Odds Formats Explained: American, Decimal, and Fractional
Convert between American, decimal, and fractional odds and understand what each format implies for potential payout.
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Sportsbooks show the same price in different formats depending on region. Understanding all three helps you compare lines faster.
Decimal odds
Common in Europe and many online books. A price of 2.50 means a $10 stake returns $25 total ($15 profit + stake).
American odds
- +150: a $100 stake wins $150 profit
- -120: you risk $120 to win $100 profit
Negative favorites can look intimidating until you convert them to decimal or implied probability.
Fractional odds
Popular in the UK. 5/2 means $5 profit on a $2 stake. Convert to decimal by dividing and adding 1.
Try the Odds Converter to switch formats instantly.
Tip for sharper reading
Compare implied probability, not just the pretty number. That keeps your attention on value instead of presentation.
About the author
Reviewed under our editorial policy. Gambling content is educational—see responsible gambling.
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