Fraction | Decimal | American (Moneyline) | Implied Probability |
---|---|---|---|

% |

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Fraction | Decimal | American (Moneyline) | Implied Probability |
---|---|---|---|

1/5 | 1.2 | -500 | 83.3% |

2/9 | 1.22 | -450 | 81.8% |

1/4 | 1.25 | -400 | 80% |

2/7 | 1.29 | -350 | 77.8% |

1/3 | 1.33 | -300 | 75% |

4/11 | 1.36 | -275 | 73.3% |

4/9 | 1.44 | -225 | 69.2% |

1/2 | 1.5 | -200 | 66.7% |

1/1 | 2 | 100 | 50% |

5/4 | 2.25 | 125 | 44.4% |

9/1 | 10 | 900 | 10% |

10/1 | 11 | 1000 | 9.1% |

20/1 | 21 | 2000 | 4.8% |

50/1 | 51 | 5000 | 2% |

100/1 | 101 | 10000 | 1% |

1000/1 | 1001 | 100000 | 0.1% |

There are 3 methods of stating odds that most bookmakers and websites support.

Implied Probability is also useful when evaluating a bet or checking how likely an outcome is.

- Fractions
- Used primarily in the UK and Ireland, fractions quote the potential
**profit**should the bet succeed, relative to the stake. For example if £5 is bet at odds of 2/1 the potential profit is £10 (£5 * 2) and the total returned is £15 (£10 plus the £5 stake). - Decimals
- Decimals quote the
**potential return**should the bet succeed, relative to the stake. For example if £5 is bet at odds of 3 the total returned is £15 (£5 * 3) the potential profit is £10 (£5 * 3 minus the £5 stake). - American - Moneyline
- Positive figures: The odds state the winnings on a £100 bet e.g. american odds of 110 would win £110 on a £100 bet.
- Negative figures: The odds state how much must be bet to win £100 profit e.g. american odds of -120 would win £100 on a £120 bet.

- Implied Probability
- Odds correlate to probability e.g a 3/1 bet is expected to win one in every 4 attempts, hence the probability is 25%.

**Decimal**- 1 divided by the decimal odds, multiplied by 100 to give a percentage e.g. decimal odds of 2 = (1/2) * 100 = 50%.**Fraction**- 1 divided by (the fractional odds plus 1), multiplied by 100 to give a percentage. e.g. fractional odds of 3/1 = (1 / ((3/1) + 1)) * 100 = 25%.**American:****Positive odds**- 100 divided by (the american odds plus 100), multiplied by 100 to give a percentage e.g. american odds of 150 = (100 / (150 + 100)) * 100 = 40%.**Negative odds**- Firstly multiply the american odds by -1 and use the positive value in the following formula: american odds divided by (the american odds plus 100), multiplied by 100 to give a percentage e.g. american odds of -300 = (300/(300+100)) * 100 = 75%.

**Decimal**- 1 divided by (the percentage divided by 100) e.g. a probability of 50% = 1 / (50 / 100) = 2.**Fraction**- (1 divided by (the percentage divided by 100)) minus 1 e.g. a probability of 25% = (1 / (25 / 100)) - 1 = 3 = 3/1.**American:****Positive odds**- (100 divided by (the percentage divided by 100)) minus 100 e.g. a probability of 10% = (100 / (10 / 100)) - 100 = 900.**Negative odds**- The probability divided by (1 minus (the probability divided by 100)) then multiply by -1 to convert into a negative e.g. a probability of 60% = (60 / (1 - (60/100))) * -1 = -150.

**Positive odds**- 1 plus (the american odds divided by 100) e.g. american odds of 300 = 1 + (300/100) = 4.**Negative odds**- 1 minus (100 divided by the american odds) e.g. american odds of -300 = 1 - (100/-300) = 1.333.

**Positive odds**- The american odds dividend by 100 e.g. american odds of 300 = 300/100 = 3/1.**Negative odds**- Minus 100 divided by the american odds e.g. american odds of -300 = -100/-300 = 1/3.

Add 1 to the fractional representation e.g. a fractional value of 3/1 = (3/1) + 1 = 4.

**Positive american odds**- The fractional value multiplied by 100 e.g. a fractional odds of 3/1 = (3/1) * 100 = 300.**Negative american odds**- Negative 100 divided by the fractional odds e.g. a fractional value of 1/5 = -100 / (1/5) = -500.

Subtract 1 from the decimal representation e.g. a decimal value of 3 = 3 - 1 = 2 which is commonly expressed as 2/1.

**Positive american odds**- (The decimal value minus one) multiplied by 100 e.g. a decimal value of 3 = (3 - 1) * 100 = 200.**Negative american odds**- Negative 100 divided by (the decimal odds minus one) e.g. a decimal value of 1.2 = -100 / (1.2 - 1) = -500.

Betting Calculator - Enter your odds and stake to calculate bet returns for all types of sport wager. Supports all major formats including decimal, fraction and american.

Dutching Calculator - Odds changed since you placed your last bet? Use this calculator to work out the stakes necessary to guarantee a fixed return irregardless of the outcome. This approach is most often using by punters comfortable with exchange betting as odds fluctuate more frequently.