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Market Pricing

Implied Probability Calculator

Implied probability translates a quoted price into the break-even percentage represented by that price. Enter odds or a probability to convert in either direction.

Price inputs

Live

Enter any odds format or an implied probability. The other fields update automatically.

%

Converted price

Live

Implied probability

60.00%

Prediction-market equivalent60.00¢
American odds-150
Decimal odds1.667
Fractional odds2/3
Payout multiplier1.667×

Method and assumptions

How to use this calculator

Implied probability translates a quoted price into the break-even rate represented by that price. You can also enter a probability to convert it back into equivalent American, decimal, and fractional odds.

Common conversions

American +150, decimal 2.50, fractional 3/2, and a 40% implied probability all represent the same price. A 40¢ prediction-market contract represents the same simple probability before fees.

Margin is still present

Implied probability is not automatically a fair forecast. In multi-outcome markets, use the no-vig calculator to normalize all listed outcomes.

Keep checking the math

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Calculator results are informational estimates based on the values entered. They do not guarantee an outcome. Confirm current prices, rules, fees, liquidity, limits, and eligibility on the relevant platform.