- Pick an Odds Format and enter odds for each outcome of the market.
- Read the output. Vig %, per-outcome fair probability, and total implied probability.
No Vig Calculator
A no-vig calculator that finds the fair odds behind any sportsbook line. Strip out the bookmaker's commission to see the true probability of each outcome.
How to Use This Calculator
What is a no vig calculator?
A no vig calculator strips the sportsbook's commission out of a betting line to expose the underlying fair odds. The resulting numbers represent the market's consensus probability for each outcome, with the bookmaker's margin removed.
Every sportsbook line includes a built-in commission called the vig (short for vigorish), also called the juice or hold. The vig is how sportsbooks profit regardless of which side wins. On a typical -110 / -110 moneyline, the vig is about 4.5%.
Formula
For a two-way market: convert each side to implied probability, sum the two (the sum exceeds 100% because of the vig), then divide each implied probability by the sum.
\[
\begin{aligned}
\text{No-Vig Probability} &= \dfrac{\strut \text{Implied Probability}}{\strut \text{Sum of Implied Probabilities}}
\end{aligned}
\]
Worked example
Both sides of a moneyline are listed at -110.
\[
\begin{aligned}
\text{Each side} &= \dfrac{\strut 110}{\strut 210} = 52.38\% \\[6pt]
\text{Sum} &= 104.76\% \\[6pt]
\text{No-Vig (each side)} &= \dfrac{\strut 52.38\%}{\strut 104.76\%} = 50.00\%
\end{aligned}
\]
With the vig removed, the no-vig fair odds say each side has exactly a 50% chance of winning.
Why no-vig fair odds matter for sports bettors
The no-vig price is the sportsbook's actual estimate of probability. It is the benchmark every +EV bet is measured against. When one sportsbook offers a price better than the no-vig fair odds at another book, that price is, by definition, a positive expected value bet.
Sharp sportsbooks like Pinnacle and Circa run on tight margins. Their no-vig prices are widely treated as the most accurate available proxy for true probability. The DarkHorse Odds +EV Bet Finder uses this comparison automatically, surfacing bets where one book's offered price beats the market consensus.
To understand the underlying math, read our Implied Probability guide. The closely related Devig Calculator and Vig Calculator handle the same math from different angles.
Common no-vig calculator mistakes
- Treating the no-vig price as personal probability. The no-vig price is the market consensus, not a private opinion. A bettor with a model that disagrees should use that model's probability for EV calculations and the no-vig fair odds as a sanity check.
- Using a recreational book for the benchmark. No-vig pricing from a soft book reflects soft pricing. Use sharp books (Pinnacle, Circa) as the reference for the most accurate estimate.
- Ignoring three-way markets. Soccer and other markets with a draw outcome require all three prices. Calculating no-vig from only two sides distorts the probabilities.
- Forgetting that vig varies by market. NFL moneylines often have lower vig than player props. The same +EV opportunity is more meaningful in a low-vig market.
Frequently Asked Questions
What is a no vig calculator?
A no vig calculator removes the sportsbook's commission from a betting line to show the fair odds behind it. The output represents the market's true estimate of each outcome's probability without the bookmaker's margin baked in. It is the standard reference tool for evaluating whether a bet is positive expected value.
How do you calculate no vig odds?
Convert each side of the market to implied probability, sum the probabilities (the sum will exceed 100% because of the vig), then divide each side by the sum. The result is the no-vig probability for each outcome.
\[
\begin{aligned}
\text{Each side} \ (-110) &= \dfrac{\strut 110}{\strut 210} = 52.38\% \\[6pt]
\text{Sum} &= 104.76\% \\[6pt]
\text{No-Vig (each side)} &= \dfrac{\strut 52.38\%}{\strut 104.76\%} = 50.00\%
\end{aligned}
\]
That is the no-vig fair odds for a -110 / -110 market.
What is the difference between no-vig and devigging?
No-vig pricing and devigging refer to the same operation. Both describe removing the sportsbook's commission to expose the underlying fair odds. Sharp bettors typically say devig; recreational sites typically say no-vig. The math is identical.
Is the no-vig price the same as the true probability?
No. The no-vig price is the market's best estimate of true probability, not the actual true probability. Sharp books with tight margins produce no-vig prices that are widely accepted as the closest available proxy. A bettor with a stronger model may disagree with the consensus.
Why is no vig pricing useful?
It tells the bettor what a fair line looks like. Any time another sportsbook offers a price better than the no-vig fair odds at a sharp book, the better price is positive expected value by definition. No vig calculators are the foundation of every +EV betting workflow.
How is no vig different from low hold?
Hold (or vig) is the commission baked into a line. No-vig pricing removes that commission to show the fair price. Low hold refers to a market where the commission is unusually small, which is a separate concept. A market can have low hold and still produce a meaningful no-vig calculation.
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