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Odds Calculator

Convert between American, Decimal, and Fractional odds. Calculate implied probability and potential payouts.

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Master the Math of Betting

Sports betting odds can be confusing! Our Odds Calculator translates between the three major formats: American (+150), Decimal (2.50), and Fractional (3/2). Whether you're watching UK horse racing or US football, this tool ensures you understand exactly what the bookmaker is offering. Instantly convert any format to see your potential profit and total payout on a standard wager.

Implied Probability Explained

The most important number in betting isn't the payout—it's the implied probability. This percentage represents how often you need to win for the bet to break even. If the implied probability is 60% but you think the team has a 70% chance to win, you've found "value." This calculator reveals that hidden percentage instantly, helping you make smarter, more analytical decisions.

History Fact: Fractional odds date back to the 18th century in the UK, while Decimal odds are standard in Europe and Australia because they are easier to multiply for accumulators (parlays).

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