How to Read Odds
Understanding how to read odds is the foundation of smart/profitable betting. When encountering them for the first time, the numbers can look confusing.
Yet they all do the same two things:
- show how likely something is to happen
- how much you can win if it does.
Once you understand the formats, it becomes much easier to compare bets and make informed decisions.
Types of Odds
There are three main types of odds you’ll see:
- fractional
- decimal
- American (moneyline)
Different countries and regions prefer different styles, but they all represent the same information. We will explain all three methods and eventually learn you how to read odds no matter the circumstances.
Fractional Odds
Fractional odds are common in the UK and Ireland and in some Commonwealth provinces. They look like 5/1, 2/1, or 1/4. The first number tells you how much profit you make relative to the second number, which represents your stake.
| Fractional Odds | Bet Amount | Profit | Total Return |
|---|---|---|---|
| 5/1 | $20 | $100 | $120 |
| 2/1 | $20 | $40 | $60 |
| 1/4 | $20 | $5 | $25 |
If the first number is larger (like 5/1), the selection is considered an underdog. If it’s smaller (like 1/4), it’s a strong favorite with lower profit potential.
Decimal Odds
Decimal odds are widely used in Europe, Canada, Australia and some parts of Africa. They are often the simplest format because they show your total return, including your stake.
In order to calculate the return, just multiply your bet by the decimal number.
| Decimal Odds | Bet Amount | Calculation | Total Return |
|---|---|---|---|
| 6.00 | $20 | 20 × 6.00 | $120 |
| 2.50 | $20 | 20 × 2.50 | $50 |
| 1.50 | $20 | 20 × 1.50 | $30 |
To calculate profit only, deduct the original stake from the total return. Lower decimal numbers indicate higher probability and mark the favorite, while higher numbers suggest the underdog, the lower probability, and also the bigger payouts.
American (Moneyline) Odds
American odds use plus (+) and minus (−) signs.
- Positive odds (e.g., +500) show how much profit you’d make on a $100 bet.
- Negative odds (e.g., −150) show how much you need to bet to win $100.
Here’s how it works:
| American Odds | Bet Amount | Profit | Total Return |
|---|---|---|---|
| +500 | $20 | $100 | $120 |
| +200 | $20 | $40 | $60 |
| -150 | $150 | $100 | $250 |
| -150 | $15 | $10 | $25 |
Positive numbers usually represent underdogs. Negative numbers usually indicate favorites. This does not apply to Futures and Outrights.
Comparing All Three Odds Formats
To see how they match up, here’s the same odds in different formats:
| Fractional | Decimal | American |
|---|---|---|
| 5/1 | 6.00 | +500 |
| 2/1 | 3.00 | +200 |
| 1/2 | 1.50 | -200 |
All three formats above represent the same value, but the display method is different.
When reading odds, always consider two things: potential return and implied risk.
Bigger payouts come with lower probability. Smaller payouts usually indicate a higher chance of winning. This isn’t anything special; it’s how betting works in general.
Once you understand that balance, the numbers stop looking complicated and start making sense.