How Do You Read and Convert Sports Betting Odds?

Sports betting can be an exhilarating hobby and a potential source of income for many, but it all begins with understanding how to read and interpret betting odds. Odds not only reflect the likelihood of various outcomes but also guide bettors on potential winnings.

This article breaks down the basics of reading sports betting odds and explains how to convert between the most common odds formats: American, Decimal, and Fractional.

What Are Sports Betting Odds?

Sports betting odds are numerical expressions used in betting to indicate the probability of certain outcomes. They also determine the amount of money you can win relative to your wager. Understanding these odds is crucial for making informed betting decisions.

Types of Odds Formats

There are three primary types of odds formats used in sports betting: American, Decimal, and Fractional. Each format represents the potential return on a bet differently but can be converted from one to another with simple calculations.

1. American Odds - American odds are presented with a plus (+) or minus (-) sign. A plus sign indicates how much a $100 bet would win if betting on an underdog, whereas a minus sign shows how much one needs to bet to win $100 if betting on a favorite. - Example: +150 means you win $150 on a $100 bet. -150 means you need to bet $150 to win $100.

2. Decimal Odds - Decimal odds represent the amount one wins for every $1 wagered, including the original bet. They are widely used outside North America, especially in Europe and Australia. - Example: 2.50 means for every $1 bet, the total return would be $2.50 if the bet wins.

3. Fractional Odds - Common in the UK and Ireland, fractional odds show the potential profit won relative to the stake. - Example: 5/2 (or five to two) means for every $2 bet, you would win $5 if the bet is successful.

Odds Formats

Understanding each type of odds format allows bettors to assess the risk and potential reward quickly:

• American Odds: Focus on the plus and minus signs. Minus (-) indicates how much you need to bet to win $100, and plus (+) shows how much you'd win from a $100 bet

• Decimal Odds: Simply multiply your stake by the decimal figure. The result is your total payout (stake plus profit)

• Fractional Odds: Multiply your bet by the top number (numerator), then divide by the bottom number (denominator) to find your winnings

Converting Odds Between Formats

Converting odds from one format to another is straightforward with basic math:

From American to Decimal

• Positive American Odds: Add 100 to the American odds, divide by 100, then add 1. (e.g., +150 becomes 2.50)

Negative American Odds

• Divide 100 by the absolute value of the American odds, then add 1. (e.g., -150 becomes 1.67)

From Decimal to Fractional

• Subtract 1 from the Decimal odds, then convert the result to the simplest fractional form. (e.g., 2.50 becomes 1.5, which simplifies to 3/2)

From Fractional to Decimal

• Divide the top number by the bottom number and add 1. (e.g., 5/2 becomes 3.50)

From Any to American

• If the decimal odds are greater than 2.00, subtract 1, multiply by 100, and put a plus sign. (e.g., 2.50 becomes +150)

• If the decimal odds are less than 2.00, subtract 1, divide 100 by the result, put a minus sign, and round off. (e.g., 1.67 becomes -150)

Odds Calculator

For a great odds converter, check out OddsJam’s Betting Odds Converter & Probability Calculator and use the code inplaylive15 for a lifetime 15% off discount.

Final Thoughts

Reading and converting sports betting odds are essential skills for any bettor. With practice, these conversions become second nature, allowing you to quickly evaluate the value in different betting markets, regardless of the format used.