What Is Vig in Football Betting?
Vig, also called juice, is the sportsbook's built-in commission on a betting market. Standard football spreads and totals are often priced at -110 on both sides, which means a bettor risks $110 to win $100. The extra risk is not part of the prediction. It is the cost of placing the bet at that price.
On a true 50/50 market with no vig, both sides would be +100. A -110/-110 market converts to 52.38% implied probability on each side. Added together, the market shows 104.76% instead of 100%. That extra 4.76 percentage points is the overround, and it translates to a 4.55% house edge.
The Break-Even Number: 52.38%
At -110 odds, a bettor must win 52.38% of bets to break even.
A 52% win rate still loses money at standard juice. A 53% win rate can be profitable, but only if the average price stays close to -110.
For a single-side odds conversion, use the Implied Probability Calculator. This vig calculator is better when both sides of a market are available and the goal is to remove the book's margin.
Why Vig Changes the Bet
- Break-even rate: The worse the price, the more often the bet has to win before it becomes profitable.
- Point buying: Moving a football spread from -3 to -2.5 may raise the price from -110 to -125. The half point has to be valuable enough to justify the higher break-even rate.
- Line shopping: A move from -110 to -105 looks small, but it lowers the required win rate from 52.38% to 51.22%.
- Market comparison: Removing vig makes it easier to compare a spread, total, or moneyline against a bettor's own probability estimate.
Vig Levels for Football Bettors
| Odds | Breakeven Win % | House Edge | Verdict |
|---|---|---|---|
| -105/-105 | 51.22% | 2.38% | Great (Low Juice) |
| -108/-108 | 51.92% | 3.70% | Good |
| -110/-110 | 52.38% | 4.55% | Standard |
| -115/-105 | 52.17% / 51.22% | 4.85% | Acceptable |
| -115/-115 | 53.49% | 6.52% | Expensive (Avoid) |
| -120/-100 | 54.55% / 50% | 6.67% | Expensive (Avoid) |
How to Use the Vig Calculator
Enter the odds for both sides of the same market, such as Chiefs -3.5 and Raiders +3.5, or Over 47.5 and Under 47.5. The calculator converts each price to implied probability, totals the market, then removes the extra margin above 100%.
The fair odds output shows what each side would be priced at without juice. If one sportsbook posts -110/-110 and another posts -105/-105 on the same line, the reduced-juice book gives a lower break-even point before any opinion about the game is even considered.
Finding Better Lines
Not all sportsbooks charge the same vig. Shopping for better odds is one of the easiest ways to improve long-term betting results because the same pick can have a different expected return at a different book.
| Book Type | Typical Vig | Best For |
|---|---|---|
| Pinnacle | 2-3% | Sharp bettors, high limits |
| Circa Sports | 3-4% | Vegas locals, contest players |
| BetOnline (-105 program) | 2.5% | Reduced juice seekers |
| DraftKings / FanDuel | 4-5% | Promos, boosts, SGPs |
| Local book | 4-10% | Convenience, credit |
The Math on Line Shopping
Assume 100 NFL bets in a season at $100 per game and a 50% win rate. The price alone changes the result:
- At -105: Lose $488
- At -110: Lose $1,000
- At -115: Lose $1,535
That is a $1,047 gap between the best and worst juice. Same bets, same outcomes, different sportsbooks.
When the market involves a point spread, compare the implied moneyline value with the Spread to Moneyline Converter before deciding whether the price is worth paying.
Vig Formulas
The calculator starts by converting each set of odds into implied probability. If the two probabilities add up to more than 100%, the amount above 100% is the sportsbook overround. The house edge expresses that overround as a share of the total market.
The no-vig probability is not a prediction by itself. It is the market's price after removing the sportsbook margin, which makes it a cleaner benchmark for comparing lines.
Vig Calculator Questions
What is the vig on standard NFL bets?
Standard NFL spreads and totals at -110/-110 carry a 4.55% house edge. Each side has a 52.38% implied break-even rate, and the combined market totals 104.76% before the margin is removed.
What win percentage is needed at -110 odds?
At -110 odds, a bettor needs to win 52.38% of bets to break even. A lower price such as -105 drops the break-even point to 51.22%, while -115 raises it to 53.49%.
How much does vig cost over a football season?
At a 50% win rate over 100 bets, -110 pricing loses about $1,000 when each wager risks $110 to win $100. Reduced juice at -105 cuts that loss by more than half.
What are fair odds on a 50/50 bet?
Fair odds on a true 50/50 bet are +100 on both sides. Any price worse than even money requires a win rate above 50% to break even.
Is lower vig more important than a better pick?
Lower vig does not replace handicapping, but it improves the price of the same opinion. A good bet can become mediocre at bad juice, and a marginal bet can become playable if the price improves enough.
Does vig matter on moneyline bets?
Yes. Moneyline markets include margin just like spreads and totals. Convert both sides to implied probability, add them together, and remove the amount above 100% to estimate the no-vig price.