Odds Converter

Betting Odds Converter into

If you understand how betting odds work, you’ve probably asked yourself why there are three formats for expressing the same thing. And it’s a good question – but it seems unlikely that the world will suddenly decide to use a unified betting odds format. Think of it as with the metric vs. imperial measurement systems. At this point, everyone is just used to the way odds were being expressed and is unwilling to change.

With that in mind, it can be inconvenient using odds you’re not familiar with. While most top betting sites allow for all three widespread formats to be used interchangeably, that’s not always the case. Alternatively, you might be looking at betting tips or guides which use a format you’re not familiar with. In such cases, you’ll need to convert one odds format to another.

Generally speaking, the process is not difficult. However, it can be made even easier with Betting Fellow’s free betting odds converter. To use it, just type in the odds you wish to convert in the corresponding field, and the converter will display the equivalent odds in other formats.

How do betting odds formats work?

Betting fellow already has a detailed guide to betting odds, how they are calculated, and what the numbers in the odds represent. We suggest reading that page carefully because this one is more focused on converting one format to another.

How decimal odds work

Decimal odds essentially represent the ratio between the stake and the potential returns. They are arguably the easiest format to understand and use, and are the most widespread as a result.

For example, odds of 2.00 mean that your winnings would be £20 for a £10 stake. Odds of 3.0 would mean a total return of £30 for the same stake.

How fractional odds work

Fractional odds are most popular in the United Kingdom and Ireland. Essentially, this format represents the potential profit of the bet relative to the stake.

For instance, a £10 stake at odds of 2/1 would mean your profits would be £20. That means that the total returns for this bet are £30 – just add your stake to your profits to calculate total returns.

How American Moneyline odds work

Mostly popular in the US, this format is a bit trickier if you’re not used to it. This format can take one of two forms: positive and negative.

Positive American Moneyline odds indicate the amount won for every $100 staked. For example, at odds of +350, you would win a profit of $350 if you were to stake $100. That makes the total returns for this example $450.

Negative American Moneyline odds indicate the amount you would need to wager to win $100 of profit. That means you would have to wager $350 at odds of -100 if you wanted to make $100 of profit.

How to Convert Betting Odds?

If you cannot use a converter for whatever reason, there is a simple formula for converting every odds format to every other format, as well as to probabilities. Let’s take a look at them now.

Converting Decimal Odds

How to convert decimal odds to fractional?

Simply subtract 1 from the decimal representation, and then use the fractional representation of the resulting value. For example, if you wish to convert odds of 3.0: 3 – 1 = 2. The fractional representation of 2 is 2/1. As a more complicated odds, you may need to do some light math. In case you need to brush up on it, let’s go over the process:

Let’s say you wanted to convert odds of 1.75. You would start by subtracting one, which results in 0.75. Divide the result by 1, making a fraction: 0.75/1.

Because there are two digits after the decimal point, multiply it by 100, resulting in 75/100. You already have your odds, you just need to simplify them by dividing both the top and bottom part with their Greatest Common Factor – in this case, that is 25. The final result is ¾.

How to convert decimal odds to American Moneyline?

For positive American odds, simply subtract 1 from the decimal odds value and multiply by 100. For example, for odds of 3.00: (3 - 1) * 100 = 2 * 100 = + 200

For negative American odds, subtract 1 from the decimal odds and divide a negative 100 with the resulting number. For example, for odds of 1.20: - 100 / (1.2 - 1) = -100 / 0.2 = -500

How to convert decimal odds to probabilities?

Divide 1 by the decimal odds value and multiply a result by 100. For example, for odds of 3.00: (1 / 3) * 100 = 33%

Converting Fractional Odds

How to convert fractional odds to decimal?

Simply add 1 to the decimal representation of the same value as the fractional odds. For example, the decimal representation of 2/1 is 2.00, and when you add 1 you get odds of 3.00.

To calculate decimal representations, just divide the fraction. For instance, 1 / 3 = 0.33. That means that fractional odds of 1/3 are equal to the decimal odds of 1.33.

How to convert fractional odds to American Moneyline?

For positive Moneyline odds, multiply the fractional value by 100. On the example of odds of 2/1: (2 / 1) * 100 = 2 * 100 = +200.

For Negative Moneyline odds, divide negative 100by the fractional value: 1/5 = -100 / (1 / 5) = -500.

How to convert fractional odds to probabilities?

Add 1 to the fractional odds, divide 1 by the resulting number, and multiply it all by 100. For instance: (1 / ((3 / 1)+1)) * 100 = (1 / 4) * 100 = 0.25 * 100 = 25%.

Converting US Moneyline Odds

How to convert US Moneyline odds to decimal?

For positive odds, divide the odds by 100 and add 1. For example, for odds of +200: (200 / 100) + 1 = 2 + 1 = 3.00.

For negative odds, divide 100 by the odds and subtract it from 100. Eg. For odds of -200: 1 – (100 / -200) = 1 – (-0.5) = 1 + 0.5 = 1.5.

How to convert US Moneyline odds to fractional?

For positive odds, just divide the odds by 100. For example, 200/100 = 2/1.

For negative odds, divide negative 100 by the odds: -100 / -200 = 1/2.

How to convert US Moneyline odds to probability?

For positive odds, add 100 to the odds, divide 100 by the resulting number, then multiply the whole thing by 100. For example, for odds of +200: (100 / (200 + 100) * 100 = (100 / 300) * 100 = 0.33 * 100 = 33%

For negative odds, multiply the odds by -1 to get a positive value. Then, divide the odds by the odds plus 100, and multiply it all by 100. For instance: -200 * -1 = 200; (200 / (200 + 100)) * 100 = (200 / 300) * 100 = 0.67 * 100 = 67%