What Does −110 Mean in Betting?
If you've looked at a point spread or totals line, you've almost certainly seen −110 next to both sides. It's the most common number in American sports betting — and once you understand what it means, a lot of other things click into place.
The short answer
−110 means you must bet $110 to win $100. If your bet wins, you get back your $110 stake plus $100 in profit — $210 total. If it loses, you're out $110. The number isn't describing a favorite or underdog; it's describing the cost of placing the bet.
Why −110 and not −100?
That extra $10 is how the sportsbook makes money. It's called the vig (short for vigorish) or the juice. When both sides of a bet are priced at −110, the book collects more than it pays out on every game regardless of which side wins.
Here's the math: imagine $110 is bet on each side of a spread — $220 total. The winning side gets back $210 ($110 stake + $100 profit). The sportsbook keeps $10. That $10 is the vig.
What −110 looks like on a real line
| Team | Spread | Odds | To win $100, risk |
|---|---|---|---|
| Chiefs | −3.5 | −110 | $110 |
| Raiders | +3.5 | −110 | $110 |
Both sides cost the same to play. The spread is doing the work of balancing the bet — one team gives points, the other gets them. −110 just tells you the price on each side.
When does −110 change?
Sportsbooks move the price when they need to balance action. If too much money is coming in on one side, the book might shift the odds to −115 or −120 on that side (making it more expensive) and drop the other to −105 (making it cheaper). You'll also see lines priced at −105 or better at reduced-juice books, which is a meaningful long-term edge if you shop lines.
Implied probability of −110
Every price contains an implied probability — the win percentage you'd need to break even at that price. At −110, break-even is 52.4%. That means if you bet spreads at −110 all season, you need to win more than 52.4% of your bets just to stay even. Most recreational bettors don't clear that bar.
| Price | Break-even win % |
|---|---|
| −105 | 51.2% |
| −110 | 52.4% |
| −115 | 53.5% |
| −120 | 54.5% |
How LineScout shows it
Every game on LineScout shows the current spread and total with live odds — including when a book has moved off the standard −110. If you prefer decimal or fractional format, flip the display with one click. −110 in American odds is 1.91 in decimal — the same price, different notation. See live odds →