Odds Converter: American, decimal, fractional and implied probability
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Common conversions
| American | Decimal | Fractional | Implied |
|---|---|---|---|
| −200 | 1.50 | 1/2 | 66.7% |
| −110 | 1.91 | 10/11 | 52.4% |
| +100 | 2.00 | 1/1 | 50.0% |
| +150 | 2.50 | 3/2 | 40.0% |
| +400 | 5.00 | 4/1 | 20.0% |
How it's calculated
Plus odds: decimal = 1 + odds ÷ 100. Minus odds: decimal = 1 + 100 ÷ |odds|. Fractional is decimal − 1 as a fraction.
Implied probability is 1 ÷ decimal odds. It includes the book's margin, so both sides of a bet add up to more than 100%.
Questions
What does +400 mean?
A $100 bet at +400 wins $400 in profit and pays $500 back, stake included.
What does −150 mean?
You risk $150 to win $100 in profit, so a winning $150 bet pays $250 back.
What is implied probability?
It's 1 ÷ the decimal odds: how often the price says the outcome happens. It includes the book's margin, so both sides of a bet add up to more than 100%.
For education and entertainment. Not betting advice. 21+. If betting stops being fun: Call or text 1-800-MY-RESET.