Odds converter

Odds converter

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Odds formatAmerican (-110, +150)Decimal (1.91, 2.50)

Odds

American

-110

Decimal

1.909

Implied probability

52.38%

Includes the sportsbook's margin

Assumptions and limitations

• Implied probability is 1 ÷ decimal odds. It includes the bookmaker margin (vig), so both sides of a market usually add up to more than 100%.
• To estimate fair probabilities, remove the margin with the no-vig calculator.
• Nothing you enter is stored or sent anywhere.

How the conversion works

Going back from decimal to American: odds of 2.00 or more become +(decimal − 1) × 100; odds below 2.00 become −100 ÷ (decimal − 1).

What implied probability does and doesn't tell you

Implied probability is what a price says about the chance of an outcome, including the sportsbook's margin. That's why the two sides of a market usually add up to more than 100%. To estimate the fair probability without the margin, use the no-vig calculator.