Betting Odds Converter
Convert odds between American, Decimal, and Fractional formats
American
-110
Decimal
1.91
Fractional
10/11
Implied Probability
52.4%
American Odds
Used in US sportsbooks. Positive (+) shows profit on $100 bet. Negative (-) shows stake needed to win $100.
Decimal Odds
Popular in Europe. Multiply stake by decimal to get total return (including original stake).
Fractional Odds
Traditional UK format. Shows profit relative to stake (e.g., 3/1 means $3 profit per $1 staked).
How to Convert Betting Odds
Different sportsbooks and regions use different odds formats. Our odds converter instantly translates between American (moneyline), Decimal, and Fractional odds so you can compare lines across any sportsbook.
Odds Conversion Formulas
American to Decimal
- Positive American: Decimal = (American / 100) + 1
- Negative American: Decimal = (100 / |American|) + 1
Example: +150 → (150 / 100) + 1 = 2.50 decimal
Example: -150 → (100 / 150) + 1 = 1.67 decimal
Decimal to American
- Decimal ≥ 2.00: American = (Decimal - 1) × 100
- Decimal < 2.00: American = -100 / (Decimal - 1)
Example: 2.50 → (2.50 - 1) × 100 = +150
Example: 1.67 → -100 / (1.67 - 1) = -149
Fractional to Decimal
Decimal = (Numerator / Denominator) + 1
Example: 3/2 → (3 / 2) + 1 = 2.50 decimal
Why Convert Odds?
Converting odds helps you compare lines across different sportsbooks that may display odds in different formats. It also helps you understand the true implied probability of any bet, regardless of how the odds are displayed.
