True Odds Calculator And a couple of Methods To Use It

Home » True Odds Calculator And a couple of Methods To Use It

True Odds Calculator

The basic foundation to beat the bookmakers is to at all times guess over the True Odds.

Have you learnt them, do you’re taking them under consideration on the time of betting?

If not, you’re a ship with out sails no rudder and the day of your capsizing as a bettor is close to.

This true odds calculator is all it’s good to be sure to guess with worth.

I’ll go away it right here, and just under I’ll clarify easy methods to use it and why and when do it’s good to take away the margin of the bookmakers.

What are the true odds?

As you already know, (and if not, you must), the betting odds are associated to the possibilities of every final result.

The decrease odds, the upper likelihood, and vice versa.

To clarify the usefulness of this calculator and why it’s a MUST in any worth betting technique, let’s begin at the start.

What are the possibilities?

We will approximate the possibilities with the components:

Probability True Odds Calculator

Within the following soccer match between “Actual Madrid” and “Atlético de Madrid” (odds taken saturday eleventh, 17:16):

Example True Odds Calculator

  • Actual Madrid to win = 1/ 2.09= 0.478
  • Draw = 1/ 3.59 =0.279
  • Atlético de Madrid to win = 1/ 3.77= 0.265

However, wait, if we sum 0.478+0.279+0.265=1.022 > 1, and I keep in mind that the sum of all of the potential outcomes of a match must be equal to 1…

What’s that 0.022?

It’s known as the vig (or vigorish), juice, margin or overround.

This fashion, the bookies pay lower than they obtain via the bets of the customers. 

The payout is 1/(1+0.022)=0.9781.

If the guess quantities of every final result are proportional to the inverse of the chances, the bookies win a “fee” of (1-0.9781)=0.0215=2.15% of the overall quantity guess.

The basics of worth betting are:

→ Because the bookies apply this margin to the chances leading to decrease odds than the inverse of the likelihood, it’s good to win a bit of bit greater than the possibilities estimated by the bookies if you wish to receive revenue.

However, that are the possibilities estimated by the chances?

Following the earlier instance, the bookie’s estimation of the possibilities are at all times barely decrease than the inverse of the chances.

That implies that Pinnacle’s estimation of the likelihood of Madrid to win is decrease than 0.478, the likelihood of a draw is decrease than 0.29 and the likelihood of Atletico to win is decrease than 0.265.

Okay, however once more,

That are the “true possibilities”, and their inverse, the “true odds”, in response to the bookie’s odds?

→ No person, besides the bookies and their suppliers, is aware of precisely how they apply the margin to the true odds.

Nonetheless, there are a number of strategies to calculate the “true odds”, or “take away the margin”.

Which one the bookies are utilizing is not possible to know.

The strategies

The strategies to take away the margin we now have included within the true odds calculator are:

  • Equal margin (EM)
  • Margin proportional to odds (MPTO)
  • Shin (SHIN)
  • Odds ratio (OR)
  • Logarithmic (LOG)

Let’s return to the Actual Madrid vs Atlético odds. We’re going to calculate the “true odds” and “true possibilities” with the 5 strategies by deciding on 3 outcomes and writing the chances within the corresponding fields:

True Odds Calculator

Equal margin

The margin is 0.0223. The “Equal margin” technique multiplies the chances by the margin:

equal margin True Odds Calculator

This technique could be very easy, maybe an excessive amount of. The bookies in all probability don’t use it to calculate the chances from the possibilities.

Margin proportional to odds

With this technique, the upper odds, the extra margin is utilized. It’s calculated as:

True Odds Calculator formula

This technique is an efficient approximation, higher than the EM technique, and it is rather helpful as it is rather quick to calculate.


You could find an in depth rationalization of this technique on this article by Stephen Clarke et al. In a merely approach, it consists on discovering the worth of “c” that produces a sum of all the possibilities equal to 1:

True Odds Calculator shin formula

Don’t ask me why, however in case you begin with a worth of c=0, and iterate values of “c” till the sum of all the possibilities is 1, you’ve solved the Shin Methodology. You could find extra in regards to the process to unravel it iteratively within the supply code of this weblog article.

It ends in a really small distinction with the MPTO technique, however rather more troublesome to calculate. Is it price it?

Odds ratio

The chances ratio is defined intimately by Keith Cheung within the following hyperlink. It consists additionally on discovering the worth of “c” that produces a sum of all the possibilities equal to 1:

odds ratio True Odds Calculator formula

On this case, it’s good to begin with a worth of c=1, and iterate till the sum of possibilities is the same as 1. You additionally want some iterations and it could take extra time to calculate.


This technique is defined and in contrast with different strategies on this article by Joseph Buchdahl. On this case, the components used to calculate the possibilities that end in a sum equal to 1 could be very easy:

True Odds Calculator formula

Though it’s a quite simple components, you additionally must iterate beginning with a worth of c=1. It’s thought of to end in very exact outcomes, however as an iterative technique, you want extra time and write some code to make use of it.

Why and when do I must take away the margin?

