Free betting calculator
No-vig probability calculator
Remove a two-way sportsbook margin by normalizing both sides’ implied probabilities to 100%.
Enter positive odds with a plus sign or number, and negative odds with a minus sign.
Sportsbook hold4.76%
Fair probability, side 150.00%
Fair probability, side 250.00%
A calculated edge is an estimate, not a guarantee. Your result is only as reliable as the probability input.
What the result means
Use the number as an estimate
Sportsbook prices usually imply probabilities totaling more than 100%. That excess is the hold. Dividing each side by the combined implied probability produces a simple proportional no-vig estimate.
FormulaFair probability = side implied probability ÷ total implied probability
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