the count implied by a stated per-bet win probability, including a binomial standard-score check.
Calculator
Enter market valuesbets
%
wins
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What this tool calculates
Compare an observed win count with the count implied by a stated per-bet win probability, including a binomial standard-score check.
Expected wins = bets × expected probability. z = (actual wins − expected wins) ÷ √[bets × p × (1 − p)].
Results are informational estimates. Confirm final grading, limits, and promotional terms with the operator.
Worked example
Over 100 bets at an expected 55% win rate, 60 actual wins are 5 above the expected 55; the z-score uses the binomial standard deviation.
| Check | Meaning |
|---|---|
| Inputs | Use values from one consistent market or settled event. |
| Output | The result follows the formula and assumptions stated on this page. |
Tips and limitations
The simple binomial model assumes independent bets with the same win probability. Pushes, varying odds, correlated bets and changing selection quality require a richer model.
Keep stakes proportionate to what you can afford to lose. No calculator removes betting risk.
FAQ
What inputs does the Expected vs Actual Wins Calculator require?
The calculator uses only the values displayed in its input card. Each value is validated before a result is shown.
When are the results rounded?
The calculation keeps JavaScript numeric precision internally and rounds only the displayed figures to practical decimal places.
Does this result include bookmaker-specific settlement rules?
No. The stated assumptions are applied, while voids, promotions, deductions, taxes, and operator-specific rules must be checked separately.
Can this calculation predict whether a bet will win?
No. It evaluates the entered numbers or settled score; it does not predict an event or provide a betting signal.
Why might my bookmaker show a different figure?
Differences can come from odds changes, currency rounding, push or void treatment, commission, bonus terms, or a different calculation convention.
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Calculation reference
| Item | Definition |
|---|---|
| Primary output | Actual minus expected wins |
| Method | Expected wins = bets × expected probability. z = (actual wins − expected wins) ÷ √[bets × p × (1 − p)]. |
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