No-vig calculator
Enter both sides. See the price without the bookmaker margin. Free, no sign-in.
Your market
INSTANTEnter every outcome from the same market and sportsbook.
| Outcome | Probability | Fair odds |
|---|---|---|
| Side A | 50.00% | +100 |
| Side B | 50.00% | +100 |
Implied probabilities total 104.76% before removing the margin.
Proportional method: each implied probability is divided by the market total. These are market-based estimates, not predictions.
How to remove the vig from betting odds
Enter the whole market
- Choose American or decimal odds.
- Enter both opposing sides, such as −110 and −110. Add a third outcome for a three-way market with a draw.
- Read the no-vig odds and probabilities. All outcomes must be mutually exclusive and cover the whole market.
Use prices from the same sportsbook at the same time. For a two-way market that refunds ties or pushes, these probabilities are conditional on a decisive result.
The proportional no-vig formula
Convert each price to decimal odds, then calculate its implied probability: p = 1 ÷ decimal odds. Add those probabilities to get the market total. Divide each probability by that total to normalize the market to 100%.
At −110 / −110, both sides imply 52.38%. The total is 104.76%, so the overround is 4.76 percentage points. After normalization, each side is 50%, equivalent to +100 American or 2.00 decimal odds.
Overround is a pricing measure. It is not the sportsbook's realized profit or a guarantee of its hold.
No-vig odds examples
| Market A / B | No-vig A / B | Overround |
|---|---|---|
| −110 / −110 | +100 / +100 | 4.76% |
| −200 / +170 | −180 / +180 | 3.70% |
Fair odds are estimates under the proportional method. Use a fair probability in the expected value calculator to compare it with an available price. Need another display format? Use the American and decimal odds converter. To compare NFL spreads at different prices, use the NFL line comparison calculator.
No-vig calculator FAQs
What does no-vig mean?
Vig, juice and bookmaker margin describe the markup in betting prices. A no-vig calculation removes that markup under an explicit method. VigFox uses proportional normalization, dividing each implied probability by the sum across all outcomes.
Is a de-vig calculator the same as a no-vig calculator?
Yes. De-vig, no-vig and juice removal describe removing bookmaker margin from odds. Different methods can produce different estimates. VigFox uses the proportional, or multiplicative, method and displays both fair-odds estimates and normalized probabilities.
Are no-vig odds the true chance of winning?
No. The result depends on the market prices and how the margin is allocated. The proportional method assumes margin is applied in proportion to implied probability. It cannot establish the actual chance of an outcome.
Can I use a draw or three-way market?
Yes. Add the third outcome and enter all three prices. Do not omit a draw from a three-way market. A two-way draw-no-bet market is a different settlement contract.
Why is the margin negative?
A negative overround means the entered implied probabilities total less than 100%. Check that you entered every outcome from the same market. This calculator normalizes an underround too; it does not check execution, availability or settlement rules.
Is the no-vig calculator free?
Yes. No account is required. Calculations run in your browser. Fair American odds are displayed rounded to whole numbers; probabilities use the unrounded calculation.