Betting Odds Converter

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Our odds converter allows you to enter your odds in one format (American, Fractional, or Decimal) and it will show you your odds in the other formats as well as the Implied Probability of winning. 

Simply fill out the bet amount and odds in any one format and our calculator will show you the results!

Odds Converter

Enter in your bet amount and the odds below to see how much you would win and what your odds are in American, Fractional, and Decimal formats as well as the implied probability of winning.

To Win

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To Pay

$0.00

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If you want to convert between odds by hand (or calculator), you can use the following formulas:

Convert American Odds to Decimal:

  • Positive odds: 1 + (American Odds/100)
  • Negative odds: 1 – (100/American Odds)

Convert American Odds to Fractional: 

  • Positive odds: American Odds/100
  • Negative odds: -100/American Odds

Convert Fractional Odds to American:

  • Odds > 1: Fractional Odds x 100
  • Odds < 1: -100/Fractional Odds

Convert Fractional Odds to Decimal:

  • 1 + Fractional Odds

Convert Decimal Odds to American: 

  • Odds > 2: (Decimal Odds – 1) x 100
  • Odds < 2: -100/(Decimal Odds – 1)

Convert Decimal Odds to Fractional:

  •  Decimal Odds – 1

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Dave Rathmanner

Dave Rathmanner is the Founder & CEO of Odds Assist. After struggling to find helpful sports betting resources and honest reviews when he first started betting, he decided to create the site he always wished he had. Dave has been betting on sports since NJ legalized it in 2018 and regularly analyzes sportsbooks to find the best options for bettors. Aside from creating new content for OA readers, Dave is also passionate about researching betting markets, creating models, and developing profitable betting strategies.