Enter Your Odds (Converts Automatically)

Fraction Decimal American Implied Probability

Odds Conversion Table

FractionDecimalAmericanImplied Probability
1/51.20-50083.3%
2/91.22-45081.8%
1/41.25-40080%
2/71.29-35077.8%
3/101.30-333.376.9%
1/31.33-30075%
4/111.36-27573.3%
4/91.44-22569.2%
1/31.33-30075%
5/42.2512544.4%
11/82.38137.542.1%
9/110.0090010%
10/111.0010009.1%
20/121.0020004.8%
50/151.0050002%
100/1101.00100001%
1000/11001.001000000.1%

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
  • 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 -90 would win £100 on a £90 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%.

Also See

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.