While the premise of betting is very simple, reading the odds isn’t always straightforward. Depending on where you place your bets, you could be met with one or two different types of odds: fractional, decimal, or American. With the internet giving us access to so many new platforms and betting articles, we’re experiencing a clash of odds, sometimes making it tough to know exactly what you’re backing.
So, in this betting odds converter guide, we’re going through everything that you need to know. This includes the interactive odds converter above, an odds conversion table for quick reference and how to convert odds of American or fractional to decimal odds, decimal to fractional odds or American, and American odds to decimal or fractional.
For a quick and easy way to convert odds, this odds conversion table starts with a decimal odds converter into fractional odds, and then also a US odds converter column from the fractional and decimal odds. Using an odds converter calculator, you’ll get all of the below results.
To use the odds conversion table above to convert odds, you need to find the odds that you’re working with, and then go along the row to find the odds converter value. As an example for doing a decimal odds calculator, you need to go down the orange columns to find your decimal odds.
Then, go to the right for the decimal to fraction odds, or further for the American odds converter value in its plus or minus form. You could also work the other way to convert fractional odds to decimal or American odds to decimal.
Use the table above to solve all of the most commonly asked odds conversion questions, including 1/2 odds in decimal, 3/1 odds in decimal, 1/5 in decimal odds, and more.
There are three different types of odds: fractional odds, decimal odds, and American odds. Using the betting odds converter, you can read any of these odds in the format that you’re familiar with, and each of them relays the same thing, which is the likelihood of an event occurring according to the odds calculations of the bookmaker. Here’s a closer look at each type of odds.
Fractional odds are most common in UK betting markets. Looking at fractional odds, you can quickly see the rate of return, with the number on the left of the fraction showing the return if you were to bet the number on the right of the fractional odds.
Below evens odds (1/1) are shown with a smaller number on the left than on the right. For example, odds of 7/2 return nine coins on a bet of two coins, or 4.5 on a bet of one coin – including the return of the wager. Most who turn to an odds converter or odds conversion table do so to convert odds fractional to decimal.
Decimal odds are the more common type, particularly popular on European betting platforms. The layout lets you instantly know your full return on a winning bet that stakes a single unit. So, a bet of one coin on odds of 2.88 will return 2.88 coins.
Anything below evens (2.00) in decimal odds is shown as a 1. Number, reflecting the one coin that you’d return from a one coin bet. As decimal odds are quite common now, many are converting to using them as standard, so there are a lot of fraction to decimal odds calculator searches.
American odds are becoming more widespread due to the US opening up to online sports betting in 2018. The US odds converter can be the trickier of the types of odds to understand as it works in plus and minus numbers.
Evens in American odds is -100, with anything above evens being at +101 or higher. Below evens starts with -101 and decreases with shorter odds. American odds to decimal isn’t too tricky once you spot the pattern, for example, +160 becomes 2.60 and +275 becomes 3.75, but you’ll likely need a betting odds converter to work out American odds to fractional odds.
Converting odds fractional to decimal, American odds to decimal, or decimal odds to American odds or fractional odds is much easier to do with an odds converter or odds conversion table. Just in case you need to run an odds converter calculator by hand, this is the process of fractional to decimal odds.
For the odds conversion of fractional to decimal odds, you need to divide the figure on the left of the fraction by the figure on the right of the fraction. Then, you add 1.00 the result of the division to complete the fraction odds to decimal conversion.
The prime examples to use here are the odds conversion calculations to find 2/1 odds in decimal and 1/2 odds in decimal. To calculate 1/2 odds in decimal, you take the 1 on the left and divide it by the 2 on the right. This gives you 0.5. Add on 1.00 and you have your fraction to decimal odds of 1.50 from 1/2. With 2/1 odds in decimal, you get 2 divided by 1 to get 1, add on 1.00, and you have decimal odds of 2.00.
Here’s the long list of how to run fractional odds to decimal calculations, from 1/5 odds in decimal to 1/2 odds in decimal, all the way up to 9/1 in decimal.
Odds are a show of probability, but to truly see the probability being shown, you’ll need to use a different kind of betting odds converter to convert odds to probability. This could also be seen as an exercise to convert odds ratio to probability, and the process is a bit different for each type of odds.
To convert odds to probability from decimal odds, you need to calculate 1 ÷ [decimal odds] x 100. For example, with odds of 1.33, you run 1 ÷ 1.33, which equals 0.75, and then x100 to get 75.19%. As decimal odds show as an odds ratio, you can see this as a method to convert odds ratio to probability.
To convert odds to probability from fractional odds, you need to calculate [odds denominator] ÷ [odds denominator + odds numerator] x100. In action, this odds converter into implied probability looks like 7/2 fractional odds becoming 2 ÷ (7+2), which equals 0.2223. Multiply this by 100, and you get a probability of 22.23%.
To convert odds to probability from positive American odds (ones with a +), you need to calculate 100 ÷ [odds + 100] x100. This would look like +320 odds running through as 100 ÷ 420 to get 0.2381, and then x100 to have a probability of 23.81%.
For negative American odds, it’s [odds] ÷ [odds +100] x100. The probability of -250 odds is worked out at 250 ÷ 350 to get 0.7143, x100 to find the probability of 71.43%.
At Sports Betting Portfolio, we predominantly make use of decimal odds, as we feel that it’s the most accessible type of odds for bettors to see how much they’ll win from any given bet. To get the best odds and bets, subscribe to our service today to get direct advice from our tipsters straight to your Telegram.