Vig calculator
Web onlySee how much pricing margin is embedded in a two-sided sportsbook market.
4.76%
At −110 / −110 the prices add up to 104.76%: 4.76% over a fair 100%.
- Book percentage
- 104.76%
- Side A implied
- 52.38%
- Side B implied
- 52.38%
Vig is the margin over a fair 100%; hold is the share of the money the book keeps.
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.
The math in full, with worked examples: How to remove the vig: no-vig fair odds explained
Questions
Answers about this free vig calculator, sports betting odds, payouts, and the math behind each result.
- Each side implies 52.38%, so together they total 104.76%. The amount above 100% is the market margin.
- Generally, yes. Lower vig reduces the win rate needed to break even over a large sample of similar wagers.