No-Vig Calculator
A free no-vig calculator for 2-way and 3-way markets. Enter each side in American or decimal odds and it strips out the vig — the bookmaker's built-in margin — to show the vig %, the true implied probability, and the fair, no-vig odds for every outcome. Add the draw price for a 3-way market.
How the no-vig math works
Every price a sportsbook posts includes a hidden commission. Because of it, the implied probabilities of a market's sides always add up to more than 100%. Removing the vig means redistributing that overage back across the real outcomes.
Take a tennis match at −130 / +110. The favorite's implied probability is 56.5% and the underdog's is 47.6% — a total of 104.1%. That 4.1% is the vig. Divide each side by 104.1% and the fair probabilities become 54.3% and 45.7%, which price out to roughly −119 / +119.
Why the starting line matters
De-vigging only produces a true probability if the line you feed it is sharp. That is why serious bettors devig Pinnacle specifically: it takes the largest bets in the world, does not limit winners, and runs a thin margin, so its prices are the closest thing the market has to the truth. Once you have that fair number, compare it to softer US books to spot +EV bets. The no-vig probability is also the input the Kelly criterion calculator needs to size the bet, so the two tools work as a pair.
3-way no-vig calculator: soccer, draw markets, and regulation-time hockey
The method is identical no matter how many outcomes there are. For a soccer match, enter home, draw, and away in the three fields — the calculator sums all three implied probabilities and divides each by the total. The same applies to any market with a draw, such as NHL 60-minute lines or 3-way handicaps. Moneylines, spreads, and totals are 2-way; leave the draw field blank for those.
Example: a soccer match priced +120 / +240 / +230 (home / draw / away) carries implied probabilities of 45.5%, 29.4%, and 30.3% — a total of 105.2%, so the vig is 5.2%. Dividing each by 105.2% gives fair probabilities of 43.2% / 28.0% / 28.8%, which price out to roughly +131 / +258 / +247. A 3-way market usually carries more vig than a 2-way one, which is why devigging it matters more.
Vig calculator in decimal or American odds
Use the toggle above the fields to enter decimal odds (1.77 / 2.10) or American odds (−130 / +110). The vig % is the same either way, and the fair odds come back in whichever format you chose. To see what the vig costs you in dollars rather than percent, the hold calculator reports the book's hold on the same market.
Frequently asked questions
How do you calculate no-vig odds?
Convert each side of the market to an implied probability (1 divided by the decimal odds), add the sides together — the sum will exceed 100%, and that overage is the vig — then divide each side's probability by that total. The result is the fair, no-vig probability for each outcome, which you convert back into fair odds.
What does the no-vig calculator do with a 3-way market?
For a 3-way market such as soccer (home / draw / away), enter all three prices. The calculator sums all three implied probabilities and divides each by the total, exactly the same as a 2-way market. The total overage is still the vig, and each fair probability is that side's share of a clean 100%.
Can I use this vig calculator with decimal odds?
Yes. Switch the odds format toggle to Decimal and enter prices such as 1.77 and 2.10. The calculator converts each price to an implied probability (1 divided by the decimal odds), reports the vig %, and returns the fair no-vig odds in the same format you entered. Switching the toggle converts any odds already in the fields.
Why is the no-vig line more accurate than the posted odds?
The posted odds bake in the bookmaker's commission, so their implied probabilities always add up to more than 100%. Removing the vig redistributes the phantom probability back across the real outcomes, giving you the market's true estimate — especially reliable when you start from a sharp, low-margin book like Pinnacle.
Devig every market automatically.
Iron Marker removes the vig from the sharp line and compares it to every major US sportsbook in real time, surfacing only the bets that beat fair value — with the Kelly stake already calculated. $39/mo, 7-day free trial.
Start free trialIron Marker is an analytics tool, not a sportsbook, and this calculator is educational — not betting or financial advice. Must be 21+. Problem gambling? Call 1-800-GAMBLER.