No-Vig Fair Odds Calculator — Remove Juice & Find True Odds
Remove the sportsbook's margin to find the true fair odds and the book's hold. Supports two-way and three-way markets in American, decimal, or fractional odds.
Odds format
Saved for all betting calculators
The home side in a 3-way market
The away side in a 3-way market
e.g. the draw in soccer; blank for 2-way
Vig Removal Method
Additive (the standard method) divides each side's implied probability by the total, so each side gives up margin in proportion to its probability.
Hold (Vig)
4.55%
Benchmark: a standard -110 / -110 line holds 4.55% — a lower hold is a cheaper market to bet into.
Total Implied Probability
104.76%
| Side | Fair odds | No-vig prob. | Book odds | Implied |
|---|---|---|---|---|
| Side A | +100 | 50.00% | -110 | 52.38% |
| Side B | +100 | 50.00% | -110 | 52.38% |
Any book offering odds better than the no-vig odds above is giving you a +EV (positive expected value) bet on that outcome.
Last reviewed · How we check our calculators
How it differs: this calculator removes the margin and gives the fair odds of every side. To see how big the margin is, use the Vig Calculator; to read a single price as a probability, the Implied Probability Calculator.
How to Use the No-Vig Calculator
Enter the odds for both sides of your market — Side A and Side B — and the fair odds update as you type. For three-outcome markets like soccer (home / draw / away), also fill in the Draw field. Odds can be typed in American, decimal, or fractional format — pick yours once with the Odds format switch and every betting calculator opens in it. The calculator shows:
- The book's hold (vig %), with a benchmark — a standard -110 / -110 line holds 4.55% — and the total implied probability (overround)
- The implied probability for each side as posted by the book
- The no-vig (fair) probability for each side after removing the margin
- The fair odds for each outcome, in the odds format you picked
Two-way markets (NFL spreads, NBA totals, tennis moneylines) use only Side A and Side B. Leave Draw blank. Fields default to -110 / -110, the standard US point-spread price.
Three-way markets (soccer 1X2, some hockey games where overtime odds are separate) require all three sides. Enter Home Win as Side A, Away Win as Side B and the Draw odds; the table then reads Home / Draw / Away. The calculator removes the book's margin across all three and shows the true fair probability and odds for each outcome.
Use the fair odds as a benchmark when line shopping. Any sportsbook offering odds better than the fair odds shown here is offering a positive expected value (+EV) bet on that outcome.
The Formula
The no-vig method strips the overround out of each side's implied probability so the fair probabilities sum to exactly 100%. The same formula works for 2-way and 3-way markets.
- Convert each side to implied probability (0–1):
- Negative odds: prob = |odds| ÷ (|odds| + 100)
- Positive odds: prob = 100 ÷ (odds + 100)
- Overround = sum of all implied probabilities
2-way: Overround = Prob A + Prob B
3-way: Overround = Prob A + Prob B + Prob C
(Always > 1.0 when the book charges vig) - Vig % = (Overround − 1) ÷ Overround × 100
- No-vig (fair) probability for each side = Implied Prob ÷ Overround
The fair probs always sum to exactly 1.0 (100%). - Fair decimal odds = 1 ÷ Fair Prob
- Fair American odds:
- decimal ≥ 2.0: American = (decimal − 1) × 100 (positive)
- decimal < 2.0: American = −100 ÷ (decimal − 1) (negative)
The mathematical proof that fair probs sum to 100%: (Prob A + Prob B + …) ÷ Overround = Overround ÷ Overround = 1.0. The overround cancels out, leaving a true probability distribution.
Practical Examples
Example 1 — Standard Point Spread (-110 / -110)
The most common line in US sports betting. Both sides are priced at -110.
- Implied Prob A = 110 ÷ 210 = 52.38%
- Implied Prob B = 110 ÷ 210 = 52.38%
- Overround = 1.0476 (104.76%)
- Margin = 4.55%
- Fair Prob A = 52.38% ÷ 1.0476 = 50.00%
- Fair Prob B = 52.38% ÷ 1.0476 = 50.00%
- Fair American odds: +100 / +100 (even money for both sides)
The book is pricing a coin-flip as -110/-110 instead of +100/+100. Every $110 bet costs you an extra $10 compared to the fair price. Over 1,000 -110 bets you need to win 524 times just to break even instead of 500.
