Quick Answer
No-vig odds are a betting line with the sportsbook’s commission stripped out — the market’s true estimated probability. Pull the vig off -110/-110 and both sides sit at 50%. Compare your price to the no-vig number and you can see exactly what the book is charging you.
Last updated July 9, 2026.
No-vig odds (also called fair odds or true odds) are sportsbook prices with the bookmaker’s built-in commission — the “vig” or “juice” — mathematically removed. They represent the true implied probability the market is assigning to an outcome. Sharp bettors use no-vig odds to measure expected value and Closing Line Value accurately.
How No-Vig Odds Work
Every sportsbook line includes vig. A standard NFL spread of -110/-110 doesn’t mean the book thinks each side has a 50% chance — it means each side’s implied probability is 52.38%, totaling 104.76%. That extra 4.76% is the vig (also called overround or hold).
To find no-vig odds, normalize the implied probabilities so they add to 100%.
Worked example: NFL spread Cowboys -3 (-110) vs. Eagles +3 (-110)
Step 1 — Convert American odds to implied probability:
- -110 → 110 / (110 + 100) = 0.5238 (52.38%)
- -110 → 110 / (110 + 100) = 0.5238 (52.38%)
- Total = 1.0476 (104.76%)
Step 2 — Normalize (divide each by the total):
- Cowboys: 0.5238 / 1.0476 = 0.5000 (50.00%)
- Eagles: 0.5238 / 1.0476 = 0.5000 (50.00%)
Step 3 — Convert no-vig probability back to American odds:
- 50.00% = +100 (true even-money price)
The book is offering -110 on a true 50/50 line. The 4.76% gap is the vig. To break even at -110, you need to win 52.38% of bets.
Asymmetric example: Yankees ML -150 / Red Sox ML +130
- -150 implied = 60.00%
- +130 implied = 43.48%
- Total = 103.48%
- No-vig Yankees = 60.00 / 103.48 = 57.98% → fair odds -138
- No-vig Red Sox = 43.48 / 103.48 = 42.02% → fair odds +138
If your model says the Yankees should win 62%, you have a +EV bet at -150.
How to Use No-Vig Odds When Betting
- Find +EV bets: Compare your model’s probability to the no-vig line. If your number is higher, you have an edge.
- Measure CLV: Calculate no-vig at your bet time and at close. The difference is true CLV.
- Shop lines: Convert prices at multiple books to no-vig and bet the best one.
- Use a tool: PropsBot’s No-Vig Fair Odds Calculator does this instantly.
PropsBot’s MLB models post a Brier score of 0.1903 vs. Vegas 0.1947 — meaning the model’s probability estimates are better-calibrated than the market’s no-vig price, which is how the High ROI Signal produced +60,778 units profit across all sports.
Common Mistakes and Misconceptions
- “-110 means 50/50.” It doesn’t. -110 implies 52.38%; the no-vig fair odds are +100.
- Forgetting to normalize: Just converting odds to implied probability isn’t enough — you have to remove the overround.
- Using vig’d odds for EV math: This always understates your edge. Always strip vig first.
- Assuming all books vig equally: Reduced-juice books (like -105/-105 lines) have lower vig and are sharper to bet into.
FAQ
What is the typical vig on a -110/-110 line?
4.76%. The book holds an expected 4.76% on balanced action.
What is the no-vig formula?
Convert each side’s odds to implied probability, sum them, and divide each side’s probability by the sum. That’s the no-vig probability.
Why do sharp bettors care about no-vig odds?
Because they reveal the true market price. You can’t measure expected value or CLV against a vig’d number.
Are reduced-juice books better?
Yes. Books at -105/-105 have ~2.4% vig vs. the standard 4.76%. Lower vig means more profit on winning bets.
Can I calculate no-vig for player props?
Yes — same formula. Prop markets often have higher vig (8-10%), so removing it is even more important.
Internal Links
- /tools/no-vig-fair-odds-calculator/ — Auto-calculate no-vig odds for any market
- /glossary/closing-line-value/ — Use no-vig odds to measure CLV
- /glossary/moneyline/ — Understand American odds before stripping vig
What It Means For Bettors
Betting mechanics matter because the same opinion can be good, bad, or unplayable depending on price and rules.
A practical read compares the implied probability to the bettor's true number, then decides whether the edge survives the available price. That is where a glossary page becomes useful: it turns a term into a decision rule instead of a vocabulary note.
Settlement And Book Rules
Different books can use different grading rules, payout limits, void rules, and hold, so price comparison is part of the bet. A page can define the term correctly and still lead a bettor wrong if it ignores how the posted market is actually graded.
The safest workflow is to check the market name, player or team eligibility, timing window, stat source, void language, and price before treating a bet as comparable across sportsbooks.
Betting Example
If the page is explaining No-Vig Odds?, do not stop at the definition. Ask what would make the market move, which sportsbook rule controls grading, and whether the available number is still better than the model's fair line.
That same discipline is why PropsBot connects definitions to props, picks, odds shopping, and tracked results. The term explains the market; the model and price decide whether the bet is playable.
When To Use This Definition
Use this definition when you are comparing a market across books, checking whether two prices are really the same bet, or trying to understand why the model likes one side more than the public market does. The term should narrow the decision. It should not replace the decision.
The common mistake is treating a glossary answer as a pick. A bettor still needs the current line, the available price, the event context, and a reason the number is different from fair value. If those pieces are missing, the better move is usually to wait, shop, or pass.
For PropsBot, the best use of a glossary page is as a bridge. Read the definition, then move into the market page, compare prices, and check whether the tracked model signal supports the bet. That keeps the term tied to a current decision instead of leaving it as static sports-betting vocabulary.
That structure also helps search engines and AI answer engines understand the page: direct definition first, betting context second, and clear routes into the live PropsBot pages where the user can act.
Related PropsBot Pages
No-Vig Odds? FAQ
Why does this term matter for betting?
It matters because the term can change how a market is priced, what counts for settlement, and whether a bettor is comparing the same bet across books.
Should this term be used by itself to make a pick?
No. Use it as context, then check role, matchup, price, model edge, and sportsbook rules before deciding whether to bet or pass.
Where should I go after reading the definition?
Move from the definition into the relevant props, picks, odds-shopping, or calculator page so the term is tied to an actual decision instead of a static note.
Frequently Asked Questions
What is the typical vig on a -110/-110 line?
4.76%. The book holds an expected 4.76% on balanced action.
What is the no-vig formula?
Convert each side’s odds to implied probability, sum them, then divide each side’s probability by the sum.
Why do sharp bettors care about no-vig odds?
They reveal the true market price. You can’t measure expected value or CLV against a vig’d number.
Are reduced-juice books better?
Yes. Books at -105/-105 have about 2.4% vig vs. the standard 4.76%, which means more profit on winning bets.
Can I calculate no-vig for player props?
Yes. Prop markets often have 8-10% vig, so removing it is even more important than on game lines.
