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Odds Converter

Convert between decimal, fractional, American odds, and implied probability — live in any field.

Enter any value to convert all formats

Decimal Odds (e.g. 2.50)

Fractional Odds (e.g. 3/2)

American Odds (e.g. +150 or −200)

Implied Probability (%)

Converted Values

Decimal—

Fractional—

American—

Implied Probability—

Decimal: stake × odds = return (includes stake)
Fractional: profit/stake ratio
American +150: bet $100 to win $150
American −200: bet $200 to win $100
Note: 0% and 100% probability have undefined odds.

p = 1/decimal · p = b/(a+b) · p = 100/(am+100) [+]