Universal Odds Calculator
Enter a price in any format and read every equivalent instantly.
How to Use This Calculator
- Choose the format you intend to input: Decimal, Fractional, or American
- Enter the odds value into the input field
- Read the equivalent odds 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 does this differ from the Betting Odds Calculator?
Both run the identical conversion. This is a pared-down version built purely for fast odds conversion, with no extra features attached.
Which odds format sees the most use?
Decimal odds are the norm across Europe and Australia, Fractional odds are the traditional standard in the UK and Ireland, and American odds dominate in the United States.
What is the formula to convert American odds to Decimal?
Positive American odds: divide by 100 and add 1. Negative American odds: divide 100 by the absolute value and add 1. So +150 resolves to 2.50 and -200 resolves to 1.50.