Free Odds Converter
Convert between American, decimal, and fractional odds instantly. Type in any format and see all three — plus implied probability.
Enter odds in any format above to see instant conversions and implied probability.
Understanding Betting Odds Formats
American Odds (Moneyline)
The standard in the U.S. Negative odds (-110) show how much you must wager to win $100. Positive odds (+200) show how much you win on a $100 bet. The further from zero, the stronger the favorite or underdog.
Decimal Odds
Popular in Europe and Australia. The number represents your total return per $1 wagered, including your stake. Decimal 2.50 means a $10 bet returns $25 total. Easy to compare — the higher the number, the bigger the underdog.
Fractional Odds
Traditional in the UK. Written as a fraction (e.g., 3/2), the numerator is your profit and the denominator is your stake. Odds of 3/2 mean you profit $3 for every $2 wagered, plus your $2 stake back.
Quick Conversion Reference
| American | Decimal | Fractional | Implied Prob. |
|---|---|---|---|
| -500 | 1.20 | 1/5 | 83.3% |
| -200 | 1.50 | 1/2 | 66.7% |
| -150 | 1.67 | 2/3 | 60.0% |
| -110 | 1.91 | 10/11 | 52.4% |
| +100 | 2.00 | 1/1 | 50.0% |
| +150 | 2.50 | 3/2 | 40.0% |
| +200 | 3.00 | 2/1 | 33.3% |
| +300 | 4.00 | 3/1 | 25.0% |
| +500 | 6.00 | 5/1 | 16.7% |
| +1000 | 11.00 | 10/1 | 9.1% |
Odds Converter FAQ
What are American odds?
American odds (moneyline odds) use + or - signs. Negative odds like -110 tell you how much to bet to win $100. Positive odds like +200 tell you how much you win on a $100 bet. They are the standard format at U.S. sportsbooks.
What are decimal odds?
Decimal odds represent total payout per $1 wagered, including your stake. Odds of 2.50 mean a $1 bet returns $2.50 total. They are the standard in Europe, Australia, and Canada.
What are fractional odds?
Fractional odds show potential profit relative to your stake. Odds of 3/2 mean you win $3 for every $2 wagered. They are the traditional format in the UK and Ireland.
How do I convert between odds formats?
American to decimal: positive odds / 100 + 1, negative odds 100 / |odds| + 1. Decimal to fractional: subtract 1 and express as fraction. Implied probability: 1 / decimal odds. Use our converter above for instant results.
Use These Odds On Today’s Picks
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