True probability · juice removed
No-Vig Calculator
Remove the sportsbook’s margin to find the fair implied probability for both sides.
What vig-stripping tells you
A book prices a coin flip at −110/−110. Both sides imply 52.38%, summing to 104.76%. The 4.76% excess is the vig. Strip it: 52.38 / 104.76 = 50% — the fair no-vig probability. If your model estimates a side above its no-vig number, you may have a +EV edge. Use these numbers as inputs to the Kelly calculator.
FAQ
What is vig (juice)?
The sportsbook's margin built into the odds. On a fair 50/50 market, both sides would be priced at +100. At −110/−110 the book takes about 4.5 cents per dollar of action. Vig is how sportsbooks earn revenue.
How does vig-stripping help bettors?
It gives you a market-neutral baseline probability. If your research estimates a side above its no-vig number, that gap is your potential edge. Betting into vig without edge is a guaranteed long-run loss.
Do all markets have the same vig?
No. Liquid NFL sides often have 4–5%. Player props, futures, and exotic markets can have 8–15%+ vig. Wider vig makes +EV harder to find.
What is a sharp number?
The opening line set to attract sharp money. The consensus no-vig price across 5+ sharp books is treated as the most accurate market estimate of true probability.
More: Calculator hub · Odds Converter · Kelly · Parlay · Hedge
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