Odds converter
Convert a betting price across American, decimal, fractional, and implied probability formats. This keeps odds comparisons on the same scale.
Moneyline-style display.
Total return multiplier.
Chance implied by the price.
| American | +150 |
|---|---|
| Decimal | 2.50 |
| Fractional | 3/2 |
| Implied probability | 40.00% |
Convert one price into every common format
Pick the input format
Choose the format you are starting with: American, decimal, fractional, or probability.
Enter the price
Use examples like +150, -200, 2.50, 3/2, or 40%.
Compare the outputs
Review the same price across formats before using it in payout or no-vig math.
How odds conversion works
American to decimal
Positive odds: odds / 100 + 1. Negative odds: 100 / absolute odds + 1.
Decimal to probability
Probability = 1 / decimal odds. A 2.50 price implies 40.00%.
Fractional to decimal
Decimal odds = numerator / denominator + 1. A 3/2 price becomes 2.50.
Odds converter questions
What does an odds converter do?
An odds converter translates the same betting price between American, decimal, fractional, and implied probability formats.
What is +150 in decimal odds?
+150 converts to 2.50 decimal odds, 3/2 fractional odds, and 40.00% implied probability.
What is -200 in decimal odds?
-200 converts to 1.50 decimal odds, 1/2 fractional odds, and 66.67% implied probability.
Does converting odds remove vig?
No. Odds conversion changes the display format of a price. To remove sportsbook margin from a full market, use a no-vig calculator.
Use converted odds in the next calculation
Betting payout calculator
Use the converted odds with a stake to estimate profit and return.
Implied probability calculator
Focus on the percentage chance represented by a listed price.
No-vig fair odds calculator
Remove market margin from all sides of a market.
Converting odds does not make a bet safer or better. It only changes how the same listed price is displayed.