No-Vig Calculator + Live No-Vig Odds on Every Game
Enter both sides of a moneyline, spread or total in American odds. The calculator removes the vig and shows each side’s no-vig probability, no-vig odds and the book’s hold.
No-vig calculator
| Side | Price | Implied | No-vig % | No-vig odds |
|---|---|---|---|---|
| Side A | −150 | 60.00% | 58.40% | −140 |
| Side B | +130 | 43.48% | 41.60% | +140 |
- Hold (vig)
- 3.48%
- Implied total
- 103.48%
Enter a price to see its expected value against this no-vig price.
How to use it
- Enter both prices for the same market from the same book — for example, Chiefs −150 and Bills +130.
- Pick a method. Power is the default: it was the most accurate on sharp moneylines. For a US-league moneyline from a retail book, Multiplicative tested better, and on spreads and totals near −110 every method agrees. The evidence is in which de-vig method is most accurate.
- Read the no-vig odds. Any price better than these, at any book, is positive expected value against this no-vig price.
- Optionally paste a price from another book into “Test a price” to see its expected value directly.
The math
implied = 100 / (odds + 100) for + odds · |odds| / (|odds| + 100) for − odds
hold = implied A + implied B − 1 · no-vig A (multiplicative) = implied A / (implied A + implied B)
EV % = no-vig probability × decimal odds − 1
The power method instead finds the exponent k with implied Ak + implied Bk = 1. Shin solves a small model of insider trading; in a two-way market it gives the same answer as Additive. All four use the same code that computes the no-vig price on the live boards. For the background, read what no-vig odds are.
A no-vig probability also prices line shopping: the worst line vs best line calculator weights the gap between two books’ prices by it, to show what the worse number costs per bet. On a spread or total it prices half a point too: the half point calculator fits a key-number model to it to show what buying from −3 to −2.5 is worth.
Skip the typing: every game on the boards shows a live no-vig price built from several sharp sources, and the +EV page lists the prices currently beating it.
Frequently asked questions
What does a no-vig calculator do?
It takes both prices of a two-way market, works out the probability each one implies, removes the bookmaker’s margin and returns the no-vig probability and no-vig odds for each side, plus the margin (hold) the book was charging.
Which method should I pick?
It depends on where the prices come from. Power tested most accurate on sharp moneylines, such as Pinnacle’s, and on soccer 1X2. For a US-league moneyline from a retail book, multiplicative did better. On spreads and totals near even money every method gives almost the same answer. If a bet only looks +EV under one method, treat it with caution.
Can I use prices from two different books?
You can, but the result is no longer one book’s no-vig price. Two different books can even add up to under 100%, which is an arbitrage. For a no-vig estimate, use both sides from the same sharp book.
What does a negative hold mean?
The two prices imply less than 100% in total, so backing both sides at the right stakes returns more than you put in. That is an arbitrage, usually across two books; use the arbitrage calculator to size it.
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