Odds
Odds for different outcomes in single bet are presented either in European format (decimal odds), UK format (fractional odds), or American format (moneyline odds). European format (decimal odds) are favored in continental Europe, Canada, and Australia. They are the ratio of the full payout to the stake, in a decimal format. Decimal odds of 2.00 are an even bet. UK format (fractional odds) are favored by British bookmakers. They are the ratio of the amount won to the stake. Fractional odds of 1/1 are an even bet. US format odds are favored in the United States. They are the amount won on a 100 stake when positive and the stake needed to win 100 when negative. US odds of 100 are an even bet.
| Decimal | Fractional | US | HongKong | Indo | Malay |
| 1.50 | 1/2 | -200 | 0.50 | -2.00 | 0.50 |
| 2.00 | Evs (1/1) | +100 | 1.00 | 1.00 | 1.00 |
| 2.50 | 3/2 | +150 | 1.50 | 1.50 | -0.67 |
| 3.00 | 2/1 | +200 | 2.00 | 2.00 | -0.50 |
| x | To | Do this |
|---|---|---|
| Decimal | Fractional | x-1, then convert to fraction |
| Decimal | US | 100*(x-1) if x>=2; -100/(x-1) if x<2 |
| Fractional | Decimal | divide fraction, then x+1 |
| Fractional | US | divide fraction, then 100*x if x>=1; -100/x if x<1 |
| US | Decimal | (x/100)+1 if x>0; (-100/x)+1 if x<0 |
| US | Fractional | x/100, then convert to fraction if x>0; -100/x, then convert to fraction if x<0 |
| Decimal | HongKong | x-1 |
| HongKong | Indo | x if x>=1; (1/x)*-1 if x<1 |
| HongKong | Malay | x if x<=1; (1/x)*-1 if X>1 |
In Asian betting markets, other frequently used formats for expressing odds include Hong Kong, Malaysian, and Indonesian-style odds formats. Odds are also quite often expressed in terms of implied probability, which corresponds to the probability with which the event in question would need to occur for the bet to be a breakeven proposition (on the average).
Many online tools also exist for automated conversion between these odds formats.
Read more about this topic: Sports Betting
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