Calculate Implied Probability of any odds format. Also converts odds between US, decimal, fractional, percentage, Hong Kong, Indonesian, and Malay formats.
Odds Calculator Inputs-Outputs
US Odds: Odds in US format (a negative number expresses the dollar amount that would need to be wagered in order to win $100, while a positive number expresses the dollar amount that would be won from a $100 wager)
Decimal Odds: Odds in decimal format (expresses the amount that would be returned from a $1 bet *inclusive* of original stake)
Fractional Odds: Odds in fractional format (expresses the fraction of a dollar that would be won from a $1 bet)
Implied Probability: The win probability that would imply zero vig on the offered line
Hong Kong Odds: Odds in Hong Kong format
Indonesian Odds: Odds in Indonesian format
Malay Odds: Odds in Malaysian format
How to use this odds conversion & implied probability tool
This odds conversion tool converts between US, decimal, fractional, Hong Kong, Indonesian, Malay odds, and implied probability. Enter any one of the seven and the other six will be computed and displayed.
About International Odds Displays
There are three major formats in which most online sportsbooks quote odds:
US Style or “Moneyline”.
European Style or “Decimal” style (aka “European” or “continental”).
Traditional or “Fractional” style (aka “British” or “traditional”).
Many Asian oriented sportsbook will also quote odds in “Hong Kong” style, “Indonesian” style, and “Malaysian” style formats.
US-style odds (most common, not surprisingly, found in the United States) are quoted as either a positive or a negative number.
When quoted as a negative number the betting odds figure represents the unit amount a bettor would need to risk in order to win 100 units. Hence, US odds of -200 imply a bettor would need to risk $200 in order to win $100 (so were he to win he would receive the $200 initial stake plus $100 in winnings).
When quoted as a positive number the odds figure represents the unit amount a player would win were he to risk 100 units.
Hence, US odds of +200 imply a bettor would need to risk $100 in order to win $200 (so were he to win he would receive the $100 initial stake plus $200 in winnings).
Using US-style odds, even odds bets are quoted as +100.
Decimal-style odds (most common outside the US, UK, and Ireland) are quoted as a positive number greater than 1 (typically displayed to 2 or more decimal places).
It represents the number of dollars that would be returned if the bet wins including the initial stake.
Hence, decimal odds of 1.5000 imply that if a $1 bet were to win, $1.50 would be returned to the bettor (the $1 initial stake plus $0.50 in winnings), while decimal odds of 3.0000 imply that if a $1 bet were to win $3 would be returned to the bettor (the $1 initial stake plus $2 in winnings).
Decimal odds of 1.5000 and 3.0000 are the equivalents of US odds of -200 and +200, respectively. Using decimal-style odds, even odds bets are quoted as 2.0000.
Fractional-style odds (most common in the UK and Ireland) are quoted as a fraction indicating the amount that would be paid out relative to a given stake.
Fractional odds of 1/2 imply that the bet would pay out 1 unit for every 2 units risked, while fractional odds of 2/1 imply that the bet would pay out $2 for every $1 risked. Fractional odds of 1/2 and 2/1 are the equivalents of US odds of -200 and +200, respectively.
Using fractional-style odds, an even odds bet would be quoted as 1/1.
Hong Kong-style odds are quoted as a positive number greater than 0 (typically displayed to 2 or more decimal places).
It represents the number of units that would be collected won in excess of the initial stake were the bet to win.
Hong Kong odds of 0.5000 imply that if a $1 bet were to win, the bettor would would collect $0.50 in winngs plus his initial $1 stake, while Hong Kong odds of 2.0000 imply that if a $1 bet were to win, the bettor would would collect $2 in winngs plus his initial $1 stake.
Hong Kong odds of 0.5000 and 2.0000 are the equivalents of US odds of -200 and +200, respectively.
Using Hong Kong-style odds, an even odds bet would be quoted as 1.0000.
Indonesian-style odds are quoted as a number with absolute value greater than 1 (typically displayed to 2 or more decimal places).
When Indonesian odds are positive they are interpretted in the same manner as Hong Kong odds, so Indonesian odds of 2.0000 imply that if a $1 bet were to win, the bettor would would collect $2 in winngs plus his initial $1 stake.
When quoted as a negative number the odds figure represents the unit amount a bettor would need to risk in order to win 1 units.
