Betting Odds Calculator

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Our betting odds calculator can show you your expected payout based on your bet amount and odds, as well as what your odds are in other formats and your implied probability of winning. 

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

Betting Odds Calculator

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


To Pay


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If you want to learn more about how to read odds and calculate payouts in each odds format, check out our How to Read Betting Odds Guide.

While we go into more information in that guide, here are the payout formulas (profit; not total payout which would include the amount wagered) for each betting odds format:

  • Calculate winnings from American Odds (Favorite): Winnings =  Amount Bet / (Odds/-100)
  • Calculate winnings from American Odds (Underdog): Winnings =  Amount Bet * Odds / 100
  • Calculate winnings from Fractional Odds: Winnings = Amount Bet * Odds
  • Calculate winnings from Decimal Odds: Winnings = (Amount Bet * Odds) – Amount Bet

To calculate implied probability, you can use the following formulas:

  • Calculate implied probability from American Odds (Favorite): Implied Probability = -Odds / (-Odds + 100)
  • Calculate implied probability from American Odds (Underdog): Implied Probability = 100 / (Odds + 100)
  • Calculate implied probability from Fractional Odds: Implied Probability = Denominator of Odds / Denominator of Odds + Numerator of Odds
  • Calculate implied probability from Decimal Odds: Implied Probability = 1 / Odds

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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.