Free Odds Converter: American, Decimal and Fractional Odds
This free odds converter switches between American, decimal, and fractional betting odds and shows the implied probability. It is part of our Sports Tools and Utilities hub.
Welcome to SportsBrackets.net’s Free Odds Converter. Your go-to tool for instantly switching between American (moneyline), Decimal, Fractional odds, and Implied Probability percentages. Whether you’re comparing lines across sportsbooks, decoding international betting formats, or quickly gauging the true likelihood behind any wager, this converter makes it effortless. No math headaches required. Just enter one value, and watch the rest update in real time.
How Can the Free Odds Converter Help you?
This odds converter is a game-changer for smarter sports betting: it saves time by automating conversions, helps you spot value bets by revealing implied probabilities (so you can compare your own predictions to the book’s), and ensures you’re always reading odds in your preferred format. No matter if you’re used to U.S. moneyline, European decimal, or UK fractional styles. Pair it with our powerful Parlay Odds Calculator to build multi-leg bets with precise pricing and payouts. Ready to level up your game? Jump in below or head straight to our Parlay Odds Tool for even more winning insights.
Free Odds Converter
Here’s the free odds converter utility for you. Whether you are following the Super Bowl, March Madness, or other sports, it can help.
Free Odds Converter
Enter odds in any format — the rest will update automatically. Also shows implied probability of winning.
Powered by SportsBrackets.net — Visit our Parlay Odds Tool
How Betting Odds Formats Work
American Odds (Moneyline)
Popular in the US. Positive (+) shows profit on a $100 bet (e.g., +200 = win $200 profit on $100 stake, total $300 return). Negative (-) shows amount to bet to win $100 (e.g., -150 = bet $150 to win $100 profit, total $250 return).
Decimal Odds
Common in Europe, Canada, Australia. Shows total return per $1 staked (including stake). E.g., 2.50 means $1 bet returns $2.50 total ($1.50 profit).
Fractional Odds
Traditional UK/Ireland format. Shows profit relative to stake. E.g., 3/1 means win $3 profit per $1 staked (total $4 return). 1/2 means win $0.50 profit per $1 staked.
Implied Probability
The % chance the bookmaker assigns to the outcome (removing vig/overround for rough estimate). Lower % = longer odds/higher payout. Useful for spotting value: if you think true probability > implied %, it’s potentially +EV.
Odds Conversion Quick Reference Table
| American | Decimal | Fractional | Implied Probability | $100 Bet Return (approx.) |
| -500 | 1.2 | 1/5 | 83.33% | $120 |
| -200 | 1.5 | 1/2 | 66.67% | $150 |
| -150 | 1.67 | 2/3 | 60.00% | $167 |
| -110 | 1.91 | 10/11 | 52.38% | $191 |
| 100 | 2 | 1/1 (evens) | 50.00% | $200 |
| 150 | 2.5 | 3/2 | 40.00% | $250 |
| 200 | 3 | 2/1 | 33.33% | $300 |
| 300 | 4 | 3/1 | 25.00% | $400 |
| 500 | 6 | 5/1 | 16.67% | $600 |
Common betting lines and their equivalents across formats.
Frequently Asked Questions
What does an odds converter do?
An odds converter changes betting odds between American, decimal, and fractional formats and shows the implied win probability, so you can compare prices no matter how a sportsbook lists them.
How do you convert American odds to decimal?
For positive American odds, divide by 100 and add 1. For negative odds, divide 100 by the absolute value and add 1.
What are decimal odds?
Decimal odds show the total return per 1 unit staked, including your stake. Odds of 2.50 return 2.50 for every 1 wagered.
Why do sportsbooks use different odds formats?
American odds are common in the United States, decimal odds in Europe and Australia, and fractional odds in the United Kingdom. They all describe the same price.
Is the odds converter free to use?
Yes, it is free, runs in your browser, and requires no signup or download.
