About odds formats
Sportsbooks display the same betting line in different formats depending on the region. American odds use a plus or minus sign (+150, -110), decimal odds use a single number (2.50), and fractional odds use a ratio (3/2). They all describe the same wager — just written differently.
Enter a value, choose the format you typed it in, and the converter shows all three formats plus the implied win probability the line represents.
Frequently asked questions
What do American odds mean?
A positive number such as +150 shows the profit on a $100 bet. A negative number such as -110 shows how much you need to stake to profit $100.
What is implied probability?
It is the win percentage suggested by the odds. Decimal odds of 2.00 imply a 50% chance. It includes the sportsbook's margin, so it reads slightly higher than the true probability.
Which odds format is best?
They all represent the same thing. Decimal is the easiest for calculating payouts, American is standard in the United States, and fractional is traditional in the United Kingdom.