Expected Value Calculator

Calculate the mathematical edge of a bet based on true probability.

JavaScript Required: This calculator requires JavaScript to run the logic entirely in your browser. However, the core concept works mathematically. For example, American odds of +150 equate to Decimal odds of 2.50, Fractional odds of 3/2, and an implied probability of 40%.

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How it works

This tool uses standardized mathematical formulas to compute values locally in your browser. No data is sent to a server. We escape all inputs to prevent DOM injection.

Expected Value Calculator

How it works

Internal Resources