Example 2 — Moneyline with Juice (-150 / +130)
A favourite is priced at -150 and the underdog at +130.
- Implied Prob A (-150) = 150 ÷ 250 = 60.00%
- Implied Prob B (+130) = 100 ÷ 230 = 43.48%
- Overround = 1.0348 (103.48%)
- Margin = 3.36%
- Fair Prob A = 60.00% ÷ 1.0348 = 57.98%
- Fair Prob B = 43.48% ÷ 1.0348 = 42.02%
- Fair American odds: approximately -138 / +138
Now line-shop: if another sportsbook offers the underdog at +145, that is better than the fair price of +138 — a genuine +EV opportunity. This is exactly how sharp bettors find edges using consensus lines and no-vig tools.
Example 3 — Soccer 3-Way Market (-130 / +200 / +380)
A Champions League group stage match: Home Win -130, Away Win +200, Draw +380.
- Implied Prob A (-130) = 130 ÷ 230 = 56.52%
- Implied Prob B (+200) = 100 ÷ 300 = 33.33%
- Implied Prob C (+380) = 100 ÷ 480 = 20.83%
- Overround = 56.52% + 33.33% + 20.83% ≈ 110.69% → 1.1069
- Vig ≈ 9.66% — typical for soccer 3-way markets
- Fair Prob A = 56.52% ÷ 1.1069 = 51.06%
- Fair Prob B = 33.33% ÷ 1.1069 = 30.11%
- Fair Prob C = 20.83% ÷ 1.1069 = 18.82%
- Fair odds ≈ -104 / +232 / +431
The book's margin of nearly 10% on this market is much higher than an NFL spread. Any book offering the draw at +450 or better would represent a +EV bet relative to the true fair price of +431.
Using No-Vig Odds for Line Shopping
The no-vig odds represent the consensus market view of the true probability. Open three or four books, enter the sharpest line (usually Pinnacle, Circa, or a betting exchange) into this calculator, then compare the resulting fair odds against the lines offered by soft books like DraftKings or BetMGM. Any line better than the fair odds is worth betting. This strategy — called positive expected value (EV) betting — is the primary edge-finding method used by professional sports bettors worldwide.
Frequently Asked Questions
No-vig (also called fair odds, true odds, or vig-free odds) are the odds that a bookmaker would offer if they charged zero commission. They represent the market's genuine assessment of the true probability of each outcome, without any built-in profit margin. For a standard -110/-110 spread, the no-vig odds are +100/+100 — a pure coin flip with no edge for the house.
Enter the sharpest, most efficient market line you can find — usually from Pinnacle, Circa Sports, or a betting exchange — into the no-vig calculator. The resulting fair odds are your baseline. Then check other sportsbooks for the same game. If any book offers odds that are better than the fair odds (e.g. fair odds are +138 and a book offers +145 on the underdog), you have a positive expected value bet. Over a large sample, consistently betting +EV lines produces long-run profit.
Overround (also called the book percentage or juice) is the total implied probability across all outcomes of a market. A fair market would sum to exactly 100%. Bookmakers deliberately set their odds so the total exceeds 100% — typically 104–110% for two-way markets. The excess is their built-in profit margin. A -110/-110 spread has an overround of 104.76%, meaning for every $100 in balanced bets the book expects to keep $4.55.
Sharp books accept large bets from professional bettors and adjust their lines accordingly. Because their lines are constantly pressured by sharp money, they are the most accurate reflection of the true market probability. Using a sharp book's line as your input gives you the most reliable no-vig baseline. Soft books (recreational-focused sportsbooks) often have stale or shaded lines that are less efficient — making them the best targets for +EV betting when compared against sharp lines.
Yes, the calculator works for any two-outcome market. For player props (e.g. over/under on receiving yards), enter the odds for Over and Under. For futures with two possible outcomes you want to compare, enter both sides. However, note that futures markets often have significantly higher vig than point spreads or totals — margins of 15–25% are common. Always check the margin output before betting futures, as the fair odds may look dramatically different from the posted prices.
Sources
- Mathematics of bookmaking (overround, implied probability, full-cover bets) (Wikipedia)
- Stephen Clarke, Stephanie Kovalchik and Martin Ingram, Adjusting bookmaker's odds to allow for overround (American Journal of Sports Science, 2017)
- Odds — decimal, fractional and moneyline formats (Wikipedia)
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