Odds Converter

Convert between decimal, fractional, American, and implied probability odds formats. Calculate house edge.

Choose the format you want to enter. Decimal (e.g., 2.50), Fractional (e.g., 3/2), American (+150 or -200), or Implied Probability (e.g., 40%).
Enter your odds in the selected format. For fractional, use format like 3/2. For American, include + or - sign.
Enter bet amount to see potential payout and profit.

All Formats

Decimal Odds
Fractional Odds
American Odds
Implied Probability
References: Decimal = 1 + (num/den). American: positive = (decimal-1)×100, negative = -100/(decimal-1). Implied probability = 1/decimal. Overround = sum of implied probabilities − 100%.