No-Vig Calculator
Enter the two sides of any sportsbook market — moneyline, spread, total, prop — and instantly see the no-vig (fair) odds and true implied probability for each outcome.
American format, e.g. -110 or +120
The opposing side from the same book
The vig is the sportsbook's built-in margin. The lower the vig, the closer the posted price is to fair — which is why sharp books like Pinnacle typically run 2–3% holds on major markets.
How no-vig odds work
Every sportsbook bakes a margin — the vig (also called juice or hold) — into both sides of a market. Add the two implied probabilities together and they'll total more than 100%. That excess is the book's edge.
A no-vig calculator strips that margin out. The formula:
fair_prob(A) = implied_prob(A) / (implied_prob(A) + implied_prob(B))The result is the true probability the market is pricing — and the corresponding fair American odds. Compare that price to what your sportsbook is offering and you can see, in seconds, whether a bet has positive expected value.
Worked example
- 1Side A −110 → 52.38% implied100 / (110 + 100)
- 2Side B −110 → 52.38% impliedSame math, same price
- 3Sum of both sides: 104.76%The 4.76% over 100% is the vig
- 4Fair prob for A: 52.38 / 104.76 = 50.00%Divide each side by the total
- 5Fair American odds: +100 / +100A perfectly fair coin flip
When to use this
- Line shopping. Devig a sharp book's price, then check if your favorite sportsbook is offering better than fair.
- Evaluating a boost. Compare a boosted price to the no-vig market price to see if it's actual edge or marketing dressing.
- Sizing bets. Use the true probability as your input for Kelly criterion or any staking model.
- Grading parlays. Devig each leg before multiplying — that's the only way to spot a +EV parlay.
Frequently asked questions
What is a no-vig calculator?+
A no-vig calculator (also called no-juice or devig) removes the sportsbook's built-in margin from a two-way market and returns the fair odds — the price that reflects the true probability of each outcome. It's the fastest way to see the real number behind any line.
How does the no-vig odds calculator work?+
Enter the American odds for both sides of a market. The calculator converts each price to implied probability, sums them (the total exceeds 100% because of the vig), then divides each side by that total to get the vig-free fair probability — and converts that back to American odds.
How is no-vig calculated?+
Convert each side's American odds to implied probability, add them together, then divide each side by the total. The result is the fair no-vig probability, which converts back to fair American odds. The standard formula is multiplicative devigging.
Is this no-vig calculator free?+
Yes — completely free, no signup, no daily limit. Use it on moneylines, spreads, totals, player props, or any two-sided market on any sportsbook.
What does 'remove the vig' mean?+
Every sportsbook bakes a margin (the vig, juice, or hold) into both sides of a market, so the two implied probabilities add to more than 100%. Removing the vig means proportionally stripping that margin out so the two sides sum to exactly 100% — leaving the fair price.
Why use a no-vig calculator?+
Comparing a sportsbook's price to the no-vig price tells you whether you're getting fair value. If your book's price is better than the no-vig price from a sharp market, you have positive expected value — a real edge.
Which sportsbook should I devig?+
Use the sharpest book available — Pinnacle and Circa are the gold standard because their low 2–3% hold means their prices sit closest to the true probability. DraftKings, FanDuel, and BetMGM run wider 5–7% holds, so devigging them reflects book balancing more than market consensus.
What's the difference between no-vig and devig calculators?+
They're the same tool with different names. 'No-vig', 'no-juice', 'devig', and 'fair odds' calculators all do identical math: remove the sportsbook's margin from a two-way market to return the vig-free price.
Does this work for player props and three-way markets?+
For two-sided player props (over/under at the same line, yes/no) the multiplicative method this calculator uses is the standard and works perfectly. For three-way markets like soccer 1X2 or same-game parlay legs, more advanced methods like Shin or power adjustment can be more accurate.
How do I use no-vig odds to find +EV bets?+
Devig the sharpest market you can find. Compare that fair price to your own sportsbook. If your book pays more than fair, you have positive expected value. Plug both numbers into our EV calculator to see the exact edge percentage.
Skip the math entirely
Our Bet Analyzer pulls live no-vig prices from the major US books automatically. Paste a sportsbook screenshot or describe your bet and you'll get the fair price, your edge, and a plain-English A–F grade in seconds.