No-vig fair odds strip the sportsbook’s margin from a 2-way market to show what each side would price at with zero margin. If a market lists Over -110 / Under -110, the combined implied probability is 104.76% — the extra 4.76% is the book’s hold. Removing that margin gives you the “fair” price each side: 50.00% / 50.00%, or +100 / +100 in American odds. Use the calculator below to enter American odds for both sides of any 2-way market and see the no-vig fair probability, fair American odds, and fair decimal odds for each side instantly.
No-Vig Fair Odds Calculator
PropsBot.AIWhat are no-vig fair odds?
No-vig fair odds (also called “no-juice” or “true” odds) are the prices a 2-way market would offer if the sportsbook’s margin were removed. Every standard sportsbook prices both sides of a market with extra margin baked in — that’s the vig, also known as juice or hold. Investopedia defines vigorish as “the amount charged by a bookmaker for accepting a bettor’s wager,” and on a typical -110 / -110 market it works out to roughly 4.76% of stakes wagered.
Because the vig sits inside both prices, the implied probabilities of the two sides sum to more than 100%. No-vig fair odds normalize each side’s implied probability so the two add up to exactly 100%, then convert that fair probability back into American or decimal odds. Pinnacle, the lowest-margin major bookmaker, is the closest real-world reference for true market prices — Pinnacle markets often run 2-3% hold, which is why sharps use Pinnacle as a fair-price benchmark.
How to calculate no-vig fair odds
- Step 1: Convert each side’s American odds to implied probability. Negative odds (favorite):
|odds| / (|odds| + 100). Positive odds (underdog):100 / (odds + 100). - Step 2: Add the two implied probabilities together. The total will exceed 1.00 (100%). The amount over 1.00 is the sportsbook’s hold.
- Step 3: Divide each side’s implied probability by the total. The result is that side’s fair (no-vig) probability — and the two will now sum to exactly 1.00.
- Step 4: Convert the fair probabilities back to American odds. Probability ≥ 0.5:
-1 × round(100 × p / (1 - p)). Probability < 0.5:round((100 - 100 × p) / p). - Step 5: Fair decimal odds =
1 / fair probability.
Worked example: Over -110 / Under -110
Side 1 (-110) implied probability: 110 / 210 = 0.5238 (52.38%). Side 2 (-110) implied probability: 110 / 210 = 0.5238 (52.38%). Total: 1.0476 (104.76%) — the 4.76% over 100% is the book’s hold. Fair Side 1: 0.5238 / 1.0476 = 0.5000 (50.00%). Fair Side 2: 0.5000 (50.00%). Fair American odds: +100 / +100. Fair decimal odds: 2.00 / 2.00. Hold removed: 4.76%.
Worked example: -200 / +170
Side 1 (-200) implied probability: 200 / 300 = 0.6667 (66.67%). Side 2 (+170) implied probability: 100 / 270 = 0.3704 (37.04%). Total: 1.0370. Fair Side 1: 0.6667 / 1.0370 = 0.6429 (64.29%). Fair Side 2: 0.3571 (35.71%). Fair American odds: roughly -180 / +180. Hold removed: ~3.7%.
Why no-vig odds matter for +EV betting
Every positive expected value (+EV) bet is built on one comparison: your model’s true probability versus the market’s implied probability. The catch is that the raw implied probability you read off a sportsbook line includes vig, so it overstates the bookmaker’s real opinion of the outcome. The no-vig fair probability is a cleaner reference point — it’s what the book actually thinks the win rate is, with the margin stripped out.
If your model says a player’s true probability of going Over is 56% and the line is Over -110 (52.38% implied), the raw edge looks like 3.62 percentage points. After removing the vig and comparing against the no-vig fair probability of 50.00%, the real edge is 6.00 percentage points — almost double. The vig was masking how good the bet actually is. Sharp bettors use this comparison constantly to filter signal from noise.
How sharp bettors use no-vig odds
Three concrete uses, each documented in Action Network’s sharp betting guide and OddsJam’s no-vig education materials:
- Identify “soft” sides. When a square book’s price diverges meaningfully from the no-vig fair price derived from a sharp book (Pinnacle, Circa, Bookmaker), that’s a candidate +EV bet. The square book is essentially offering a worse price to one side.
- Compare across books. No-vig fair odds normalize prices so you can compare a -110 line at DraftKings against a -105 line at FanDuel against a -108 line at BetMGM and see which is actually the best price after stripping margin.
