Odds Converter
Free · no sign-up · updated 10 Nov 2026
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Odds Converter
Type a price in any format. The other formats and the implied probability update as you type.
Fractional—
Decimal—
American—
Implied probability—
Returns—
Figures are estimates for guidance only. 18+, please gamble responsibly — BeGambleAware.org.
Why the percentages add up to more than 100
Price up a football match and the three implied probabilities will total something like 105%. That extra 5% is the margin — the bookmaker's built-in edge. The tighter the market, the smaller it is, which is why comparing prices matters more than any single conversion.
Quick reference
The table above lists the prices you will meet most often in all three formats, with the implied chance alongside. Evens is 2.00 or +100 and implies 50%.
FAQ
How do I convert fractional odds to decimal?
Divide the first number by the second and add one. 5/2 becomes 5 ÷ 2 + 1 = 3.50.
What do American odds mean?
A positive number is the profit on a 100 stake: +250 means 250 profit from 100. A negative number is the stake needed to win 100: −200 means you stake 200 to win 100.
Do the odds show my true chance of winning?
No. Implied probability includes the bookmaker margin, so the implied chances across all outcomes add up to more than 100%. The overround is the difference.
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