No-vig fair odds calculator
Remove the market margin from both sides to estimate fair probabilities and prices.
−104 / +104
Fair price −104 / +104 after removing 4.5% hold. Fair chances 51.1% and 48.9%.
- Side A fair
- −104
- Side B fair
- +104
- Fair chance A
- 51.08%
- Fair chance B
- 48.92%
- Overround
- 4.71%
Use both sides of one market at the same book, like an over and its under.
How to use the no-vig fair odds calculator
A no-vig calculation removes the sportsbook margin and normalizes both sides of a market to 100%. The result is a cleaner estimate of the market's fair price.
- 1Enter the best available odds for both sides of the market.
- 2Let the calculator remove the combined overround.
- 3Compare the fair prices with the odds available to bet.
Formula and assumptions
Fair probability = side implied probability / total implied probability across all sides.
This proportional method distributes the margin evenly by implied probability. Other de-vig methods can produce slightly different fair prices.
The math in full, with worked examples: How to remove the vig: no-vig fair odds explained
Questions
Answers about this free no-vig fair odds calculator, sports betting odds, payouts, and the math behind each result.
- No-vig odds are estimated fair prices after removing the sportsbook's built-in margin from every side of a market.
- Not after normalization. Properly calculated no-vig probabilities across a complete market add up to 100%.