Odds Converter
The universal translator for sports betting. Convert American, Decimal, and Fractional odds instantly to find the best price across global sportsbooks.
Live Conversion
Edit any field
Wager Simulator
Why calculate manually? EdgeSlip's +EV dashboard automatically converts and compares odds from 10+ sportsbooks to find the best price for you.
Find Best OddsWhat is this tool?
The Odds Converter is a tool that translates betting prices between different formats. Depending on where you live or which sportsbook you use, you might see American Odds (-110), Decimal Odds (1.91), or Fractional Odds (10/11). Regardless of the format, they all represent the same thing: the probability of an event occurring and the potential payout. This tool bridges the gap, allowing you to compare lines from US, European, and UK bookmakers seamlessly.
How to use it
Simply enter a value into any of the input fields. The tool automatically detects the format and updates all other fields instantly. For example, typing '-150' in the American field will instantly populate '1.67' in Decimal, '2/3' in Fractional, and '60%' in Implied Probability. You can also enter a custom 'Stake Amount' to see exactly how much you would win.
Quick Conversion Chart
| American | Decimal | Fractional | Implied Prob |
|---|---|---|---|
| -200 | 1.50 | 1/2 | 66.7% |
| -150 | 1.67 | 2/3 | 60.0% |
| -110 | 1.91 | 10/11 | 52.4% |
| +100 | 2.00 | 1/1 | 50.0% |
| +150 | 2.50 | 3/2 | 40.0% |
| +200 | 3.00 | 2/1 | 33.3% |
| +500 | 6.00 | 5/1 | 16.7% |
Understanding Odds Formats
Sports betting is a global market, and different regions have developed their own "languages" for expressing risk and reward. To be a sharp bettor, you must be fluent in all of them (or use this tool).
American Odds
Centered around $100.
- Favorites (-): How much you must bet to win $100 (e.g. -110).
- Underdogs (+): How much you win if you bet $100 (e.g. +200).
Decimal Odds
The simplest format. Represents the Total Payout (Stake + Profit).
- Formula: Stake × Decimal = Payout
- Example: $10 × 2.50 = $25.00 Total Return.
Fractional Odds
Represents Profit / Stake.
- 5/1: Win $5 for every $1 wagered.
- 10/11: Win $10 for every $11 wagered.
Real-World Application: The "Break-Even" Analysis
One of the most powerful uses of an odds converter is quickly determining the break-even percentage required for a bet. Professional bettors rarely think in terms of "Will this team win?". They think, "Is the probability of this team winning higher than the implied probability of the odds?"
Scenario: The Underdog
You see the Detroit Lions at +140. Is this a good bet?
- Convert: Input +140 into the converter.
- Implied Probability: The tool shows 41.67%.
- Analysis: Do you believe the Lions win this game more than 42 times out of 100? If your model says they win 45% of the time, this is a +EV bet. If you think they only win 35% of the time, it's a bad bet, even if you "like" them.
Conversion Formulas
While our calculator does this instantly, knowing the math helps you spot value on the fly.
American to Decimal
Negative (-)
Ex: 100/110 + 1 = 1.91
Positive (+)
Ex: 200/100 + 1 = 3.00
Decimal to Implied Probability
Win Percentage
Ex: 1 / 2.00 = 0.50 (50%)
Why Line Shopping Matters
Using an odds converter is essential for Arbitrage Betting and Line Shopping. Often, a European bookmaker (like Pinnacle) might list odds in Decimal format (e.g. 2.10), while a US bookmaker (like FanDuel) lists them in American format (e.g. +105).
Without converting, it's hard to see the difference.
• Pinnacle: 2.10 (+110)
• FanDuel: +105 (2.05)
Converting revealing that Pinnacle is paying significantly more for the exact same bet. Over a season, taking the 2.10 instead of 2.05 can be the difference between profit and loss.
Frequently Asked Questions
What is the difference between Decimal and American odds?▼
How do I convert negative American odds to Decimal?▼
How do I calculate implied probability?▼
What does 'Even Money' mean?▼
Why do sportsbooks use different formats?▼
Ready to find your Edge?
Join thousands of smart bettors who have stopped guessing and started calculating. Access institutional-grade tools for the price of a standard wager.