Odds Converter
Convert betting odds between American, decimal, and fractional formats instantly. Also shows implied probability.
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Understanding Betting Odds Formats
Different sportsbooks and regions use different odds formats. American odds are the standard in the US, decimal odds are common in Europe and Australia, and fractional odds are traditional in the UK.
American Odds
Positive odds (+150) show how much profit you win on a $100 bet. Negative odds (-110) show how much you need to bet to win $100 profit.
Decimal Odds
Decimal odds represent the total return per $1 wagered, including the stake. Odds of 2.50 mean a $1 bet returns $2.50 total ($1.50 profit + $1 stake).
Fractional Odds
Fractional odds (like 3/2) show profit relative to stake. A 3/2 bet pays $3 profit for every $2 wagered.
Frequently Asked Questions
How do you convert American odds to decimal odds?
For positive American odds, divide by 100 and add 1. So +150 becomes 2.50 in decimal. For negative American odds, divide 100 by the absolute value and add 1. So -110 becomes 1.909 in decimal. Decimal odds represent your total return per dollar wagered, including your original stake.
What are fractional odds and how do they work?
Fractional odds, common in the UK, show your profit relative to your stake. Odds of 3/2 mean you win $3 for every $2 you bet. To convert fractional odds to decimal, divide the numerator by the denominator and add 1. So 3/2 becomes 2.50 in decimal format.
What does +150 mean in sports betting?
American odds of +150 mean you would win $150 in profit on a $100 bet, for a total return of $250. Positive odds always indicate the underdog. The higher the positive number, the bigger the underdog and the larger the potential payout relative to your stake.
What does -110 mean in sports betting?
American odds of -110 mean you need to bet $110 to win $100 in profit. Negative odds indicate the favorite. The -110 line is the most common in sports betting because it is the standard price on point spreads and totals, reflecting the sportsbook's built-in vig.
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