Odds Converter
UK bookmakers quote fractional odds, exchanges use decimal, and US sites use American (moneyline). This converter turns any one into the others and shows the implied probability.
Worked example
5/2 = 3.50 decimal = +250 American, and implies 1 / 3.5 = 28.57% chance. 4/9 = 1.444 decimal = −225 American (69.23%).
FAQs
How do I convert fractional odds to decimal?
Divide the top number by the bottom and add 1: 5/2 → 2.5 + 1 = 3.5.
What is implied probability?
100 divided by the decimal odds. Adding these across a market shows the bookmaker margin (overround).
What does evens mean?
1/1 or 2.0 decimal: you double your stake if it wins.
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