No-vig fair odds calculator
This tool is a no-vig fair odds calculator: paste the two prices from any moneyline, spread, or total and it instantly returns the fair line for both sides. You also see each side's market-implied win probability (vig removed), plus the exact vig the book baked into the market, no signup required.
What is the vig?
The vig (also called juice or the hold) is the margin a sportsbook builds into its odds. It is why a coin-flip market is priced at -110 on both sides instead of +100. Those two -110 prices imply about 52.4% each, which adds up to roughly 104.8%, not 100%. That extra 4.8% is the vig, the book's guaranteed cut. A no-vig calculator strips it out so you can see the true, fair price underneath.
What is a no-vig (fair) line?
A no-vig line is what the odds would be if the book took no margin at all, so the two sides add up to exactly 100%. It represents the market's honest estimate of each outcome's probability. Compare any book's actual price to the no-vig fair price and you instantly see whether you are getting value or paying the house.
Devig calculator: how to devig odds
Devigging means removing the sportsbook's built-in fee (the vig) from the posted odds to reveal the market's true fair probability for each side. That is exactly what this devig calculator does automatically: enter both prices and it strips the margin, showing the fair win chance and fair line.
Sharp bettors devig a sharp book's price first to establish the fair line, then shop every other book for a number that beats it.
How to remove the vig
- Convert each side's odds to its implied probability (implied % = 100 / decimal odds).
- Add the two implied probabilities together. The total will be over 100%; that overround is the vig.
- Divide each side's implied probability by that total. The results now add to 100% and are the no-vig fair probabilities.
- Convert each fair probability back to odds to get the fair line. This tool does all of it as you type.
Why no-vig odds matter
The no-vig fair odds are your benchmark. If one book prices a side at +120 while the fair odds are +105, you are getting more than the outcome is worth, which is a positive expected value (+EV) bet. Beating the fair line consistently is the entire foundation of profitable betting, and it is why line shopping and devigging go hand in hand.
The Wise Guy Team way
Devig the sharpest book to get the fair line, then shop every other book for a price that beats it. We automate both: the fair line and the best available number across regulated US books, plus documented plays every day.
Frequently asked questions
What does no-vig mean?
No-vig means the sportsbook margin has been removed so the two sides of a market add up to exactly 100%. It reveals the true fair probability and fair odds behind the price.
How do you calculate no-vig odds?
Convert each side to implied probability, add them (the total over 100% is the vig), then divide each by that total so they sum to 100%. Convert those fair probabilities back to odds.
What is a normal vig?
A standard two-way market like -110/-110 carries about 4.5 to 4.8% vig. Sharper books run tighter (2 to 3%); softer books and parlays run much higher.
How does no-vig help me find +EV bets?
The no-vig fair odds are the break-even benchmark. Any price better than the fair odds is a positive expected value bet over the long run.
Does this work for three-way markets?
This tool devigs two-way markets (moneylines, spreads, totals). For three-way markets like soccer with a draw, the same method applies across all three implied probabilities.
21+. For entertainment and educational purposes, not financial advice. If gambling stops being fun, take a break. 1-800-GAMBLER.