NFL odds list three markets per game: a moneyline on who wins, a point spread on the winning margin, and a total on combined points. The number beside each is the price. −110 means risking $110 to win $100, an implied probability of 52.38%. Both sides priced that way sum to 104.76%, and that surplus is the sportsbook's margin.
See the current market on the NFL odds board.
The three numbers on every NFL game
A sportsbook posts three separate markets for a typical NFL game. Each asks a different question, and each carries its own price.
| Market | The question it settles | Typical listing |
|---|---|---|
| Moneyline | Which team wins the game outright | Chiefs −250 / Broncos +200 |
| Point spread | Does the favorite win by more than the number | Chiefs −5.5 (−110) |
| Total (over/under) | Are the two teams' points combined over or under the number | O 47.5 (−110) / U 47.5 (−110) |
The team with the minus sign in front of its moneyline is the favorite. The minus sign in front of a spread means that team is giving points, so its score is reduced by the spread before the bet is settled.
What does −110 mean?
−110 is a price, not a probability of anything happening on the field. It says: risk $110 to win $100. Stated per $100 risked, it returns $90.91 in profit, and the stake comes back too.
In decimal terms −110 is 1.9091: a $10 bet returns
$19.09 in total. Its implied probability is
52.38% — the break-even rate. A bettor paying
−110 has to be right 52.38% of the time simply to come out level.
Converting any price
Every American price converts to a decimal price and an implied probability by the same two rules: a positive price divides by 100, a negative price divides 100 by its own size.
| American | Decimal | Implied probability | Profit on $100 |
|---|---|---|---|
| −300 | 1.333 | 75.00% | $33.33 |
| −250 | 1.400 | 71.43% | $40.00 |
| −200 | 1.500 | 66.67% | $50.00 |
| −150 | 1.667 | 60.00% | $66.67 |
| −130 | 1.769 | 56.52% | $76.92 |
| −110 | 1.909 | 52.38% | $90.91 |
| −105 | 1.952 | 51.22% | $95.24 |
| +100 | 2.000 | 50.00% | $100.00 |
| +110 | 2.100 | 47.62% | $110.00 |
| +130 | 2.300 | 43.48% | $130.00 |
| +150 | 2.500 | 40.00% | $150.00 |
| +200 | 3.000 | 33.33% | $200.00 |
| +250 | 3.500 | 28.57% | $250.00 |
| +300 | 4.000 | 25.00% | $300.00 |
Implied probability is the break-even win rate the price demands. It includes the sportsbook's margin, so it is always higher than the book's own honest estimate of the chance.
Why both sides add up to more than 100%
Hang −110 on both sides of a spread and the two implied probabilities do not add to 100. They add to 104.76%. That surplus is the sportsbook's margin, usually called the vig or the juice.
| Two-sided price | Side A implied | Side B implied | Sum | Margin |
|---|---|---|---|---|
| −110 / −110 | 52.38% | 52.38% | 104.76% | 4.76 pts |
| −105 / −105 | 51.22% | 51.22% | 102.44% | 2.44 pts |
| −120 / +100 | 54.55% | 50.00% | 104.55% | 4.55 pts |
| −250 / +200 | 71.43% | 33.33% | 104.76% | 4.76 pts |
A market's margin is the amount its two prices exceed 100%. The narrower that figure, the less the price is padded.
This is why implied probability cannot be read as a forecast. A market showing 52.38% on each side of a coin flip is not claiming both teams are favorites; it is charging for the bet twice.
Reading a full NFL listing
Put together, one line on a board might read:
- Chiefs −5.5 (−110) — Kansas City must win by 6 or more; the price to take that side is −110.
- Broncos +5.5 (−110) — Denver can lose by 5 or fewer, or win.
- Chiefs −250 — the moneyline, no margin condition attached.
- Over 47.5 (−110) — the two scores together must exceed 47.5.
Half-point numbers exist to remove ties. On a whole number such as −3 or a total of 44, a result that lands exactly there is a push and the stake is returned.
Prices differ between books
The same game is priced independently by every sportsbook, and the numbers move at different times and by different amounts. Comparing them is the whole point of an odds board: a spread of −3 at one book and −3.5 at another are materially different bets on the same game, and 3 is the single most common NFL margin.
Next steps
Frequently asked questions
What does −110 mean in NFL betting?
It is the price: risk $110 to win $100. Its implied probability is 52.38%, which is the rate a bettor must hit to break even.
Is implied probability the same as the chance of winning?
No. Implied probability includes the sportsbook's margin, which is why the two sides of a market add to more than 100%. It is a break-even rate, not a forecast.
What does a plus number mean, such as +200?
A positive price is the profit on a $100 stake, so +200 returns $200 profit plus the $100 back. Positive prices belong to underdogs.
Why do two sportsbooks show different numbers for the same game?
Each book prices independently and moves at its own pace. Half a point of spread or five cents of price is a genuinely different bet, which is why boards compare books.
Related: NFL odds board · odds converter · betting glossary · moneyline vs spread
This guide explains how a betting market works and how the arithmetic is done. It is information, not betting advice: Nebula Insights publishes no picks, no selections and no recommended wagers. Sportsbook rules vary by book and jurisdiction — always confirm the house rules that apply to your account. 18+ only.