Odds conversion table
The same price written three ways, with the probability each notation implies. Implied probability is derived directly from the price: a minus price divided by itself plus a hundred, a plus price as a hundred divided by the price plus a hundred.
American, decimal and fractional prices with the probability each implies.
| American | Decimal | Fractional | Implied probability |
|---|---|---|---|
| -400 | 1.25 | 1/4 | 80.0% |
| -300 | 1.33 | 1/3 | 75.0% |
| -250 | 1.40 | 2/5 | 71.4% |
| -200 | 1.50 | 1/2 | 66.7% |
| -150 | 1.67 | 2/3 | 60.0% |
| -125 | 1.80 | 4/5 | 55.6% |
| -110 | 1.91 | 10/11 | 52.4% |
| +100 | 2.00 | 1/1 | 50.0% |
| +110 | 2.10 | 11/10 | 47.6% |
| +125 | 2.25 | 5/4 | 44.4% |
| +150 | 2.50 | 3/2 | 40.0% |
| +200 | 3.00 | 2/1 | 33.3% |
| +250 | 3.50 | 5/2 | 28.6% |
| +300 | 4.00 | 3/1 | 25.0% |
| +400 | 5.00 | 4/1 | 20.0% |
| +750 | 8.50 | 15/2 | 11.8% |
| +1000 | 11.00 | 10/1 | 9.1% |
Adding the implied probabilities of both sides of a two-way market gives a total above one hundred per cent; the excess is the margin described in the entry on the vigorish.