Devig Calculator
Paste both sides of any sportsbook market and we'll devig the price — stripping the book's juice to reveal the fair, no-vig odds and true probability for each outcome.
What "devig" means
Devigging (or "de-juicing") a market means removing the sportsbook's built-in margin so you can see what the price would be if the book wasn't taking a cut. The result is the true probability the market is pricing.
We use the multiplicative method — the standard among sharp bettors. Each side's implied probability is divided by the sum of both sides' implied probabilities. It's accurate for moneylines, spreads, totals, and most player props.
Devig workflow for serious bettors
- Pull the two-sided price from a sharp book (Pinnacle, Circa) — they set the closest-to-true line.
- Devig it to find the fair price for each side.
- Compare that fair price to what your sportsbook is offering.
- When your book pays more than fair, you have an edge — that's a +EV bet.
Worked example — devigging a player prop
- 1Pinnacle posts Patrick Mahomes Over 274.5 yards at +105Pa = 100 / (105 + 100) = 48.78%
- 2Same prop, Under 274.5 at −115Pb = 115 / (115 + 100) = 53.49%
- 3Sum of implied probabilities: 102.27%Pinnacle is taking 2.27% vig
- 4Devigged Over probability: 48.78 / 102.27 = 47.70%
- 5Fair Over price: +110
Frequently asked questions
What does it mean to devig odds?+
Devigging removes the sportsbook's built-in margin from a two-way market so you can see what the price would be if the book took no cut. The result is the true probability the market is pricing.
What's the difference between devig and no-vig?+
They're the same thing — different name for the same calculation. 'Devig' is the verb (the action), 'no-vig' is the result (the price after the vig is removed).
Why is the multiplicative method standard?+
It's simple, fast, and accurate for the two-way markets most retail bettors play. Each side's implied probability is divided by the sum of both. Pinnacle, Bet Labs, and most quant shops default to it for moneylines, spreads, totals, and over/under props.
When should I not use multiplicative devig?+
Avoid it for heavy favorites where one side is shorter than about −1000 — the small implied-probability gap distorts the result. Use power devig or Shin instead. Also avoid for three-way markets like soccer 1X2.
How accurate is a devigged price?+
As accurate as the book you devig from. Devigging Pinnacle gets you within 1% of true. Devigging DraftKings or FanDuel gets you close to their internal estimate, which is biased toward the public side they expect more action on.
Want this done automatically?
The Bet Analyzer devigs the live market for you on every analysis — no copy-paste between books.