Free tools
Odds converter: decimal, fractional & American
Type a price in any format and the others update instantly. Decimal odds are standard in Czechia, Slovakia and Poland; fractional odds are common in the UK and Ireland, American odds in North America.
Type in any field. The others update as you type.
Common odds
| Decimal | Fractional | American | Implied probability% |
|---|---|---|---|
| 1.10 | 1/10 | −1000 | 90.9% |
| 1.20 | 1/5 | −500 | 83.3% |
| 1.25 | 1/4 | −400 | 80.0% |
| 1.33 | 1/3 | −303 | 75.2% |
| 1.40 | 2/5 | −250 | 71.4% |
| 1.50 | 1/2 | −200 | 66.7% |
| 1.67 | 4/6 | −149 | 59.9% |
| 1.80 | 4/5 | −125 | 55.6% |
| 1.91 | 10/11 | −110 | 52.4% |
| 2.00 | 1/1 | +100 | 50.0% |
| 2.10 | 11/10 | +110 | 47.6% |
| 2.25 | 5/4 | +125 | 44.4% |
| 2.50 | 6/4 | +150 | 40.0% |
| 2.75 | 7/4 | +175 | 36.4% |
| 3.00 | 2/1 | +200 | 33.3% |
| 3.50 | 5/2 | +250 | 28.6% |
| 4.00 | 3/1 | +300 | 25.0% |
| 5.00 | 4/1 | +400 | 20.0% |
| 6.00 | 5/1 | +500 | 16.7% |
| 8.00 | 7/1 | +700 | 12.5% |
| 10.0 | 9/1 | +900 | 10.0% |
| 21.0 | 20/1 | +2000 | 4.8% |
The three formats
- Decimal
- The total return per unit staked, stake included. A price of 2.50 returns 2.50 for every 1 staked.
- Fractional
- The profit per unit staked. 6/4 means 6 profit for every 4 staked, the same as decimal 2.50.
- American
- Positive numbers show the profit on a 100 stake (+150); negative numbers show the stake needed to win 100 (−200).
- Implied probability
- 1 ÷ decimal price. A price of 2.50 implies 40%.
Formulas
decimal = 1 + numerator ÷ denominator
decimal = 1 + American ÷ 100 (American ≥ +100)
decimal = 1 + 100 ÷ |American| (American ≤ −100)
Fractions follow the conventional ladder bookmakers use (for example 11/10 rather than 21/19), so a converted fraction may be rounded slightly.