How to Convert American Odds to Fractional?

convert american to fractional

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

Understanding American & Fraction Odds

American odds are predominantly used in the US and are either positive or negative. Positive odds indicate how much profit you would earn on a $100 stake, while negative odds show how much you need to stake to win $100. Fractional odds, commonly used in the UK and Ireland, display the potential profit relative to the stake.

How to Convert American Odds to Fractional?


The method to convert American odds to fractional odds depends on whether the odds are positive or negative:

For Positive American Odds:

  • Fractional Odds = American Odds / 100. Then simplify if necessary.

For Negative American Odds:

  • Fractional Odds = 100 / (ABS(American Odds)). Then simplify if necessary.

Step-by-Step Conversion from American Odds to Franctional

Converting Positive American Odds:

  • American Odds: +350
  • Fractional Odds: 350 / 100 = 3.5 / 1 = 7 / 2 (after simplification)

Converting Negative American Odds:

  • American Odds: -350
  • Fractional Odds: 100/(ABS(-350)) = 100 / 350 = 1 / 3.5 = 2 / 7 (after simplification)

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.

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