Fractional odds are also known as British odds, UK odds,  or, in that country, traditional odds. Odds with a denominator of 1 are often presented in listings as the numerator only. A variation of fractional odds is known as Hong Kong odds. Fractional and Hong Kong odds are actually exchangeable. The only difference is that the UK odds are presented as a fractional notation e.
Both exhibit the net return. The European odds also represent the potential winnings net returns , but in addition they factor in the stake e. Favoured in continental Europe , Australia , New Zealand , Canada , and Singapore , decimal odds quote the ratio of the payout amount, including the original stake, to the stake itself.
Therefore, the decimal odds of an outcome are equivalent to the decimal value of the fractional odds plus one. This is considered to be ideal for parlay betting, because the odds to be paid out are simply the product of the odds for each outcome wagered on. When looking at decimal odds in betting terms, the underdog has the higher of the two decimals, while the favorite has the lower of the two.
Decimal odds are favoured by betting exchanges because they are the easiest to work with for trading, as they reflect the inverse of the probability of an outcome. Decimal odds are also known as European odds , digital odds or continental odds. Moneyline odds are favoured by American bookmakers. The figure quoted is either positive or negative. Moneyline odds are often referred to as American odds.
A "moneyline" wager refers to odds on the straight-up outcome of a game with no consideration to a point spread. In most cases, the favorite will have negative moneyline odds less payoff for a safer bet and the underdog will have positive moneyline odds more payoff for a risky bet. However, if the teams are evenly matched, both teams can have a negative line at the same time e.
In gambling, the odds on display do not represent the true chances as imagined by the bookmaker that the event will or will not occur, but are the amount that the bookmaker will pay out on a winning bet, together with the required stake.
In formulating the odds to display the bookmaker will have included a profit margin which effectively means that the payout to a successful bettor is less than that represented by the true chance of the event occurring. This profit is known as the 'over-round' on the 'book' the 'book' refers to the old-fashioned ledger in which wagers were recorded, and is the derivation of the term 'bookmaker' and relates to the sum of the 'odds' in the following way:. The true odds against winning for each of the three horses are , and respectively.
This represents the odds against each, which are , and , in order. This value of 30 represents the amount of profit for the bookmaker if he gets bets in good proportions on each of the horses. And the expected value of his profit is positive even if everybody bets on the same horse. The art of bookmaking is in setting the odds low enough so as to have a positive expected value of profit while keeping the odds high enough to attract customers, and at the same time attracting enough bets for each outcome to reduce his risk exposure.
A study on soccer betting found that the probability for the home team to win was generally about 3. It was about 3. Making a profit in gambling involves predicting the relationship of the true probabilities to the payout odds. Sports information services are often used by professional and semi-professional sports bettors to help achieve this goal.
The odds or amounts the bookmaker will pay are determined by the total amount that has been bet on all of the possible events. They reflect the balance of wagers on either side of the event, and include the deduction of a bookmaker's brokerage fee "vig" or vigorish. From Wikipedia, the free encyclopedia. This article is about the gambling and statistical term. For the alternative rock band, see Odds band. For playing chess with odds, i. For the documentary film, see The Odds Against.
Main article: Moneyline odds. Main article: Mathematics of bookmaking. Retrieved 18 August Wolfram Research Inc. Retrieved 16 May CRC Press. Multi-State Lottery Association. Archived from the original on 19 October Wolfram Alpha. Retrieved 27 March World Bet Exchange. Archived from the original on 2 May Retrieved 10 December Archived from the original on 2 April Retrieved 26 November Expected Values and variance in bookmaker payouts: A Theoretical Approach towards setting limits on odds.
Journal of Prediction Markets. October Categories : Randomness Statistical ratios Wagering. Hidden categories: All articles with unsourced statements Articles with unsourced statements from May Use dmy dates from September Namespaces Article Talk. Views Read Edit View history. Help Learn to edit Community portal Recent changes Upload file. You may find that your favourite online betting site presents the odds exactly how you likely them to be.
But sometimes you might need to convert them to understand. Our odds converter tool will allow you see odds in whatever format you like. Betting odds represent the probability of an event to happen and therefore enable you to work out how much money you will win if your bet wins.
Hopefully, that is betting odds explained. You should now have the knowledge to read betting odds, understand how likely it is to happen, and how much you stand to win. To know more about our writers and our ranking method you can learn more about MyBettingSites.
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