UnjuicedVig Calculator
See how much pricing margin is embedded in a two-sided sportsbook market.
Two-way market
Embedded price margin
Vig
4.76%
Book percentage
104.76%
Outcome 1 implied
52.38%
Outcome 2 implied
52.38%
Lower is better for the bettor. A negative number means the best prices create an arbitrage opportunity.
How to use the Vig Calculator
Vig is the pricing cost built into a sportsbook market. Measuring it helps you compare the same market across books and understand your break-even hurdle.
- 1Enter the odds for both outcomes.
- 2Review the market's total implied probability and vig.
- 3Compare normalized prices with available sportsbook offers.
Formula and assumptions
Market vig = total implied probability - 100%. Normalized fair probabilities divide each side by the total.
The calculator evaluates the entered snapshot. Prices can move and different market-making models may allocate vig unevenly.
Vig calculator FAQ
Answers about this free vig calculator, sports betting odds, payouts, and the math behind each result.
Why do -110 and -110 include vig?
Each side implies 52.38%, so together they total 104.76%. The amount above 100% is the market margin.
Is lower vig better for bettors?
Generally, yes. Lower vig reduces the win rate needed to break even over a large sample of similar wagers.