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Odds Converter

Convert between American, decimal, fractional odds and implied probability

Enter odds in any format:

Odds Format Guide

American Odds

Positive numbers (+150) show profit on $100 bet. Negative numbers (-200) show how much to bet to win $100.

Decimal Odds

Total return for every $1 bet. Includes original stake. Popular in Europe and Canada.

Fractional Odds

Profit relative to stake. 3/2 means win $3 for every $2 bet. Popular in UK.

Implied Probability

The probability percentage that the odds imply. Lower percentage = higher payout.

How to Use the Odds Converter Calculator

Quick Start Guide

Simply enter odds in any format you have, and our calculator instantly converts them to all other formats. Whether you're dealing with American odds from US sportsbooks, decimal odds from European sites, or fractional odds from UK bookmakers, conversion is seamless and instant.

  • Enter odds in your preferred format
  • View instant conversions to all formats
  • See implied probability percentage

Real-World Example

Let's say you find Lakers moneyline at +150 on an American sportsbook. Using our converter:

American:+150
Decimal:2.50
Fractional:3/2
Implied Probability:40.0%

This means a $100 bet wins $150 profit, with a 40% implied chance of winning.

Understanding Different Odds Formats

American Odds

Most common in US sportsbooks. Positive numbers show profit on $100 bet, negative numbers show amount needed to win $100.

+200 = Win $200 on $100 bet

-150 = Bet $150 to win $100

Decimal Odds

Popular in Europe and Canada. Shows total return (including stake) for every $1 bet.

3.00 = $3 total return on $1 bet

1.67 = $1.67 total return on $1 bet

Fractional Odds

Traditional UK format. Shows profit relative to stake amount.

5/2 = Win $5 for every $2 bet

1/3 = Win $1 for every $3 bet

Why Use an Odds Converter?

Compare Across Sportsbooks

Different sportsbooks use different odds formats. Our converter lets you quickly compare odds from American books (+150), European sites (2.50), and UK bookmakers (3/2) to find the best value.

Calculate True Probability

Implied probability shows what the sportsbook thinks the actual chance of winning is. Compare this to your own analysis to identify value bets where you think the true probability is higher.

Bankroll Management

Understanding exact payout ratios helps with precise bankroll management. Decimal odds make it easy to calculate exact returns, while American odds help you understand risk vs reward quickly.

Professional Betting

Serious bettors work with odds in multiple formats daily. Quick conversion saves time and prevents costly mistakes when placing bets across different platforms and regions.