Odds Converter
Convert between fraction, decimal, American, and implied probability in one row — type in any column and the rest update instantly.
Enter your odds
Converts automatically — type in any column (fraction, decimal, American, or implied %).
| Fraction | Decimal | American (moneyline) | Implied probability |
|---|---|---|---|
% |
Frequently Asked Questions
What are the different odds formats?
American odds use +/- notation (e.g. +150 or -200), decimal odds represent total return per $1 wagered (e.g. 2.50), and fractional odds show profit relative to stake (e.g. 3/2). All three represent the same underlying probability.
How do I convert American odds to decimal?
For positive American odds, divide by 100 and add 1 (e.g. +150 → 2.50). For negative odds, divide 100 by the absolute value and add 1 (e.g. -200 → 1.50).
What is implied probability?
Implied probability is the win percentage the odds suggest. It is derived from the odds and includes the bookmaker's margin. For example, -200 implies a 66.7% chance of winning.
Why does implied probability matter?
Implied probability lets you compare the sportsbook's price to your own estimate of an outcome's likelihood. If your estimated probability is higher than the implied probability, the bet may have positive expected value.
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