Indonesian odds of -2.0000 imply a bettor would need to risk $2 in order to win $1 (so were he to win he would receive the $2 initial stake plus $1 in winnings).
Indonesian-style odds always have one-tenth the value of their US-style counterparts. Hence Indonesian-style odds of -2.0000 and 2.0000 are the equivalents of US odds of -200 and +200, respectively.
Using Indonesian-style odds, an even odds bet would be quoted as 1.0000.
Malay-style odds are quoted as a number with absolute value no greater than 1 (typically displayed to 2 or more decimal places).
When Malay odds are positive they are interpretted in the same manner as Hong Kong odds, so Malay odds of 0.5000 imply that if a $1 bet were to win, the bettor would would collect $0.50 in winngs plus his initial $1 stake.
When quoted as a negative number the odds figure represents the unit amount a bettor would need to risk in order to win 1 units.
Malay odds of -0.5000 imply a bettor would need to risk $0.50 in order to win $1 (so were he to win he would receive the $0.50 initial stake plus $1 in winnings).
Malay-style odds of 0.5000 and -0.5000 are the equivalents of US odds of -200 and +200, respectively.
Using Malay-style odds, an even odds bet would be quoted as 1.0000.
(In all odds formats even odds bets may be quoted as “Even”, “Evens” or ‘Ev.”.)
Associated with any given odds quotation is the win probability implied by those odds. This represents the probability with which the underlying event would need to occur to justify those odds. If the real probability were greater than the implied probability then the bet would be a good bet, while if it were lower it would be a bad bet. If the real probability were equal to the implied probability then the bet would be break-even.
Be sure to check out the rest of our incredibly useful sports betting tools here on sportsbookreview and then head over to our sports betting forum to discuss the latest lines and plays from our community of handicappers.
Shrewd sports bettors can use hedging and arbitrage to lock in a guaranteed profit regardless of the result of a sporting event. Hedging your bets allows you to take advantage of line changes to cover every potential outcome and assure yourself of a profit. Arbitrage involves seizing upon discrepancies in the odds offered by rival sports betting sites. You can then cover each potential result and guarantee a risk-free profit, no matter what the result is.
Why Use an Odds Converter?
You will often see betting odds rendered in different formats, and it helps to be able to quickly convert them to your preferred format. American odds are naturally popular among US bettors, while UK bettors generally use fractional odds and decimal odds are prevalent across Europe. However, even in the US you will generally find fractional odds used in horse racing odds. Some picks articles will present odds in decimal format, and it can be easier to work out parlays in decimal odds. There are also Asian formats to bear in mind at times.
If you understand how to convert odds, like for example NFL odds, you can make the calculations manually. However, you might make an error, and this is a time-consuming process, so it makes sense to use this betting odds converter to quickly convert between American odds, decimal odds, fractional odds, probability odds and so on. You should bookmark this odds converter page and use it to help you make a success of sports betting. It can also help you quickly figure out the profit you would make based on your bet amount when you place a bet.
How to Use the Odds Converter
Enter the odds you wish to convert into any of the boxes in the betting odds converter and click on “Convert”. It will then display the equivalent odds in all the different formats. For example, if you enter American odds of -125 into the US odds box, it will tell you that this equates to 1.8000 in decimal odds, 4/5 in fractional odds, 0.8000 in Hong Kong style, -1.2500 in Indonesian style and 0.8000 in Malay style, with an implied probability of 55.56%.
Understanding the Different Odds Format
The three most common formats are American odds, decimal and fractional, but sportsbooks of Asian origin may quote Hong Kong, Indonesian and Malay odds too. Read on to learn what they all mean and the level of profit you can expect.
American odds start with a plus or a minus symbol. If the line starts with a plus, it tells you the amount of profit you would earn from a $100 bet if your wager proves to be successful. For example, American odds of +150 mean you would earn a $150 profit from a successful $100 bet. American odds of +300 mean you would earn a $300 profit. You also get your stake back if your bet is successful, so your total return would be $400. You do not actually have to bet $100. That is just a guide. For instance, you could bet $20 at +150 and make a $30 profit if successful, or you could bet $5,000 at +300 and make a $15,000 profit if successful.
