Calculate sportsbook margin and find no-vig fair odds
Calculate sportsbook margin
Vig analysis and fair odds
| Outcome | Book Odds | Implied % | Fair % | No-Vig Odds |
|---|---|---|---|---|
| Side 1 | 1.91(-110) | 52.38% | 50.00% | |
| Side 2 | 1.91(-110) | 52.38% | 50.00% |
Common vig scenarios
Typical vig percentages by market
| Market Type | Typical Odds | Vig | Rating |
|---|---|---|---|
| Reduced Juice | -105 / -105 | 2.44% | Excellent |
| Low Juice | -107 / -107 | 3.27% | Good |
| Standard Spread | -110 / -110 | 4.76% | Standard |
| High Juice | -115 / -105 | 5.47% | High |
| Soccer 3-Way | +150 / +220 / +200 | 6.97% | High |
Understanding vig/juice in betting
Vig (juice/hold) is the sportsbook's margin. Calculate it by adding implied probabilities: standard -110/-110 lines equal 52.4% + 52.4% = 104.8%, meaning 4.8% vig. No-vig fair odds would be +100/+100 (50%/50%). Lower vig means better value for bettors.
Important information to know
Common questions about vig
The vig, also called juice or hold, is the commission sportsbooks charge on bets. It's built into the odds so that the total implied probability exceeds 100%. For example, -110 on both sides of a spread means the book profits regardless of the outcome.
Add the implied probabilities of all outcomes. For 2-way markets: IP1 + IP2 - 100% = Hold. For -110/-110: 52.38% + 52.38% = 104.76%, so the hold is 4.76%. For 3-way markets, add all three probabilities and subtract 100%.
Standard vig is 4.5-5% (-110/-110). Low vig books offer -105/-105 or better (2.4% or less). Some offshore books offer -102/-102 on select markets. Even 1-2% vig reduction significantly impacts long-term profitability.
Vig is the main reason most bettors lose long-term. At standard -110 vig, you need to win 52.4% to break even. Reducing vig to -105 lowers the break-even point to 51.2%. Over thousands of bets, this difference adds up to significant money.
No-vig (or "true") odds remove the sportsbook's margin to show what odds would be if there were no house edge. They're calculated by dividing each implied probability by the total implied probability, then converting back to odds.