No-vig calculator
Strip the vig. Find the fair price.
Last updated 2026-07-03
Enter every side of a market in American odds (two sides for moneylines and totals, three for soccer 1X2). You get the fair probabilities, fair odds, and the book's hold percentage.
How it works
Each side's odds convert to an implied probability. Summed, they exceed 100%; the excess is the bookmaker's margin. Dividing each probability by the total (proportional devigging) yields no-vig probabilities that sum to exactly 100%. Converting those back to odds gives the fair price.
Example: -110 / -110 implies 52.38% + 52.38% = 104.76%. Devigged: 50% each side, fair odds +100, hold 4.76%.
Do this programmatically
TheOddsAPI precomputes vig-removed fair odds from a consensus of 30-50 books including Pinnacle, which is stronger than devigging one book in isolation:
curl "https://api.theoddsapi.com/intelligence/fair-odds?sport_key=basketball_nba" \ -H "x-api-key: YOUR_API_KEY"
Business tier. See the value bets guide for the full workflow.
Questions
Is proportional devigging the only method?
No. Proportional is standard and what this tool uses. Alternatives (Shin, power, additive) adjust for favorite-longshot bias and matter most at extreme prices. For mainline markets the differences are small.
Which book should I devig for the truest probability?
The sharpest one available: Pinnacle. Their low margin and high limits make their devigged line the best single-book estimate of true probability. Better still is a consensus across many books anchored on sharp ones, which is what /intelligence/fair-odds serves.
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