In the world of online betting, different regions speak different languages. Europe uses Decimal, the UK prefers Fractions, and the US operates with American (Moneyline) odds.
Our Odds Converter eliminates the confusion. Whether you are analyzing an NFL game with American lines or a Premier League match with Decimal odds, this tool translates everything instantly. It also calculates the Implied Probability, helping you understand the real percentage chance of winning.
How to Use the Odds Converter
This tool is designed to be reactive—you don’t need to press a “Calculate” button. Just type into any field, and the others will update automatically.
- Choose Your Known Format: Identify which format you currently have (e.g., you see odds of +150 on a US betting site).
- Enter the Value: Type the number into the corresponding field (e.g., the “American Odds” field).
- Read the Results: The calculator will instantly convert this value into:
- Decimal Odds: The standard multiplier used in Europe and Australia.
- Implied Probability: The percentage chance the bookmaker assigns to this outcome (mathematically).
Example of Odds Conversion
Understanding how different formats represent the same math is crucial for spotting value.
Example 1: The “Even Money” Bet
This is a 50/50 toss-up scenario (like a coin flip).
- Decimal: 2.00 (You bet $100 to win $200 total).
- American: +100 (You bet $100 to win $100 profit).
- Fractional: 1/1 (One-to-one).
- Probability: 50%.
Example 2: The Favorite (Low Risk)
Imagine a strong team like Manchester City playing a lower-tier team.
- Decimal: 1.50 (You bet $100 to win $150 total).
- American: -200 (You must bet $200 to win $100 profit).
- Probability: 66.67% (The bookmaker thinks this team wins 2 out of 3 times).
Frequently Asked Questions (FAQ)
What is Implied Probability?
Implied probability is the conversion of betting odds into a percentage chance of winning. If the implied probability is 40%, but you believe the real chance is 50%, you have found a “Value Bet”.
How do American Odds work?
American odds center around the number 100.
Positive numbers (e.g., +150): Show how much profit you make on a $100 bet.
Negative numbers (e.g., -150): Show how much you must bet to make $100 profit.
Which odds format offers the best payout?
None. The format (Decimal, American, Fractional) is just a different way of displaying the exact same price. A coefficient of 2.50 pays exactly the same as +150. The “best” odds depend on the bookmaker, not the format.
How to convert Decimal odds to Probability?
The formula is very simple: 1 divided by Decimal Odds. For example, if the odds are 4.00, the probability is 1 ÷ 4.00 = 0.25 (or 25%).