Odds Converter
Convert betting odds between American, Decimal, and Fractional formats. Calculate implied probability and potential payouts instantly.
Odds Converter
Convert between American, Decimal, and Fractional odds formats
Enter positive (+150) or negative (-110) odds
Formula
American to Decimal: If positive: (odds/100)+1, If negative: (100/|odds|)+1Different regions use different odds formats. This tool converts between all three major formats.
How to Use
- 1Select format — Choose the odds format you want to convert from (American, Decimal, or Fractional).
- 2Enter odds — Input the odds value in your selected format.
- 3Enter stake — Optionally enter your stake amount to see potential payouts.
- 4View results — See the odds converted to all formats plus implied probability.
Frequently Asked Questions
What are American odds?
American odds show how much you win on a $100 bet (positive odds like +150) or how much you need to bet to win $100 (negative odds like -110). Positive odds indicate the underdog, negative odds indicate the favorite.
What are Decimal odds?
Decimal odds represent the total payout per unit staked, including your original stake. For example, 2.50 means you get $2.50 back for every $1 bet (including your $1 stake, so $1.50 profit).
What are Fractional odds?
Fractional odds (like 3/2) show the profit relative to your stake. 3/2 means you win $3 for every $2 bet. They are commonly used in UK and Irish betting.
What is implied probability?
Implied probability is the likelihood of an outcome as suggested by the odds. It is calculated as 1/decimal odds × 100%. For example, 2.00 decimal odds imply a 50% probability.
Why do bookmaker probabilities add up to more than 100%?
Bookmakers build in a margin (vig/juice) to ensure profit. The total implied probability of all outcomes typically exceeds 100%, with the excess being the bookmaker's edge.