Odds Converter: Decimal, American, Fraction & Probability
Odds Converter Calculator
What are American betting odds?
American betting odds are a popular way to represent the probability of a particular outcome in a betting event in the United States. They are also known as “moneyline” odds, and are commonly used in sports betting.
American odds can be represented as either a positive or a negative number. A positive number represents the potential profit you can make from a $100 bet, while a negative number represents the amount you need to bet to win $100.
For example, if the odds are +200, a $100 bet could potentially win you $200 in profit. If the odds are -200, you must bet $200 to win $100 in profit.
Positive odds are typically used for underdogs, which are less likely to win. Negative odds are used for favourites, which are more likely to win.
American odds are often used alongside other odds formats, such as decimal and fractional odds, and can be converted between these formats using simple mathematical formulas.
What are decimal odds?
Decimal odds are a popular way to represent the probability of a particular outcome in a betting event, particularly in Europe, Australia, and Canada. They are also known as “European” or “continental” odds.
Decimal odds represent the total amount you will receive back if you win a bet, including your original stake. For example, if the odds are 2.5, and you bet $10, you would receive $25 back if you win ($10 original stake plus $15 profit).
The decimal odds format is very easy to use and can be easily understood by beginners. To calculate the probability of a particular outcome using decimal odds, divide 1 by the decimal odds. For example, if the odds are 2.5, the probability of the outcome occurring is 1 / 2.5 = 0.4, or 40%.
Using mathematical formulas, decimal odds can also be easily converted into other odds formats, such as fractional and American odds. This makes them a versatile choice for betting enthusiasts who want to compare odds across different formats.
How do you convert American odds to decimals?
To convert American odds to decimal odds, you can use the following formula:
Decimal odds = (American odds / 100) + 1
If the American odds are positive, you would divide by 100 and add 1. For example, if the odds are +200, the calculation would be:
Decimal odds = (200 / 100) + 1 = 2.00
This means a $100 bet would potentially win you $200 in profit, for a total payout of $300.
If the American odds are negative, the calculation would be slightly different. In this case, you would divide 100 by the absolute value of the odds, and then add 1. For example, if the odds are -150, the calculation would be:
Decimal odds = (100 / 150) + 1 = 1.67
This means you would need to bet $150 to potentially win $100 in profit, for a total payout of $250.
Overall, converting American odds to decimal odds is a straightforward process that can be useful for comparing odds across different formats and calculating potential payouts for a particular bet.
How do you convert fractional odds to American?
To convert fractional odds to American odds, you can use the following formula:
American odds = ((numerator / denominator) + 1) x 100 if the fractional odds are below 2.
American odds = (-100) / ((denominator / numerator) – 1) if the fractional odds are 2 or greater.
Let’s take an example to understand this better. If the fractional odds are 4/1, you would divide 4 by 1 to get 4. Then, you would add 1 to get 5. Finally, you would multiply 5 by 100 to get the American odds, which would be +500.
Similarly, if the fractional odds are 5/2, you would divide 5 by 2 to get 2.5. Then, you would add 1 to get 3.5. Finally, you would multiply 3.5 by 100 to get the American odds of +350.
If the fractional odds are 1/2, you will divide 1 by 2 to get 0.5. Then, you would add 1 to get 1.5. Finally, you would multiply 1.5 by 100 to get the American odds of -200.
Converting fractional odds to American odds requires a bit of calculation. Still, it can be useful for comparing odds across different formats, and for determining the potential payout for a particular bet.
How do you convert odds to probability percentages?
To convert odds to probability percentages, you can use the following formula:
Probability percentage = (1 / Decimal odds) x 100
For example, if the decimal odds are 2.5, you would divide 1 by 2.5 to get 0.4. Then, you would multiply 0.4 by 100 to get the probability percentage, which would be 40%.
Similarly, if the decimal odds are 1.8, you would divide 1 by 1.8 to get 0.56. Then, you would multiply 0.56 by 100 to get the probability percentage of 56%.
If the odds are represented in fractional or American format, you first need to convert them to decimal odds using the appropriate formula and then use the above formula to calculate the probability percentage.
How do you convert probability percentages to odds?
To convert probability percentages to odds, you can use the following formula:
Decimal odds = (1 / Probability percentage) x 100
For example, if the probability percentage is 25%, you would divide 1 by 0.25 to get 4. Then, you would multiply 4 by 100 to get the decimal odds of 400.
Similarly, if the probability percentage is 60%, you would divide 1 by 0.60 to get 1.67. Then, you would multiply 1.67 by 100 to get the decimal odds of 167.
If you want to express the odds in fractional or American format, you must convert the decimal odds using the appropriate formula.
How do you convert decimal odds to American?
o convert decimal odds to American odds, you can use the following formula:
If the decimal odds are below 2, the American odds would be a positive number, which can be calculated as:
American odds = (decimal odds – 1) x 100
For example, if the decimal odds are 1.80, you would first subtract 1 to get 0.80. Then, you would multiply 0.80 by 100 to get the American odds, which would be +80.
If the decimal odds are 2 or greater, the American odds would be a negative number, which can be calculated as:
American odds = – (decimal odds – 1) x 100 / (decimal odds – 1)
For example, if the decimal odds are 3.50, you would first subtract 1 to get 2.50. Then, you would multiply 2.50 by 100 to get the numerator of the fraction, which would be -250. Finally, you would divide -250 by 2.50 to get the denominator of the fraction, which would be -100. So the American odds would be -250/-100 or +250.
You can round the result to the nearest integer to express the American odds as a whole number.
How to read betting odds?
The purpose of this article is to help you to make money from sports betting.
Even though approximately 98% of people who are betting on sports events are losing money in the long run, there are a lot of ways to make decent money from it.
With dedication, learning, patience, and a well-proven working strategy you can make a lot of money and you can do it even for a living.
In sports betting, odds are representing the statistical probability of a particular outcome. Depending on what country you are from, you may be familiar with the following, most common odds formats:
Fractional odds:
Fractional odds are commonly used in the United Kingdom and Ireland, and you can also meet them on horse racing bets. But arbitrage bettors in the UK and generally speaking outside of the US are using decimal odds.
Fractional odds are expressing the net payout you get relative to your stake. As an example, the odds of 3/1 would mean that if you win the bet you get a profit of 30$ if you placed a 10$ stake.
With another example, an odd of 1/5 would mean, that your profit would be 20$ after a stake of 100$.
Decimal odds:
These are most commonly used in other parts of Europe, Canada, Australia, and Singapore.
These odds at the payout are including your stake too, so for example with odds like 1.90 you place a stake of 100$ and if you win, the payout would be 190$, including your stake too, so with a profit of 90$.
Decimal odds are easy to understand and to use because they are the direct inverse of the probability of the outcome (an odd of 2 for example has the probability of 1 / 2 = 50%).
In the world of smart betting most of the time the decimal format is used so in my examples I will stick to it too. Down below you can see some examples of fractional, and decimal odds, and their percentage format.
| Fraction | Decimal | Implied Probability |
| 1/5 | 1.2 | 83.3% |
| 2/9 | 1.22 | 81.8% |
| 1/4 | 1.25 | 80% |
| 2/7 | 1.29 | 77.8% |
| 1/3 | 1.33 | 75% |
| 4/11 | 1.36 | 73.3% |
| 4/9 | 1.44 | 69.2% |
| 1/2 | 1.5 | 66.7% |
| 1/1 | 2 | 50% |
| 5/4 | 2.25 | 44.4% |
| 9/1 | 10 | 10% |
| 10/1 | 11 | 9.1% |
| 20/1 | 21 | 4.8% |
Source: Odds – wikipedia
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