To convert decimal odds to fractional, subtract 1.00 and then find the nearest whole integer (so for example 3.75 - 1.00 becomes 2.75/1, or 11/4). To convert US odds to decimal, if the US odds are positive, divide by 100 and add 1. If it is negative, divide 100 by the US odds (without the minus sign) and add 1. The simple formular to convert from fraction odds to decimal is to divide the numerator (top number) by the denominator (bottom number) and add 1. The 1 represents the returned stake which is included in the decimal odds but not in the fraction odds. Example 1: Odds of 2/1, will be 2 divided by 1, which gives 2, then add 1 equals 3. Fractional Odds – Fractional Odds are used in the UK and Ireland. Here the first number is the amount to be won, and the second number is the stake. So for examples 4/1 is stake 1 to win 4, and 10/11 is stake 11 to win 10. To calculate how much a winning bet will profit, convert the fraction to a decimal and multiply it by the stake. Odds converter errors Keep in mind that when rounding values on odds converter you might see some discrepancies. For example, when you use an odds converter to convert decimal 1.33 you get 1/3 fractional and -300 american but if you convert 1/3 to american you might see -303.03. Fractional odds represent the profit - 5/1 means you will win five pounds for every one pound staked - whereas decimal odds represent the return - 2.2 means you will receive £2.20 for every £1.

• Fraction Decimal Odds Converter Excel
• Fraction Decimal Odds Converter Freeware
• Decimal To Fraction Chart

Use the tool below to convert odds between American, decimal, fractional and percentage formats.

Betting Odds Explained

American Odds – American Odds are the default odds format at most US friendly betting sites as well as Nevada sports books. Here odds are expressed as either a negative or a positive number. When positive the odds represent how much a player will profit on a successful $100.00 wager. So for example if the odds are +180 a successful $100 bet will return $280 (the $100 stake + $180.00 win). When the odds are negative they represent how much a bettor must stake to win $100. Therefore $150 staked at -150 returns $250.00 (the $150 stake + $100 win).

Decimal Odds – Decimal Odds, also referred to as European Odds, are used in most European countries and are the default option of many Asian bookies as well. This is the easiest odds format to understand as the odds represent how much a 1 unit wager returns. For example a €1 wager at odds 1.91 returns €1.91. This return includes both your stake plus profit; to calculate how much your return will be simply multiple your stake by the given odds.

Fractional Odds – Fractional Odds are used in the UK and Ireland. Here the first number is the amount to be won, and the second number is the stake. So for examples 4/1 is stake 1 to win 4, and 10/11 is stake 11 to win 10. To calculate how much a winning bet will profit, convert the fraction to a decimal and multiply it by the stake. For example 3/2=1.5, so, if wagering at 3/2 a successful bet will return 1.5 times your stake in winnings and will also return your stake.

Implied Probability – Implied Probability is how often a bet must win to average break even. This is calculated as risk/return, so for example +200 in American format (3.00 European) is risk $100 to win $200 so a winning wager returns $300 ($100 stake + $200 win). Therefore the implied probability of +200 is $100/$300= 0.3333, which is 33.33%. For this reason you should only wager at +200 if you think the probability of winning is greater than 33.33%.

On the topic of odds, refer to our No-Vig Calculator for a better understanding of how betting odds work.

Use the calculator below to convert betting odds into any betting odds format.

Around the world, there are several methods used to present betting odds. Ultimately they all represent the perceived percentage chance of success, but to the uninitiated the different odds displays can be confusing. Here we break down just what each of the popular methods mean:

Decimal Odds

Decimal odds are widely used around Europe and are the display format of choice for the betting exchanges around the world. They are also incorporated in Asian Handicap betting which is quickly becoming a popular way of gambling on football and other events, and, to many, decimal odds are the most straightforward representation of probabilities. The odds that are presented illustrate the return that you will receive if your bet is successful, to a unit stake of 1. Therefore, if the decimal odds on a football team are 4.50, and you stake £10, the return if the bet goes in would be £45 and the profit would be £35 (4.5 – 1, multiplied by stake).

Any decimal odds that are less than 2.0 indicated that the selection has a more than 50% chance of success, as the outlay is greater than the return. For instance, a bet of £50 on a 1.60 chance would return £80 (£50 stake + £30 profit).

Fractional Odds

Fractional odds have been the choice in the UK for centuries. They are still used today on racecourses, football coupons and betting adverts. To a beginner, fractional odds may seem a little more difficult to grasp that decimal odds.

