Quick answer: to remove the vig, turn each price into an implied probability, add them up, then divide each probability by the total. At -110 on both sides, each side implies 52.38%, the book adds up to 104.76%, and the no-vig chance is 50% each, so the fair odds are +100 (evens). The bookmaker keeps about 4.55% of the money staked. Use the no vig calculator below for any 2-way or 3-way market in American, decimal or fractional odds, and the implied probability calculator to check your edge on a single price.
| # | Odds | Implied | No-vig | Fair odds |
|---|
Enter every outcome of one market from one bookmaker (2 to 10 outcomes). Fair odds are an estimate: they remove the margin, not the bookmaker’s opinion.
Edge = your win chance × decimal odds − 1. It is only as good as the win chance you enter.
How to use the no vig calculator
- Pick the odds format your sportsbook shows: American (-110), decimal (1.91) or fractional (10/11). Odds you have already typed are converted when you switch.
- Enter the price of every outcome in one market from the same bookmaker. Two outcomes for a moneyline, spread or total; three for a football 1X2 (home, draw, away). Tap + to add up to 10 outcomes, for example a race or a tournament winner market.
- Read the screen. It shows the vig (the share of all stakes the bookmaker keeps), the book percentage, and for each outcome its implied chance, its no-vig chance and its fair odds.
- Check a price in the second calculator. Enter the odds another bookmaker offers, tap FAIR to copy the no-vig chance of outcome 1, and see whether the bet has a positive edge.
What does vig mean in betting?
The vig (short for vigorish) is the fee a bookmaker charges for taking your bet. It is also called the juice, the cut, the take or the margin. You never see it as a separate charge: it is built into the odds, so the implied chances of all outcomes add up to more than 100%. The amount over 100% is the overround, and it is where the bookmaker’s profit comes from.
The classic example is a point spread at -110 on both sides. You stake 110 to win 100, whichever side you pick. If one bettor backs each side for 110, the sportsbook takes in 220 and pays 210 to the winner, keeping 10. That 10 out of 220 is the 4.55% vig.
How to calculate the vig
- Convert each price to an implied probability (see the formulas in the implied probability section below).
- Add them up. The total is the book percentage. Anything over 100% is the overround.
- Work out the vig on stakes: vig = 1 − 1 ÷ book. This is the share of all money staked that the bookmaker keeps if bets are balanced, and it is the number the calculator shows in large digits.
| Market | Implied chances | Book | Overround | Vig (hold) |
|---|---|---|---|---|
| -110 / -110 | 52.38% + 52.38% | 104.76% | 4.76% | 4.55% |
| -150 / +130 | 60.00% + 43.48% | 103.48% | 3.48% | 3.36% |
| 2.10 / 3.40 / 3.60 (1X2) | 47.62% + 29.41% + 27.78% | 104.81% | 4.81% | 4.59% |
Overround or vig: why two numbers?
Both describe the same margin from different angles. The overround (4.76% at -110/-110) is how far the book goes over 100%. The vig or hold (4.55%) is the share of the total money staked that the bookmaker keeps. Some sites quote one, some the other, which is why you see both 4.55% and 4.76% for a -110 line. The calculator shows both.
How to remove the vig and get no-vig odds
No-vig odds (also called fair odds or “devigged” odds) are the prices you would get if the bookmaker took no margin. To find them you have to decide how the margin is spread across the outcomes. The calculator offers three common methods:
- Proportional (multiplicative): divide each implied chance by the book total. This is the standard method and the default. At -150 / +130 it gives 57.98% and 42.02%, so the fair odds are -138 and +138.
- Additive: take the same amount off every outcome: the overround divided by the number of outcomes. It is simple, but on markets with a big longshot it can push the longshot’s chance to zero or below, and the calculator then tells you to switch method.
- Power: raise every implied chance to the same power k, chosen so the chances add up to exactly 100%. It takes a little more off longshots than favourites: in the 3-way example below, the away chance comes out at 26.18% instead of 26.50%.
On a balanced line like -110/-110 all three methods give the same answer: 50% each, or +100. They only differ when the prices are uneven, and the gap is usually small on major markets.
