Odds converter: decimal, fractional, American and probability
Type a price in whatever format you have and see it in the other three. Handy when comparing UK, US and European bookmakers.
The four formats
Decimal (2.50): what you get back per 1 staked, stake included. The standard in Europe.
Fractional (3/2): profit per unit staked, stake not included. The classic UK format.
American (+150 / −200): with a plus sign, what you win staking 100; with a minus sign, what you must stake to win 100.
Implied probability (40%): 1 ÷ decimal odds. It includes the bookmaker margin; to remove it use the fair odds calculator.
Frequently asked questions
How do I convert fractional odds to decimal? Divide and add 1: 3/2 = 1.5 + 1 = 2.50.
How do I convert American odds to decimal? If positive, divide by 100 and add 1 (+150 = 2.50). If negative, divide 100 by the number without its sign and add 1 (−200 = 1.50).
What is implied probability? The probability a price stands for: 1 ÷ decimal odds. At 2.50 it is 40%.
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