Odds Betting Calculator
Any odds format in; all equivalents out.
How to Use This Calculator
- Pick the odds format to enter: Decimal, Fractional, or American
- Type the odds value into the input field
- Read the equivalent odds in all three formats, plus 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 does this differ from the Betting Odds Calculator?
Both run the identical conversion. This is the trimmed version, focused solely on fast odds conversion with no extra features.
Which odds format dominates?
Decimal odds are standard across Europe and Australia; Fractional odds remain traditional in the UK and Ireland; American odds prevail in the United States.
Converting American odds to Decimal?
Positive American odds: divide by 100, add 1. Negative American odds: divide 100 by the absolute value, add 1. So +150 yields 2.50 and -200 yields 1.50.