By eradicating the margin, you might be calculating the estimation of the possibilities by the bookmaker at early or opening odds, or the possibilities obtained by the “knowledge of the group” concept at closing odds.

There are a number of methods to use this “true odds” or “true possibilities”:

  • Discover worth bets with Optimistic Anticipated Worth through the use of sharp bookies odds
  • Estimate the Anticipated Worth of a guess by calculating the CLV

Discovering worth bets

Should you take into account that the top odds, a “sharp” bookie, are based mostly on an excellent estimation of the possibilities, then you possibly can take away the margin and calculate the “true odds” with out margin with a purpose to discover worth bets.

Should you discover every other bookmaker with odds greater than the “true odds”, you might be betting with Optimistic Anticipated Worth (EV+).

With the instance above, if the top odds are based mostly on an excellent estimation of the possibilities, and you’ve got an excellent technique to take away the margin, then you’ve the “true odds” and you’ll evaluate them with different bookies to calculate the EV.

Value Bets True Odds Calculator formula

Should you discover, for instance, that the chances of a house win are 2.15 in one other bookie, as 2.15>2.1230 (Log), then you’ve a optimistic Anticipated Worth of: 2.15/2.123-1=0.0127=1.27%.

It isn’t a really excessive yield, however in case you guess a whole lot of occasions on this scenario, you’ll have a revenue in the long run. So,

Keep in mind that it’s good to take away the margin earlier than contemplating {that a} distinction of odds between bookmakers is sufficient to discover worth within the greater odds.

You should utilize the true odds calculator to estimate this EV very quick:

  1. Enter the chances of a pointy bookie, on this case Pinnacle, within the left column
  2. Choose the chances you might be evaluating. On this case, for a house win, Odds 1
  3. Enter the upper odds of the bookmaker you’ve discovered within the column on the proper
  4. Click on on the “Calculate” button.

True Odds Calculator

If the ultimate “EV” row reveals optimistic values, then it’s price betting on the upper odds.

Calculating the CLV

Should you had guess the day earlier to the match on the Actual Madrid victory, at odds 2.09, you’d have in all probability guess with optimistic Anticipated Worth, contemplating that the closing odds are based mostly on a significantly better estimation of the true likelihood of every final result and so they have led to a a lot decrease worth.

On this case, the closing odds of the match a couple of minutes earlier than the beginning had been:

How can we calculate the EV of betting the day earlier than the match on a house victory at odds 2.09? We will use the true odds calculator too:

  1. On this case we use the closing odds within the left column.
  2. Then we choose the end result we now have guess (Odds 1, akin to the house victory odds)
  3. Within the subject underneath the margin, we enter the chances we now have guess
  4. Then click on on calculate

True Odds Calculator

Within the final “EV” row of the desk, yow will discover the long run Anticipated Worth of your guess. In keeping with the Log technique, it’s 0.0699, a really good one.

If the final row reveals optimistic values in most of your bets when evaluating them with the closing odds, then you might be “beating the closing line” and you’ll in all probability receive revenue in the long run.

Should you have no idea what the anticipated worth is, see this text:

What Is Anticipated Worth? EV Calculator For Betting

Be open minded

Right here we now have shared with you a option to take away the margin and estimate the “true possibilities” in response to the chances.

We hope you discover it helpful and assist you to grasp the very small edge we often have when betting, and the way essential it’s to at all times guess on the upper accessible odds amongst many bookmakers.

In case you have any instance you need to share or you’ve any query, you should utilize the feedback of this put up or write to [email protected]

However don’t stick with the CLV, these “true possibilities” are an excellent estimation on common when analysing a whole lot of matches. Nonetheless, they aren’t at all times proper in a person match. For my part, there are two methods of successful or getting worth bets:

  1. You understand one thing BEFORE the market contains this info into the chances. Your technique is quicker otherwise you simply don’t want to attend for greater liquidity or greater odds.
  2. You might have BETTER info than the market in the meanwhile of the guess, and this data might be later included into the chances or not, even if you’re putting the guess.

Should you often get worth in response to 1), you’d by no means win by betting near the beginning of the match, and the earlier you guess, the higher.

Should you get worth in response to 2), with a distinct supply of data of study than the bookies and the knowledge of the group, typically it’s higher to attend for greater odds or greater liquidity, and you would even wait to the beginning of the match, though it’s a lot more durable to win by betting at this second when all of the details about the match has been taken under consideration within the odds.

Notice: Bear in mind which you can learn and duplicate the code of this true odds calculator within the supply code of this internet web page. You can even obtain a Matlab model right here.

Should you use it, please point out The Worth Betting Weblog and the authors of the formulation I’ve used on this article. Thanks!

Leave a Reply

Your email address will not be published.

New Bookmakers

100% Free Bet Cashback


Get 2 x $10 Free Bets at Royal Bet. Minimum deposit $10.


Live Casino Games Good Customer support


SBOBET sportsbook is popular with most players because of its numerous bonuses.

Falcon Bet

Massive range of odds. All payment methods.