Odds Converter Calculator
How To Use This Calculator
Convert between any betting odds format instantly. Enter your odds in one format and see the equivalent value in all 7 formats.
Select the odds format you want to convert from.
Type in your odds value. Results update in real-time.
View all 7 conversions and copy any value with one click.
What Are Betting Odds Formats?
Betting odds represent the probability of an outcome and determine your potential payout. Different regions use different formats, but they all express the same thing — how likely an event is and how much you stand to win.
Show total return per unit staked. 2.50 means a $10 bet returns $25. Most straightforward format, standard in Europe and Australia.
Positive (+150) shows profit on $100 stake. Negative (-200) shows stake needed to profit $100. Standard in the US and Canada.
Show profit relative to stake as a fraction. 3/2 means $3 profit for every $2 wagered. Traditional format in the UK and Ireland.
The percentage chance of an outcome as suggested by the odds. Essential for identifying value bets by comparing to your own probability estimates.
Like American odds but with a base of 1 instead of 100. Positive values show profit per unit staked, negative values show units to stake per unit of profit.
Always positive. Show net profit per unit staked (decimal odds minus 1). 1.50 means $1.50 profit on a $1 bet.
Range from -1 to 1. Positive for underdogs (profit per unit staked), negative for favorites (stake needed per unit of profit). Popular in Malaysia.
Quick Conversion Reference
| Decimal | American | Fractional | Probability | Indonesian | Hong Kong | Malay |
|---|---|---|---|---|---|---|
| 1.50 | -200 | 1/2 | 66.67% | -2.00 | 0.50 | 0.50 |
| 2.00 | +100 | 1/1 | 50.00% | 1.00 | 1.00 | -1.00 |
| 2.50 | +150 | 3/2 | 40.00% | 1.50 | 1.50 | -0.67 |
| 3.00 | +200 | 2/1 | 33.33% | 2.00 | 2.00 | -0.50 |
| 5.00 | +400 | 4/1 | 20.00% | 4.00 | 4.00 | -0.25 |
Common Mistakes to Avoid
Decimal 2.50 is not the same as fractional 2/5. Decimal 2.50 equals fractional 3/2. Decimal odds include your stake in the return, fractional odds show only profit.
The + and - in American odds are crucial. +150 means you profit $150 on a $100 bet. -150 means you need to bet $150 to profit $100. Mixing these up drastically changes the implied probability.
Odds include the bookmaker's margin (vig). The implied probabilities from odds on all outcomes will sum to more than 100%. Use our No-Vig Calculator to find the true probabilities.
Different sportsbooks display odds in different formats. Always convert to the same format when comparing odds to find the best line. This converter makes it easy.
Frequently Asked Questions
What are the different betting odds formats?
There are 7 main formats: Decimal (Europe/Australia), American/Moneyline (US/Canada), Fractional (UK/Ireland), Implied Probability, Indonesian, Hong Kong, and Malay. Each represents the same probability and payout differently.
How do I convert American odds to decimal?
For positive American odds (e.g., +150): divide by 100 and add 1, giving 2.50. For negative American odds (e.g., -200): divide 100 by the absolute value and add 1, giving 1.50.
What is implied probability?
Implied probability is the percentage chance of an outcome winning as suggested by the odds. For decimal odds, it's (1 / decimal odds) x 100. For example, 2.50 decimal odds imply a 40% probability.
Which odds format is easiest to understand?
Decimal odds are generally the easiest. They show your total return per unit staked, including your original stake. 2.50 means a $10 bet returns $25 total ($15 profit + $10 stake).
How do I calculate my payout from odds?
In decimal odds, multiply your stake by the odds: $10 x 2.50 = $25 total return. In American odds, for +150: $10 x (150/100) = $15 profit. For -200: $10 / (200/100) = $5 profit.
What is the difference between Hong Kong and Malay odds?
Hong Kong odds are always positive and show net profit per unit staked (decimal minus 1). Malay odds range from -1 to 1: positive for underdogs (profit per unit staked), negative for favorites (stake needed per unit of profit).
How do Indonesian odds work?
Indonesian odds work like American odds but with a base of 1 instead of 100. Positive Indonesian odds (e.g., 1.50) mean you profit 1.50 units per 1 unit staked. Negative (e.g., -1.50) means you stake 1.50 units to profit 1 unit.
Why do different regions use different odds formats?
Different formats evolved independently in different markets. Fractional odds have a long history in UK horse racing, American odds developed around the US moneyline system, and Asian formats like Malay and Hong Kong emerged from local betting traditions. Today, most online sportsbooks let you switch between formats.
Pro Tip: Use Implied Probability to Find Value
Converting odds to implied probability is the most powerful skill in sports betting. If you believe a team has a 50% chance of winning but the odds imply only 40%, that's a value bet. Combine this converter with our EV Calculator to quantify the edge.