1 2 Odds In Decimal

If you want to come out on top against the bookies it is vital that you understand the fundamentals. When it comes to sports betting there is nothing quite as fundamental as the odds that the bookies offer. Unfortunately, betting odds can prove very confusing. That’s especially true for people who are new to betting.

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That’s where this article comes in. We’re going to explain exactly how betting odds work, how they are set and the differences in the ways they are displayed. After taking in all the information below, you will be much better equipped to set about making some profit.

What Do Betting Odds Represent?

Here’s an example: The Stars are 1.714 in decimal odds (-140 in American). For every $1 wagered, the bettor profits 71.4 cents, plus the original stake of $1. The Oilers have odds of 2.2 in decimal odds (+120 in American), which means every $1 bet would profit $1.20 plus. Loading.please wait. If the data can not be loaded in 20 seconds,please reload. Conversely, if odds are very small (1/1000), probability will also be very small, close to 0. Probability/Odds Conversion. Converting probabilities into odds, we simply divide the probability by 1 less the probability, e.g., if the probability is 25% (0.25), the odds are 0.25/0.75, which can also be expressed as 1 to 3 or 1/3 or 0.333. Odds/Probability Conversion. Converting odds into probability, we divide the odds by 1+ the odds e.g., if we have odds of 1:3, then we divide 1. Decimal odds represent the amount a bettor wins for every $1 wagered. And the number represents the total return, not just the profit like American and fractional odds. The Packers would be 1.714 in decimal odds as a -140 favorite in American odds. For every $1 risked, you’re profiting 71.4 cents, plus your $1 back. The Vikings would be 2.2.

At their most basic, betting odds tell you two things:

1. How much you stand to make should the selection win
2. The probability of the selection winning

Take this example. If you were looking through the weekend Premier League fixtures and saw a team had fractional odds of 2/1 (that’s decimal odds of 3.0) you would know that you stand to win £2 in profit from every £1 that you stake should the team win. You’d also know that the bookmaker who set the odds ranks the team’s chances of winning as one in every three times the game is played.

If you saw a team had fractional odds of 8/13, you’d know that for every £13 you stake, you will win £8 or profit and that if the game was played 21 times in total, the bookies think the team would win 13 times and fail to win eight times (what is known as the implied probability).

Working out an implied probability percentage from fractional odds is simple. You just divide the stake by the combined sum of the two numbers which make up the fractional odds. In the case of 2/1 the equation looks like this:

1 / (2+1) = 0.33 or 33%

For odds of 8/13 this is the equation:

13 / (8+13) = 0.62 or 62%

That’s how the maths works but when it comes to the actual odds that bookmakers set, it’s a little more complicated.

How Do Bookmakers Set Their Odds?

The basic business model of a sportsbook is fairly uncomplicated. Bookmakers set the odds and take bets on an event. When that event ends they pay out everyone who backed the winner and then keep the rest for themselves.

But, consider the following horse race.

As you can see, the combined implied probability of the selections above is 100%. From a bookmaker’s perspective that is a big problem. That’s because, presuming they’ve got the same amount of liability on each selection, they’d never make any money as they’d have to collect and payout the same amount.

So, the bookmakers will build something called an overround into their odds. Here’s a real example of a match odds market from a football match:

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With an total implied probability of 101.7%, the bookmaker who set those odds is guaranteed to make a profit of 1.7% assuming that they have the same amount of liability on all three selections. Of course, it rarely works out that the bookies manage to spread their liability evenly but you need to know that when you look at a betting market you’re not simply looking at a reflection of how the bookies think the event will pan out. There’s much more going on behind the scenes.

Armed with this knowledge of how the bookmakers set their odds, you can concentrate on finding value. That is, finding a bet where you believe the odds (and therefore the implied probability) is too big. If the bookies think that a side has a 50% chance of winning but you think they’ve got a better chance than that, that’s value.

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The Difference Between Decimal and Fractional Odds

You will have seen above that we’ve spoken about both fractional and decimal odds. They are just different ways of conveying the same information but they do add another layer of complexity.

All the major online bookmakers will shows their odds as both fractions and decimals so it’s important that you understand just what they are showing and how to switch between the two. Thankfully, it only requires simple maths.

To go from a fraction to a decimal is as easy as dividing out the fraction and adding one. Here’s how that looks for odds of 2/1:

(2/1) + 1 = 3.o

And using our second example from above, 8/13, it looks like this:

(8/13) + 1 = 1.62

If you want to go from decimal odds to fractional odds is similarly simple. You just minus one from the decimal odds, turn that number into a fraction and reduce it down to it’s simplest form.

Let’s take decimal odds of 4.5, this is the equation:

4.5 – 1 = 3.5
35/10 -> 7/2

If the decimal price is 1.25, you convert it into fractional odds like this:

1.25 – 1 = 0.25
25/100 -> 1/4

Here’s a list of some of the most common fractional odds and their decimal equivalents (for a more in-depth list click here).

Key Terminology

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When reading betting advice or searching for a value bet on the bookies’ websites you’ll come across some key terms relating to betting odds. To round up our article on betting odds, we’ve covered the most widely used terms to ensure you don’t get confused in your search for winners.

Stake – The amount of money that you place (or wager) on a specific bet.

Price – The price of a bet is simply another way of referring to the odds. You can either say that a football team can be backed at odds of 2/1or that their price is 2/1.

Odds On & Odds Against – Two of the key terms that you’ll hear when it comes to betting odds are ‘odds on’ and ‘odds against’. These terms refer to whether a price is greater or lower than evens. Any price above evens is known as odds against, while anything below evens is odds on.

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Short and Long Odds – If something is described as being short odds it means the price is low. A long odds shot will provide you with a bigger win but is much less likely to win.