Odds Calculator & Converter
Convert American, decimal and fractional betting odds in seconds with our free odds calculator. Enter any betting price to see its equivalent in all three formats, along with the implied probability and potential winnings.
Odds calculator
Convert American, decimal, or fractional odds and estimate the potential return on your stake.
- Total return
- –
- Potential profit
- –
- Implied probability
- –
- American odds
- –
- Decimal odds
- –
- Fractional odds
- –
Total return includes your stake. Implied probability reflects the odds, not a prediction of the outcome. Figures are rounded estimates.
How to Use Our Odds Calculator
-
Choose your odds format
Select American, decimal or fractional odds.
-
Enter the odds
Type the price you want to convert, such as +150, 2.50 or 3/2.
-
Enter your stake
Add the amount you want to bet in the Stake (USD) field.
-
Check your results
Your potential winnings, implied probability and converted odds update instantly.
| Result | What it means |
|---|---|
| Total return | Your full payout if the bet wins, including your original stake. |
| Potential profit | How much you win after subtracting your stake. |
| Implied probability | The break-even win percentage represented by the odds. |
| American odds | The price expressed as +150 or -110. |
| Decimal odds | The same price expressed as a number, such as 2.50. |
| Fractional odds | The price expressed as a fraction, such as 3/2. |
American vs Decimal vs Fractional Odds
Betting odds can look different depending on the sportsbook, but all three formats represent the same potential payout.
- American odds are standard in the US. Positive odds show how much profit you’d make on a $100 bet, while negative odds show how much you need to wager to win $100.
- Decimal odds show your total return for every $1 wagered, including your stake. Multiply the decimal odds by your stake to calculate the payout.
- Fractional odds show potential profit relative to your stake. Odds of 3/1 mean you could win $3 for every $1 wagered.
Comparison different types of odds
| American | Decimal | Fractional | Implied probability |
|---|---|---|---|
| -200 | 1.50 | 1/2 | 66.67% |
| -150 | 1.67 | 2/3 | 60.00% |
| -110 | 1.91 | 10/11 | 52.38% |
| +100 | 2.00 | 1/1 | 50.00% |
| +150 | 2.50 | 3/2 | 40.00% |
| +200 | 3.00 | 2/1 | 33.33% |
| +300 | 4.00 | 3/1 | 25.00% |
What Is Implied Probability?
Implied probability is the chance of winning represented by the betting odds. It helps you understand how likely an outcome needs to be for a bet to offer value.
For example, +150 odds have an implied probability of 40%. If you consistently win more than 40% of your bets at those odds, you’d make a profit over time.
For better comparisons, you can use our No-Vig Calculator to remove that margin and estimate fair odds.