Implied Probability Calculator
An implied probability calculator converts a sportsbook price into the win rate needed to break even before considering market margin. American −110 corresponds to 52.38%, while +150 corresponds to 40%. In a complete market, the outcomes often sum above 100% because the bookmaker’s vig is still included.
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Implied probability is the break-even win rate baked into the odds. If the sportsbook offers -110, the implied probability is about 52.4%—you need to win that often just to break even. This calculator converts any American or decimal odds into implied probability in one click.
Use it to compare your estimated win chance to the market's price and spot +EV opportunities.