3-way no vig example (football 1X2)
Say a match is priced 2.10 home, 3.40 draw, 3.60 away. The implied chances are 47.62%, 29.41% and 27.78%, a book of 104.81%. Removing the vig proportionally gives fair chances of 45.43%, 28.06% and 26.50%, or fair odds of 2.20, 3.56 and 3.77. If another bookmaker offers 2.30 on the home win, that price is above the fair 2.20. Tap the 1X2 button in the calculator to load this example.
| Outcome | Odds | Implied chance | No-vig chance | Fair odds |
|---|---|---|---|---|
| Home | 2.10 (+110) | 47.62% | 45.43% | 2.20 (+120) |
| Draw | 3.40 (+240) | 29.41% | 28.06% | 3.56 (+256) |
| Away | 3.60 (+260) | 27.78% | 26.50% | 3.77 (+277) |
Implied probability calculator: the formulas
Implied probability is the chance of winning that a price suggests, vig included. It is also your break-even rate: at -110 you have to win 52.38% of your bets just to break even. These are the formulas the implied probability calculator uses:
| Odds type | Formula | Example |
|---|---|---|
| American, minus (−A) | A ÷ (A + 100) | −110 → 110 ÷ 210 = 52.38% |
| American, plus (+A) | 100 ÷ (A + 100) | +400 → 100 ÷ 500 = 20% |
| Decimal d | 1 ÷ d | 2.50 → 40% |
| Fractional a/b | b ÷ (a + b) | 6/4 → 4 ÷ 10 = 40% |
To convert the other way, from a chance back to odds, divide 1 by the chance for decimal odds (50% → 2.00), then use our odds calculator to turn it into American or fractional odds and work out returns on a stake.
Using no-vig odds to find value bets
Once you have a fair price, compare it with what other bookmakers offer. Expected value (EV) per unit staked = your win chance × decimal odds − 1. Using the -150 / +130 market above, the underdog’s no-vig chance is 42.02%. If a second bookmaker offers +150 (2.50) on the same side, the EV is 0.4202 × 2.50 − 1 = +5.04%, or about 5 per 100 staked over the long run. At +130 (2.30) the same sum gives −3.36%.
Two cautions. First, no-vig odds from one bookmaker are only that bookmaker’s opinion with the margin taken out; they are not the true chance. Prices from a large, low-margin market are a better guide than a niche market. Second, positive EV is a long-run average: single bets still lose often, so stake sizes should stay small. Our sports betting tips cover bankroll basics.
More betting calculators
- Odds calculator and converter: switch between decimal, fractional and American odds and see returns on any stake.
- Arbitrage betting calculator: when the best odds at different bookmakers add up to less than 100%, split your stake so every outcome returns the same.
- Kelly criterion calculator: once the fair odds show you have an edge, work out how much of your bankroll to stake.
- Matched betting calculator: lay stakes and guaranteed profit for qualifying bets and free bets at a betting exchange.
- Parlay calculator: combined odds and payouts for US-style parlays, with pushes and round robins.
- Accumulator calculator: accas, each-way accas, Yankees and Lucky 15s. Remember the vig multiplies with every leg you add.
- Wagering requirement calculator: what a bonus is really worth before you claim it.
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No vig calculator FAQs
What does vig mean in betting?
Vig, short for vigorish, is the fee a bookmaker charges for taking a bet. It is built into the odds, so the implied chances of all outcomes add up to more than 100%. At -110 on both sides the vig is about 4.55% of all money staked.
What does juice mean in betting?
Juice is another name for the vig: the bookmaker’s built-in margin. The lower the juice, the better for you: a line of -105 on both sides keeps about 2.38% of stakes, against 4.55% at -110.
How do you calculate no-vig odds?
Convert every price in the market to an implied probability, add them up, and divide each probability by the total. Then turn each fair probability back into odds with 1 ÷ probability. At -150 / +130 that gives fair odds of -138 / +138.
What is the vig on -110 odds?
With -110 on both sides, each side implies 52.38% and the book is 104.76%. The bookmaker keeps about 4.55% of the money staked (an overround of 4.76%), and the fair odds without vig are +100 on each side.
How do I convert American odds to implied probability?
For minus odds, divide the number by itself plus 100: -110 → 110 ÷ 210 = 52.38%. For plus odds, divide 100 by the number plus 100: +400 → 100 ÷ 500 = 20%.
Does the calculator work for 3-way markets?
Yes. Enter the home, draw and away prices as outcomes 1 to 3, or tap the 1X2 button for an example. You can add up to 10 outcomes for markets such as tournament winners.
Are no-vig odds the true probability?
No. They are the bookmaker’s own view with the margin removed, so they are only as accurate as that bookmaker’s prices. Treat them as an estimate, bet only what you can afford to lose, and see our responsible gambling page if betting stops being fun.
How we checked this
Each formula and figure on this page is checked against two independent sources, and every worked example was recalculated with the calculator above:
- Vig definition and its other names (juice, cut, take, margin): Wikipedia (Vigorish) and Topend Sports.
- Implied probability formulas for American, decimal and fractional odds, and -110 = 52.38%: Wikipedia (Odds) and Topend Sports.
- Book percentage, overround and proportional vig removal, and the -110/-110 vig of 4.55%: Wikipedia (Mathematics of bookmaking) and SharpAPI.
- Additive and power methods: OddsGuy and the footix documentation.
Figures last checked: 9 October 2026.
