Odds Sports Calculator
Type any odds and instantly see all the other formats.
How to Use This Calculator
- Pick the odds format you’d like to enter (Decimal, Fractional, or American)
- Type the odds value into the input box
- See the matching odds in all three formats along with 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 do the exact same conversion. This one is a stripped-back version built purely for fast odds conversion, without the extra bells and whistles.
Which odds format do people use most?
Decimal odds are the norm across Europe and Australia, Fractional odds are the classic choice in the UK and Ireland, and American odds are mainly used in the United States.
How do I change American odds into Decimal?
For plus American odds, divide by 100 and add 1. For minus American odds, divide 100 by the absolute value and add 1. So +150 turns into 2.50 and -200 turns into 1.50.