Quick Odds Tool
Type odds in any format and see every equivalent at once — decimal, fractional, American.
How to Use This Calculator
- Pick the odds format you’ll enter: Decimal, Fractional, or American
- Type the odds value into the input field
- Read the equivalents in all three formats plus the implied probability
Formula
Decimal to Fractional: (Decimal - 1) expressed as a simplified fraction
Decimal to American:
- If Decimal >= 2.00: American = (Decimal - 1) × 100
- If Decimal < 2.00: American = -100 / (Decimal - 1)
Implied Probability: 1 / Decimal Odds × 100%
Frequently Asked Questions
How is this different from the Betting Odds Calculator?
Both run the same conversion. This is the stripped-down version, built for fast odds conversion with no extra features.
Which odds format is most common?
Decimal odds are the norm in Europe and Australia, Fractional odds are traditional across the UK and Ireland, and American odds dominate in the United States.
How do I convert American odds to Decimal?
Positive American odds: divide by 100, add 1. Negative American odds: divide 100 by the absolute value, add 1. For instance, +150 becomes 2.50 and -200 becomes 1.50.