Learn / No-Vig
What is the line actually saying? No-vig odds for sports betting.
The devigging math behind every NuroPicks edge number. Strip the juice and read the market consensus, not the sportsbook offer.
Plain-English answer
No-vig odds are the fair-market price of a bet after the sportsbook commission has been stripped out. Books bake roughly 4 to 5 percent of margin into a standard two-way market, so a -110/-110 line implies 52.4 percent on each side, not the 50 percent the market is actually pricing. Devigging recovers the true fair probability so you can compare your model number to the market consensus, not to the juiced offer. The formula is simple: divide each side's implied probability by the sum of both sides' implied probabilities. Every NuroPicks Pro and Elite pick is graded against the no-vig line before EV percentage is published. Run /no-vig in the Discord server or open /tools/no-vig-calculator to devig any line yourself.
The formula
p_fair = p_implied / (p_implied_side_A + p_implied_side_B)
- p_implied = the probability the offered American odds imply (negative odds: |odds|/(|odds|+100); positive odds: 100/(odds+100)).
- p_implied_side_A + side_B = the sum across both sides of the same market. On a vig-free book this would equal 1.00. On a real book it lands above 1.00 by the hold percentage.
- p_fair = the no-vig (devigged) probability for that side. This is the number you compare your model probability to.
This is the additive method. NuroPicks runs the multiplicative variant (Shin model) on three-way and futures markets where the additive method biases against favorites. The /no-vig command auto-picks the right method per market.
Worked example
Tuesday 8:00 PM ET. Celtics at -110, Sixers at -110. Standard two-way spread market.
Step 1. Convert offered odds to implied probability:
- Celtics -110: 110 / (110 + 100) = 0.524 (52.4%)
- Sixers -110: 110 / (110 + 100) = 0.524 (52.4%)
- Sum: 0.524 + 0.524 = 1.048 (the 4.8% above 1.00 is the book hold)
Step 2. Devig by dividing each side by the sum:
- Celtics fair: 0.524 / 1.048 = 0.500 (50.0%)
- Sixers fair: 0.524 / 1.048 = 0.500 (50.0%)
The fair line is a true coin flip. The book is charging you 52.4 percent for what is actually a 50 percent shot. If your model has Celtics at 53 percent, your true edge is 3 points (53 - 50), not 0.6 points (53 - 52.4) and not 6 points (53 - 47).
Run any line through /no-vig in Discord or /tools/no-vig-calculator on the web before scoring any edge.
Three devigging traps that overstate your edge
- Devigging one book in isolation. A single sportsbook's no-vig line is still that book's read on the market, not the consensus. Pull no-vig prices from at least three sharp books (Circa, Pinnacle, Bookmaker) and average. NuroPicks weights sharp books at 70 percent and retail books at 30 percent.
- Using the additive method on three-way soccer markets.Draw markets bias the additive method against favorites by 1 to 2 percentage points. Three-way moneylines, hockey 60-minute markets, and all futures should use the multiplicative (Shin) variant.
- Forgetting the no-vig line is not your edge. No-vig tells you what the market thinks. Your EV comes from the gap between your model and that fair number. A 53 percent model on a 50 percent fair line is a +3 point edge, not a 53 percent win rate. Stake size off the gap, not the absolute.
Use it live
Every NuroPicks Pro and Elite pick devigs the line before publishing EV percentage. Pair this with EV for the dollar value per bet and CLV for post-bet validation.
21+ only. Not financial advice. 1-800-GAMBLER.
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