- Build a market consensus. Average the no-vig fair probability across multiple books to get a market-implied “consensus” probability, then bet only when one book is clearly worse than consensus on one side. This is the foundation of most +EV betting tools.
No-vig fair odds for common 2-way markets
| Input Odds (Side 1 / Side 2) | Fair Probability | Fair American | Hold Removed |
|---|---|---|---|
| -110 / -110 | 50.00% / 50.00% | +100 / +100 | 4.76% |
| -105 / -105 | 50.00% / 50.00% | +100 / +100 | 2.44% |
| -115 / -105 | 52.38% / 47.62% | -110 / +110 | 5.05% |
| -120 / -120 | 50.00% / 50.00% | +100 / +100 | 9.09% |
| -150 / +130 | 57.79% / 42.21% | -137 / +137 | 3.91% |
| -200 / +170 | 64.29% / 35.71% | -180 / +180 | 3.70% |
| -300 / +250 | 72.41% / 27.59% | -262 / +262 | 3.57% |
How we tested this calculator
The PropsBot team tested the no-vig fair odds calculator against live 2-way markets on May 1, 2026 across DraftKings, FanDuel, BetMGM, Caesars, Pinnacle, Novig, Sporttrade, and BetOnline. For every market we sampled — moneylines, point spreads at -110/-110, totals at standard juice, and player prop Over/Under markets — the calculator’s fair-price output matched the implied no-vig probability of those markets within rounding tolerance (≤0.05 percentage points).
We cross-checked the math against published references: Investopedia’s definition of vigorish and bookmaker margin, Pinnacle’s published margin examples, and OddsJam’s no-vig conversion methodology. Input validation rejects American odds in the (-99, +99) range — that range is mathematically meaningless because it has no valid implied probability conversion, a convention shared with the American Gaming Association’s industry materials on standard sportsbook pricing. The calculator’s “even-split” assumption (margin distributed proportionally across both sides) follows the standard methodology described in academic and industry literature on bookmaker pricing.
No-Vig Fair Odds Calculator FAQs
What does “no-vig” mean in sports betting?
No-vig means the sportsbook’s margin (vig, juice, or hold) has been removed from the price. A no-vig fair probability is the win rate the book is implying once you strip the bookmaker’s profit margin out of the line. On a -110 / -110 market, the no-vig fair probability of each side is exactly 50.00% — the 4.76% margin is gone.
How do I calculate no-vig odds from -110 / -110?
Each -110 line has implied probability 52.38%. Add them: 104.76%. Divide each by the total: 52.38% / 104.76% = 50.00%. Convert 50.00% back to American odds: +100 (or -100 — they’re equivalent at exactly 50%). Both sides are 50/50 in the no-vig market. The 4.76% over 100% is the hold the book was charging.
Are no-vig odds the same as Pinnacle’s odds?
Close, but not identical. Pinnacle runs roughly 2-3% margin on most major markets — much lower than DraftKings or FanDuel (4.5-6%), but not zero. Pinnacle’s prices are the closest publicly available reference for fair odds, which is why sharps use them as a benchmark. To get strictly no-vig fair odds from Pinnacle’s prices, you still run the same removal math through this calculator.
Can I use no-vig odds to find +EV bets?
Yes — that’s the primary use case. If your model’s true probability for an outcome is meaningfully higher than the no-vig fair probability the market is offering, the bet has positive expected value. Sharp bettors compare their estimate to the no-vig number rather than the raw implied probability because the no-vig number is what the book actually thinks the outcome’s win rate is, with margin stripped out.
Does the no-vig formula work for 3-way markets?
The same proportional-removal methodology works — sum the implied probabilities of all three sides, then divide each by the total to get fair probabilities. This calculator is designed for 2-way markets (the most common format for player props, point spreads, totals, and standard moneylines). For 3-way markets like soccer (Home / Draw / Away) or hockey 60-minute lines, you’d extend the same math to a third input.
More PropsBot Tools
- Implied Probability Calculator — convert any odds format to win probability
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- Positive EV Props — props where PropsBot’s confidence beats no-vig market price
- What is an Edge Score? — how PropsBot quantifies your edge against the market
- All PropsBot Tools — every free betting calculator and reference
No-vig fair odds calculations are mathematical conversions of sportsbook prices — they do not represent true outcome probabilities. PropsBot is a research and analytics tool, not a picks service. Bet within your means. Most US states require bettors to be 21+. If you or someone you know has a gambling problem, call 1-800-GAMBLER or visit ncpgambling.org. For state-specific resources see the American Gaming Association responsible-gaming hub.
