How to Convert Fractional Odds to American Odds?

convert fractional to american

Let’s look at how you can convert fractional odds to American odds.

Understanding American Odds

Fractional odds are commonly used in the UK and Ireland and represent the profit relative to the stake. American odds, on the other hand, are popular in the US and come in two forms: positive and negative. Positive American odds show how much profit you would make on a $100 stake, while negative American odds tell you how much you need to stake to make a $100 profit.

How to Convert Fractional Odds to American?


The method of converting fractional odds to American odds depends on whether the fractional odds are greater or less than 1.

  1. For Fractional Odds Greater Than 1 (e.g., 5/1): American Odds = 100 * Fractional Odds, or 100 * (numerator / denominator)
  2. For Fractional Odds Less Than 1 (e.g., 1/5): American Odds = -100/(Fractional Odds), or (-100 / 1)/(numerator / denominator)

Step-by-Step Conversion from Fractional Odds to American

Converting Odds Greater Than 1:

  • Fractional Odds: 5/2
  • American Odds: 100 * (5/2) = 500 / 2 = +250

Converting Odds Less Than 1:

  • Fractional Odds: 2/5
  • American Odds: (-100 / 1) / (2 / 5) = -250

Use our Fraction Odds to Decimal, American & Probability Converter

For a quicker, error-free conversion, use our online tool: Fraction Odds to Decimal, American, Probability (Converter), which seamlessly converts decimal odds to fractional, American odds, or even probability percentages.

Why Convert to Fractional Odds?

American odds provide a direct view of the return relative to a standardized stake (usually $100), making them popular in the US market.

Matej Šuľan

Fantasy Football enthusiast with two top 1k finishes in FPL. Best FPL overall rank: 119th in 2019/20 season. Five top 500 finishes in UCL Fantasy, best overall rank: 23rd in 2018/19 season. Founder of Fantasy Football Reports.

Leave a Comment

Your email address will not be published. Required fields are marked *