Odds Converter
Convert decimal, fractional and American odds instantly — and see the implied probability of any price.
Last updated
Quick answer
To convert fractional odds to decimal, divide the first number by the second and add 1 (5/2 = 3.50). For American odds, positive numbers show the profit on a 100 stake (+250 = 3.50 decimal); negative numbers show the stake needed to win 100 (-200 = 1.50 decimal).
Odds Converter
Free · no sign-up · calculates as you type
Odds conversion formulas
| To | Formula | Example (d = 2.50) |
|---|---|---|
| Fractional | (d − 1) as a fraction | 3/2 |
| American, d ≥ 2 | +(d − 1) × 100 | +150 |
| American, d < 2 | −100 ÷ (d − 1) | (e.g. 1.50 → −200) |
| Implied probability | 1 ÷ d | 40.0% |
| [/ybw_table] | ||
| Common prices | ||
| [ybw_table] | ||
| Fractional | Decimal | American |
| 1/2 | 1.50 | −200 |
| Evens | 2.00 | +100 |
| 6/4 | 2.50 | +150 |
| 2/1 | 3.00 | +200 |
| 3/1 | 4.00 | +300 |
| 10/1 | 11.00 | +1000 |
Frequently asked questions
What does +150 mean in betting?
+150 American odds means a 100 stake wins 150 profit. It equals 2.50 in decimal and 6/4 (3/2) in fractional odds.
What does -200 mean?
You must stake 200 to win 100 profit. It equals 1.50 decimal and 1/2 fractional.
What are evens?
Evens means you win the same amount you stake: 2.00 decimal, 1/1 fractional or +100 American.