Odds converter
Enter odds in any format to instantly see decimal, fractional and American equivalents, the implied probability and your potential returns.
- Implied probability
- 40.0%
- Decimal
- 2.50
- Fractional
- 3/2
- American
- +150
- Total return
- $25.00
A $10 bet returns $25.00, including $15.00 profit.
Tracking your bets? Members can log odds and closing prices in the bet journal.
Sign-up offers that accept odds of 2.50
Qualifying bets must be at or above each offer's minimum odds. 18+ · Ad.
Strikeline
Bet $10, Get $50 in Free Bets Min odds 1.50 (1/2)
18+. New customers. Min dep $10. Min odds 1.50 (1/2). Qualifying bet $10. Stake not returned. Free bets expire in 7 days. Full T&Cs apply.
Apex Odds
Bet $20, Get $40 + Enhanced odds Min odds 2.00 (Evs)
18+. New customers. Min dep $20. Min odds 2.00 (Evs). Qualifying bet $20. Stake not returned. Free bets expire in 7 days. Full T&Cs apply.
Pitchside
Get $30 in Free Bets when you bet $10 Min odds 1.80 (4/5)
18+. New customers. Min dep $10. Min odds 1.80 (4/5). Qualifying bet $10. Stake not returned. Free bets expire in 7 days. Full T&Cs apply.
Northstake
Up to $100 Money Back on your first bet Min odds 1.50 (1/2)
18+. New customers. Min dep $10. Min odds 1.50 (1/2). Refund as cash up to $100. Full T&Cs apply.
How to convert betting odds
Formulas
Fractional → decimal: (numerator ÷ denominator) + 1
American + → decimal: (odds ÷ 100) + 1
American − → decimal: (100 ÷ |odds|) + 1
Implied probability: 1 ÷ decimal × 100
Odds conversion table
| Decimal | Fractional | American | Implied probability |
|---|---|---|---|
| 1.50 | 1/2 | −200 | 66.7% |
| 1.80 | 4/5 | −125 | 55.6% |
| 2.00 | 1/1 (Evs) | +100 | 50.0% |
| 2.50 | 6/4 | +150 | 40.0% |
| 3.00 | 2/1 | +200 | 33.3% |
| 4.00 | 3/1 | +300 | 25.0% |
| 6.00 | 5/1 | +500 | 16.7% |
| 11.00 | 10/1 | +1000 | 9.1% |
For a full walkthrough — including how to calculate the bookmaker margin on any market — read betting odds explained, then learn to spot mispriced odds in our value betting guide.
Questions
Frequently asked questions
How do I convert decimal odds to fractional?
Subtract 1 from the decimal odds and express the result as a fraction. Decimal 2.50 minus 1 is 1.5, which is 3/2.
How do I convert American odds to decimal?
For positive American odds, divide by 100 and add 1 (+150 becomes 2.50). For negative odds, divide 100 by the odds without the minus sign and add 1 (−200 becomes 1.50).
What is implied probability?
Implied probability is the chance of an outcome suggested by the odds: 1 divided by the decimal odds. Odds of 4.00 imply a 25% chance.
Why do implied probabilities add up to more than 100%?
Because of the bookmaker's margin, or overround. The excess over 100% is the bookmaker's built-in edge on that market.
Gambling should stay fun
Set deposit limits before you play, never chase losses and take regular breaks. If gambling stops being enjoyable, free and confidential help is available 24/7.