Vig Calculator
margin = Σ 1/oᵢ − 1
Enter the odds for every outcome in one market, for example home, draw and away.
Questions about the vig calculator
What is vig or juice?
The bookmaker's built-in margin. Add up the implied probabilities of every outcome: anything above 100% is the margin. A two-way market at 1.90 / 1.90 adds up to 105.3%, a 5.3% overround.
How are no-vig fair odds worked out?
Divide each outcome's implied probability by the total, so they add up to 100%, then turn each back into odds with 1 ÷ probability.
These tools do the maths only. They can't predict results, and no betting system guarantees a profit.
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