Convert American Odds To Fractional
Convert odds between Fractional, American and Decimal format and see the implied odds at each. Learn how to convert betting odds using our odds conversion formulas.
The odds converter tool in this page will convert odds from any of the three main formats into the other formats. It will also calculate the relevant implied probability too. To use it, simply enter the odds you wish to convert in the appropriate box, and then click the “Convert Odds” button. The most common odds formats are decimal, American and fractional. The formulas below explain how to convert odds to implied probabilities. For the examples below we will use Smarkets odds for the 2016 Australian Open final between Andy Murray and Novak Djokovic.
| Fractional | American | Decimal | Implied Odds |
|---|---|---|---|
| 1/10 | -1000 | 1.1 | 91% |
| 1/9 | -910 | 1.11 | 90% |
| 1/8 | -833 | 1.12 | 89% |
| 1/7 | -714 | 1.14 | 88% |
| 1/6 | -588 | 1.17 | 85% |
| 1/5 | -500 | 1.2 | 83% |
| 2/9 | -455 | 1.22 | 82% |
| 1/4 | -400 | 1.25 | 80% |
| 2/7 | -344 | 1.29 | 78% |
| 3/10 | -333 | 1.3 | 77% |
| 1/3 | -303 | 1.33 | 75% |
| 4/11 | -278 | 1.36 | 74% |
| 2/5 | -250 | 1.4 | 71% |
| 4/9 | -227 | 1.44 | 69% |
| 1/2 | -200 | 1.5 | 67% |
| 8/15 | -189 | 1.53 | 65% |
| 4/7 | -175 | 1.57 | 64% |
| 8/13 | -161 | 1.62 | 62% |
| 4/6 | -149 | 1.67 | 60% |
| 8/11 | -136 | 1.73 | 58% |
| 4/5 | -125 | 1.8 | 56% |
| 5/6 | -120 | 1.83 | 55% |
| 10/11 | -110 | 1.91 | 52% |
| 1/1 | 100 | 2 | 50% |
| 11/10 | 110 | 2.1 | 48% |
| 6/5 | 120 | 2.2 | 45% |
| 5/4 | 125 | 2.25 | 44% |
| 11/8 | 138 | 2.38 | 42% |
| 6/4 | 150 | 2.5 | 40% |
| 13/8 | 163 | 2.63 | 38% |
| 7/4 | 175 | 2.75 | 36% |
| 9/5 | 180 | 2.8 | 36% |
| 15/8 | 186 | 2.86 | 35% |
| 2/1 | 200 | 3 | 33% |
| 85/40 | 212 | 3.12 | 32% |
| 11/5 | 220 | 3.2 | 31% |
| 9/4 | 225 | 3.25 | 31% |
| 12/5 | 240 | 3.4 | 29% |
| 5/2 | 250 | 3.5 | 29% |
| 13/5 | 260 | 3.6 | 28% |
| 11/4 | 275 | 3.75 | 27% |
| 3/1 | 300 | 4 | 25% |
| 10/3 | 333 | 4.33 | 23% |
| 7/2 | 350 | 4.5 | 22% |
| 4/1 | 400 | 5 | 20% |
| 9/2 | 450 | 5.5 | 18% |
| 5/1 | 500 | 6 | 17% |
| 11/2 | 550 | 6.5 | 15% |
| 6/1 | 600 | 7 | 14% |
| 13/2 | 650 | 7.5 | 13% |
| 7/1 | 700 | 8 | 13% |
| 15/2 | 750 | 8.5 | 12% |
| 8/1 | 800 | 9 | 11% |
| 17/2 | 850 | 9.5 | 11% |
| 9/1 | 900 | 10 | 10% |
| 10/1 | 1000 | 11 | 9% |
| 11/1 | 1100 | 12 | 8% |
| 12/1 | 1200 | 13 | 8% |
| 14/1 | 1400 | 15 | 7% |
| 15/1 | 1500 | 16 | 6% |
| 16/1 | 1600 | 17 | 6% |
| 18/1 | 1800 | 19 | 5% |
| 20/1 | 2000 | 21 | 5% |
| 25/1 | 2500 | 26 | 4% |
| 33/1 | 3300 | 34 | 3% |
| 40/1 | 4000 | 41 | 2% |
| 50/1 | 5000 | 51 | 2% |
| 66/1 | 6600 | 67 | 1% |
How Do Fractional Odds Work
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.
Convert American Odds To Fractional Distillation
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.
Convert American Odds To Fractional Odds
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.