Sports Betting · Red Meat & Cigar Club editorial
How to Read American Odds
What -110, +150, and the spread actually mean.
Walk into a sportsbook or open a betting app and you're hit with a wall of plus signs, minus signs, and decimals. It looks complicated, but American odds follow one simple idea: everything is measured against $100. Once that clicks, every number on the board tells you two things — how much you can win, and how likely the book thinks the outcome is.
Minus numbers: the favorite
A minus number tells you how much you'd need to risk to win $100. At -150, you risk $150 to win $100; if it wins, you get back $250 (your stake plus profit). The bigger the minus number, the heavier the favorite. At -300 you risk $300 to win $100. You don't have to bet those amounts — the ratio scales. At -150, a $15 bet wins $10.
Plus numbers: the underdog
A plus number tells you how much you'd win on a $100 stake. At +150, $100 wins $150, returning $250. At +400, $100 wins $400. Again it scales: $10 at +150 wins $15.
The -110 standard
Point spreads and totals are very often priced at -110 on both sides. That means you risk $110 to win $100 — or $11 to win $10 — no matter which side you take. The extra $10 is the sportsbook's margin, the "vig" or "juice." It's why you'll see -110 everywhere and why, at that price, you need to win about 52.4% of your bets just to break even.
Turning odds into probability
Every price implies a probability — the win rate at which the bet breaks even:
- Minus odds: odds ÷ (odds + 100). Example: -150 → 150 ÷ 250 = 60%.
- Plus odds: 100 ÷ (odds + 100). Example: +150 → 100 ÷ 250 = 40%.
If you add up both sides of a market, the total is usually more than 100%. In a game priced -110 / -110, each side implies about 52.4%, for a total of roughly 104.8%. That extra is the book's built-in edge. Our implied probability guide goes deeper.
The three most common bets
Moneyline: pick the winner, priced with plus and minus odds. Example: Home -170, opponent +145. See moneylines.
Point spread: the favorite must win by more than a set number. Example: Home -6.5 means Home must win by 7 or more; the opponent +6.5 covers by winning or losing by 6 or fewer. See spreads.
Total (over/under): a bet on the combined score. Example: 47.5 — the over needs 48 or more points. See totals.
Reading a full betting line
A typical football listing might look like this (example numbers, not real lines):
- Home -6.5 (-110) / Opponent +6.5 (-110)
- Moneyline: Home -260 / Opponent +215
- Total: O 44.5 (-110) / U 44.5 (-110)
Read it as: the book makes Home about a touchdown better; the home team's moneyline implies roughly a 72% chance of winning; and the expected combined score sits in the mid-40s.
Decimal and fractional odds
Outside the U.S., you'll see decimal odds (2.50) and fractional odds (3/2). They're the same price written differently: +150 = 2.50 = 3/2. Our odds formats guide shows how to convert.
What odds don't tell you
Odds are the sportsbook's price, shaped by its models, its margin, and the money it takes in. They're not a guarantee and not a prediction you can bank on. Underdogs win all the time; favorites lose. Understanding the numbers makes you a more informed fan — it doesn't make betting profitable. Keep stakes small and treat it as entertainment.
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