How to read American odds
A plus number is how much you win on a $100 bet. A minus number is how much you bet to win $100. So +150 wins $150 on $100, and -110 means you bet $110 to win $100.
Plus odds: the underdog
+150: a $100 bet wins $150 profit, returning $250. A $20 bet wins $30. The bigger the number, the bigger the underdog.
Minus odds: the favourite
-200: bet $200 to win $100, returning $300. A $50 bet wins $25. The bigger the number, the bigger the favourite.
-110: the standard price
Spreads and totals are usually -110 on both sides. You bet $110 to win $100. The extra $10 is how the book earns (the vig), which is why you need to win 52.38% of -110 bets to break even.
What the odds imply
| Odds | $100 bet wins | Implied chance |
|---|---|---|
| -200 | $50 | 66.67% |
| -110 | $90.91 | 52.38% |
| +100 | $100 | 50.00% |
| +150 | $150 | 40.00% |
| +300 | $300 | 25.00% |
Convert any price with the odds converter.
Questions
What does +150 mean in betting?
A $100 bet wins $150 profit if it wins, returning $250 in total. The implied chance is 40%.
What does -110 mean?
You bet $110 to win $100. It implies a 52.38% chance, and it's the standard price on spreads and totals.
Is plus or minus the favourite?
Minus odds are the favourite and plus odds are the underdog.
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Updated 2026-10-26