What Is a No-Vig Line?
Sportsbook odds always include a hidden fee called the vig (or juice). It's why both sides of a coin-flip game are priced at -110 instead of even money: the extra juice is the book's cut. Because of it, the implied probabilities of a market always add up to more than 100%.
A no-vig line (or “de-vigged” line) removes that margin so the two sides sum back to 100%. What's left is the market's honest opinion of each outcome's probability.
How to remove the vig
The math is simple. Convert each side of the market to its implied probability, add them up to get the total (say 104.8% on a -110 / -110 game), then divide each side by that total. Two -110 prices become 50% each — a fair line of even money (+100) on both sides.
You don't have to do it by hand. Our no-vig & EV calculator strips the margin from any two-sided price, and the hold & margin calculator does it for full 2-way or 3-way markets while showing how big the book's cut was.
Why the no-vig line matters
The no-vig line is your benchmark. It's the closest thing the market gives you to a fair probability, which makes it the number every edge is measured against:
- It tells you the true price to beat when you're shopping for value.
- It lets you compare the number you bet to the closing line on an apples-to-apples basis.
- It's the cleanest way to check whether a bet has positive expected value.
No-vig line vs. your own model
The de-vigged market line is a strong baseline, but it's still just the market's opinion. The edge comes from having an independent estimate — a true line built from data — and betting when your number and the fair number disagree. The no-vig line tells you the fair price; the model tells you when the book is wrong about it.