Odds converter
Convert between decimal, fractional and American odds, and see the implied probability.
Try it
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Runs in your visitor's browser. It needs no key or account and sends nothing anywhere.
How it works
Pick the format you have and type the price. The converter shows it in every format at once, with the implied probability. It takes fractions like 11/4 and American odds like +150.
Questions
How do you convert decimal odds to a probability?
Implied probability is 1 ÷ decimal odds: 2.0 is 50% and 4.0 is 25%. A bookmaker's prices include its margin, so the probabilities for one market add up to more than 100%.
Why does 1.91 show as 91/100?
The converter gives the exact fraction of the decimal price. Bookmakers quote some prices as a familiar fraction instead, so 10/11 (1.909) is usually shown where you see 1.91.
How do American odds work?
Positive American odds show the profit on a stake of 100 (+150 → 2.5 decimal). Negative odds show the stake needed to win 100 (−200 → 1.5 decimal).
Related
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