Calculators / Odds converter
Odds converter
One price in, every format out — American, decimal, fractional and the probability the bookmaker is quoting you.
The next step
in sports analysis.
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Input
Fractions take a slash: 5/2. American odds take a sign: +150 or −120.
Every format
American
Decimal
Fractional
Implied probability
How it works
Decimal odds are the anchor: they state total return per dollar staked, so probability is simply one divided by the decimal price.
Positive American odds are profit on $100; negative American odds are the stake needed to profit $100. Fractions are profit over stake, which is decimal minus one.
Common prices
| Decimal | American | Fraction | Probability |
|---|---|---|---|
| 1.50 | −200 | 1/2 | 66.7% |
| 1.91 | −110 | 10/11 | 52.4% |
| 2.00 | +100 | 1/1 | 50.0% |
| 2.50 | +150 | 3/2 | 40.0% |
| 4.00 | +300 | 3/1 | 25.0% |