Examples of fractional odds include 7/4, 4/1, 5/2 and 11/4. In order to obtain ‘the multiplier’, the top number should be divided by the bottom number. For instance 7 divided by 4 gives 1.75. This 1.75 multiplied by your stake will be the profit on the bet, but don’t forget to add on your stake to get the total return.

E.g. £40 is placed on a horse whose odds are 5/2. The horse wins.

Stake: £40
Multiplier: 5 divided by 2 = 2.5
Profit: 2.5 x 40 = £100
Return: Stake (£40) + Profit (£100) = £140

When converting fractional odds to decimal odds, the calculation requires you to add the multiplier + 1 (which acts as the stake). For instance, 6/4 express in decimal odds is 1.5 + 1 = 2.50 (decimals always expressed to two places)

If the number at the bottom of the fractional odds is larger than the number at the top, then the selection is ‘odds on’ – it is deemed to have more than a 50% chance of success. The larger the bottom number compared to the top number, the higher the probability.

Moneyline (US) odds

For some events such as horse racing, US betting sites adopt fractional odds. However for many sports and markets such as American Football, Boxing etc. ‘moneyline’ odds are used. These moneyline odds are generally used for an event with two outcomes.

Moneyline odds are worked out to a bet of $100. If the figure for a team is positive, then it refers to how much profit will be made based on a $100 dollar wager. For example, if the Denver Broncos were available for a match at +120, for every $100 staked, the profit would be $120 and the total return would be $220. Positive odds are used for the outcome which is deemed to be less likely.

A negative figure on the moneyline indicates a betting favourite and indicates how much needs to be staked to win $100. Betting on a Floyd Mayweather fight (where he is always a heavy favourite), punters are likely to see odds of -700 for the undefeated star. This means that $700 will have to be staked to make $100 profit. The total return would be $800.

Even money shots indicate that there is a 50% chance of success and in theory could be expressed as -100 or +100, as ultimately $100 staked at these odds equals $100 profit. Read about US Moneyline odds in more detail.

Hong Kong odds

Hong Kong odds are unsurprisingly adopted by many Asian bookmakers. The odds are fairly simple to work out in format and are a cross between decimal and fractional odds in their presentation, in that they exhibit the net return similar to fractional odds, but are presented in a decimal format.

To understand Hong Kong odds, the punter should assume that they are placing a 1 unit bet on a selection. The odds reflect the profit that will be obtained from striking that bet. Any odds that are less than 1, indicate the bet is ‘odds on’ i.e. has more than a 50% chance of success.

E.g.

HK odds of 0.4 = 0.4 units profit for every 1 staked. (Fractional odds of 2/5)
HK odds of 5 = 5 units profit for every 1 staked (Fractional odds of 5/1)

Indonesian odds

Indonesian odds follow the same format as US odds, but just use a different stake to illustrate the probabilities of each outcome. Whereas with US betting odds returns are calculated a stake of 100, in Indonesia, they are calculated to a stake of 1. Again, odds with a – sign before them demonstrate how much is required to be staked to win 1 unit, whilst the + sign is disregarded for the ‘outsider’ bets which show how much profit can be obtained for a 1 unit stake. Read further about Indonesian odds here.

Fraction Decimal Odds Converter Excel

E.g:

Manchester United are playing Newcastle at home. Manchester United are available at Indonesian odds of -3.0 to win the game. This means a 3 unit bet will give a 1 unit profit and total return of 4 unit.

Andy Murray is playing Rafa Nadal in France on a clay court. Murray is available at Indonesian odds of 2.25 to win the match. This means for every 1 unit staked, if Murray wins, 2.25 units will be made in profit, with a return of 3.25.
Even money bets are quoted as 1.00.

Malay odds

Malay odds are effectively the opposite of US odds. They also work on positive/negative system of display, but in reverse to that adopted in America. If the number is positive, then it indicates what you will receive for an outlay of 1 unit. For example, odds of 0.75 would indicate that for 1 unit stakes, 0.75 units profit would be derived. When the odds are negative, they indicate the bet has a less than 50% chance of success. So a bet which was -0.05 would require just 0.05 units to be staked to win 1. An even money bet is indicated as 0. Read more on this here.

Fraction Decimal Odds Converter Freeware

E.g.

1. A horse is available at odds of -0.40. This would require an outlay over 0.4 units to win 1 unit. In decimal terms this equates to odds of 3.5

Decimal To Fraction Chart

2. Arsenal are at home to Ipswich in the FA Cup. Arsenal can be backed at 0.25. This means for every 1 unit placed on Arsenal, 0.25 units profit will be made.