Odds that start with a plus are known as positive odds. If the line starts with a minus symbol, they are known as negative odds. In that case, it tells you the amount you would need to wager in order to generate a $100 profit. American odds of -110 tell you that you must wager $110 to earn a $100 profit. You also get your stake back if you bet is a winner, so your return would be $210. Once again, you can wager any amount you choose. A $50 bet at odds of -200 would earn you a $25 profit if it were successful. If one team has negative odds and the opposition has positive odds, the team with negative odds is the favorite and the team with positive odds is the underdog.
Decimal odds are often used outside of the US, UK and Ireland. They tell you the return you should expect to receive based on your bet amount if your bet pays off. The figure includes the profit you stand to earn plus the return of your stake. American odds of +200 would become 3.00 in decimal format. You multiply your stake (bet amount) by that figure in order to calculate your potential return. If you were to bet $100 at 3.00, you would expect a return of $300 if your prediction is correct. That includes a $200 profit and the return of your $100 stake.
Decimal odds of 1.50 would tell you that you would enjoy a return of $1.50 for every $1 you wager ($0.50 in winnings and your $1 stake returned). Decimal odds make it easier to work out the profit you stand to earn on a parlay. You can simply use our parlay calculator, which does all the hard work for you, in decimal odds or American odds, but if you prefer to work it out manually, you will need to convert the betting odds to decimal format first.
Fractional odds are also known as traditional odds. They are widely used at sports betting sites in the UK. In the US, you generally see the fractional format used at race tracks, as opposed to American odds. It therefore helps to be able to convert fractional odds to American odds if you generally prefer to use American odds. Fractional odds are quoted as a fraction indicating the amount that would be paid out relative to a given stake. Therefore, if you see fractional odds of 4/5, you would earn an $8 profit for every $10 you stake. Fractional odds of 4/5 are therefore equivalent to American odds of -125 and decimal odds of 1.80. If the fraction is smaller than 1, it is known as odds-on. Calculator users will notice that odds-on is the same as negative in American odds.
When you see fractional odds, the number to the left of the slash tells you the amount you will win by risking the number to the right of the slash. For example, if you see 7/4, you will know that you would earn a $7 profit for every $4 you wager. A $100 bet at 7/4 would earn you a $175 profit. This would be rendered as +175 in American format or 2.75 in decimal. You might see American odds of +100 referred to as even money or evens in the fractional format. This simply refers to odds of 1/1, and the odds converter can work that out for you.
Hong Kong Style
Hong Kong odds are similar to the decimal format, but they do not include the return of your stake. Decimal odds of 1.80 therefore become 0.80 in Hong Kong style, while decimal odds of 3.00 become 2.00 in Hong Kong style. It essentially represents the number of units that would be collected in excess of the initial stake were the bet to be successful. US odds of +200 would become 1.00 in the Hong Kong style.
These betting odds are very similar to US odds. If the odds are negative, it tells you the amount you need to wager in order to win $1. If they are positive, it tells you the profit you stand to earn by wagering $1. Therefore, US odds of -125 become -1.25 in Indonesian style, and -400 becomes -4.00. Positive odds do not actually start with a plus symbol in Hong Kong style, so +200 becomes 2.00, +250 becomes 2.50 and so on. It means that Indonesian odds are identical to Hong Kong odds when they are positive. You can play around with the betting odds converter to find several examples.
These betting odds are quoted as a number with absolute value no greater than 1. When Malay odds are positive, they are interpreted in the same manner as Hong Kong odds. If you see Malay odds of 0.5000, it tells you that would earn a $0.50 profit for each $1 you wager (and you would get your $1 bet amount back). When quoted as a negative number, the odds figure represents the unit amount a bettor would need to risk in order to win 1 unit. Therefore, Malay odds of -0.5000 imply a bettor would need to bet $0.50 in order to win $1. You would earn a $200 profit by wagering $100 at Malay odds of -0.5000.
The calculator will always display the implied probability of success that each set of odds represents. For example, +200 implies a probability of 33.33%, whereas -500 implies a probability of 83.33%. This implied probability equates to the probability with which the underlying event would need to occur to justify those odds. This applies to sports betting, horse racing, wagers for entertainment purposes, casino bet types and any other form of wager. Bettors are generally trying to find instances whereby the actual probability is greater than the implied probability odds, as this represents an attractive bet.
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