Remove the proportional bookmaker margin from a two-way or three-way team-sports market and convert quoted decimal odds into fair probabilities and odds.
Remove the proportional bookmaker margin from a two-way or three-way team-sports market and convert quoted decimal odds into fair probabilities and odds.
Calculations run locally in your browser. No betting data is transmitted.
Odds of 1.91 and 1.91 imply 104.71% in total, an overround of about 4.71%. Proportional normalization assigns 50% to each side and fair odds of 2.00.
Enter every mutually exclusive outcome in the market. A two-way overtime-included market and a three-way regulation-time market are not interchangeable.
This informational tool does not recommend a wager or guarantee a result. Confirm operator terms and local rules.
Quoted probability = 1 ÷ odds. Overround = sum of quoted probabilities − 100%. Proportional fair probability = quoted probability ÷ total quoted probability.
No. Every value is entered and calculated locally in your browser; no odds or account data is fetched.
Operators may apply different market definitions, rounding, commission, void, overtime, or jurisdiction-specific rules.
Calculations use JavaScript numeric precision and values are rounded only for display, normally to two decimal places.
No. The output describes the entered numbers and assumptions; it does not predict an event or guarantee a return.
Use calculations to understand arithmetic and assumptions. Set limits, never chase losses, and seek support if betting stops being recreational.
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