Calculators

Fair Odds Calculator

Bookmakers don't offer fair prices. Every market they set includes a built-in margin that tilts the odds in their favour. The fair odds calculator removes that margin, showing you the fair odds for each selection.

2-Way Fair Odds Calculator

Strip the bookmaker margin from any market to reveal the true, no-vig odds and implied probabilities.

Odds 1

Odds 2

Results

Enter odds above to see fair odds and bookmaker margin

What is a Fair Odds Calculator?

A no-vig fair odds calculator removes the built-in margin (vig or juice) from a bookmaker or sharp sportsbook odds and returns the fair odds, sometimes called true odds, and true win probability for each outcome.

Bookmakers price markets so that the combined implied probabilities of all outcomes exceed 100%. That excess they charge is the vig, and that’s their guaranteed profit margin.

Say you're looking at an NBA game between the Lakers and the Celtics. Your bookmaker has them both priced at 1.90. That means both teams have an equal chance of winning. If it were truly 50/50, the odds for both sides would be 2.00. The difference between 1.90 and 2.00 is the vig, and it means every bet you place at 1.90 is working against you.

Types of Fair Odds Calculators

Betsniper offers two types of fair odds calculators:

A fair odds 2-way calculator for markets with two outcomes. This covers moneylines, head-to-head bets, point spreads, and other markets where draws aren’t an option. You only have to enter the odds for both sides, and the calculator returns the fair odds and true win probability for each.

A fair odds 3-way calculator for markets with three outcomes. This is most commonly used in football (soccer), where the three outcomes are home win, draw, and away win. You simply enter the odds for all three sides, and the calculator takes out the vig of all three simultaneously, then it returns the fair odds probability and true probability.

How to Use the Fair Odds Calculator

Using a fair odds calculator is straightforward. All you have to do is enter the decimal odds for each outcome into the calculator, and it returns the fair odds and fair win probability for each side instantly.

For a 2-way market, you need two odds. For a 3-way market, you need three. That's it.

2-Way Example: NBA Moneyline

Let's say you want to bet on the Golden State Warriors vs. the Boston Celtics. Your bookmaker has Golden State priced at 1.80 and 2.10 for the Celtics.

Step 1: Enter both odds into the 2-way calculator.

Step 2: The calculator returns the following:

Team

Bookmaker Odds

Fair Odds

Fair Win Probability

Golden State Warriors

1.80

1.86

53.85%

Boston Celtics

2.10

2.17

46.15%

Total

103.17% (3.17% vig)

100%

The bookmaker is charging a 3.17% vig on this market. If you find the Celtics priced at 2.18 or higher anywhere, that's a +EV bet worth taking.

3-Way Example: Premier League 1X2

Now let's say you're looking at a Premier League match between Liverpool and Chelsea. Your bookmaker has it priced at 2.10 odds if Liverpool wins, 3.60 odds for a Chelsea win, and 3.40 if the game ends in a draw.

Step 1: Enter all three odds into the 3-way calculator.

Step 2: The calculator returns the following:

Outcome

Bookmaker Odds

Fair Odds

Fair Win Probability

Liverpool win

2.10

2.20

45.43%

Draw

3.40

3.56

28.06%

Chelsea win

3.60

3.77

26.50%

Total

104.81% (4.81% vig)

100%

The bookmaker is charging a vig of 4.81% across this market.

Frequently Asked Questions

What are no-vig fair odds

No-vig fair odds are true odds for each outcome once the bookmaker’s margin has been removed. For example, if you're looking at a match where both sides are priced at 1.90, the implied probability is 52.63% per side, totalling 105.26%. After removing the vig, each side’s win probability drops back to 50%, with fair odds of 2.00.

How is vig calculated?

Divide 1 by the decimal odds for each outcome to get the implied probability, then add them together. Whatever the total exceeds 100% by is the vig. For a market priced at 1.80 / 2.10, the implied probabilities are 55.56% and 47.62%, totalling 103.18%. The vig is 3.18%.

Why use the no-vig calculator?

It shows you the fair price of a bet so you can tell whether a bookmaker's odds are actually worth taking. If a bookmaker is offering above the fair odds, the bet has positive EV. If they're below, you're paying more than you should. A no-vig fair odds calculator is the fastest way to find your edge before placing any bet.