Odds Converter
Convert between American, Decimal, and Fractional odds instantly. See the implied probability behind any betting line.
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Quick Examples
Understanding Odds Formats
American Odds (Moneyline)
American odds are the standard format at US sportsbooks. Positive numbers (e.g., +150) show how much profit you win on a $100 stake. Negative numbers (e.g., -110) show how much you need to stake to win $100 profit. A -110 line is the most common for point spreads and totals, reflecting the standard ~4.5% sportsbook margin (vig/juice).
Decimal Odds
Decimal odds are the global standard, used throughout Europe, Australia, and Canada. They represent the total return per $1 wagered, including your original stake. For example, 2.50 means a $1 bet returns $2.50 total ($1.50 profit + $1 stake). Decimal odds are the simplest to work with for calculations, which is why our tools convert to decimal internally.
Fractional Odds
Fractional odds are traditional in the UK and Ireland, particularly for horse racing. Expressed as a fraction like 5/2, the numerator is the profit and the denominator is the stake. So 5/2 means you win $5 profit for every $2 staked. "Evens" (1/1) means equal profit to stake.
Implied Probability
Every set of odds implies a probability of the outcome occurring. Calculated as 1 divided by the decimal odds, implied probability tells you what chance the sportsbook is pricing into the line. For example, -110 American odds equal approximately 52.38% implied probability. Comparing implied probability to your own estimated probability is the foundation of value betting.