Type in any box and the others update: fractional, decimal, American and implied probability.
Type in any box. Fractional accepts 5/2 or evs; American needs a + or - sign.
Common UK fractional prices with their decimal and American equivalents and the chance each one implies.
| Fractional | Decimal | American | Implied chance |
|---|---|---|---|
| 1/10 | 1.10 | -1000 | 90.9% |
| 1/9 | 1.111 | -900 | 90.0% |
| 1/8 | 1.125 | -800 | 88.9% |
| 2/17 | 1.118 | -850 | 89.5% |
| 1/7 | 1.143 | -700 | 87.5% |
| 2/13 | 1.154 | -650 | 86.7% |
| 1/6 | 1.167 | -600 | 85.7% |
| 2/11 | 1.182 | -550 | 84.6% |
| 1/5 | 1.20 | -500 | 83.3% |
| 2/9 | 1.222 | -450 | 81.8% |
| 1/4 | 1.25 | -400 | 80.0% |
| 2/7 | 1.286 | -350 | 77.8% |
| 3/10 | 1.30 | -333.33 | 76.9% |
| 1/3 | 1.333 | -300 | 75.0% |
| 4/11 | 1.364 | -275 | 73.3% |
| 2/5 | 1.40 | -250 | 71.4% |
| 4/9 | 1.444 | -225 | 69.2% |
| 1/2 | 1.50 | -200 | 66.7% |
| 8/15 | 1.533 | -187.5 | 65.2% |
| 4/7 | 1.571 | -175 | 63.6% |
| 3/5 | 1.60 | -166.67 | 62.5% |
| 8/13 | 1.615 | -162.5 | 61.9% |
| 4/6 | 1.667 | -150 | 60.0% |
| 8/11 | 1.727 | -137.5 | 57.9% |
| 4/5 | 1.80 | -125 | 55.6% |
| 5/6 | 1.833 | -120 | 54.5% |
| 10/11 | 1.909 | -110 | 52.4% |
| 20/21 | 1.952 | -105 | 51.2% |
| Evens | 2.00 | +100 | 50.0% |
| 21/20 | 2.05 | +105 | 48.8% |
| 11/10 | 2.10 | +110 | 47.6% |
| 6/5 | 2.20 | +120 | 45.5% |
| 5/4 | 2.25 | +125 | 44.4% |
| 11/8 | 2.375 | +137.5 | 42.1% |
| 6/4 | 2.50 | +150 | 40.0% |
| 13/8 | 2.625 | +162.5 | 38.1% |
| 7/4 | 2.75 | +175 | 36.4% |
| 15/8 | 2.875 | +187.5 | 34.8% |
| 2/1 | 3.00 | +200 | 33.3% |
| 85/40 | 3.125 | +212.5 | 32.0% |
| 9/4 | 3.25 | +225 | 30.8% |
| 5/2 | 3.50 | +250 | 28.6% |
| 11/4 | 3.75 | +275 | 26.7% |
| 3/1 | 4.00 | +300 | 25.0% |
| 100/30 | 4.333 | +333.33 | 23.1% |
| 7/2 | 4.50 | +350 | 22.2% |
| 4/1 | 5.00 | +400 | 20.0% |
| 9/2 | 5.50 | +450 | 18.2% |
| 5/1 | 6.00 | +500 | 16.7% |
| 11/2 | 6.50 | +550 | 15.4% |
| 6/1 | 7.00 | +600 | 14.3% |
| 13/2 | 7.50 | +650 | 13.3% |
| 7/1 | 8.00 | +700 | 12.5% |
| 15/2 | 8.50 | +750 | 11.8% |
| 8/1 | 9.00 | +800 | 11.1% |
| 17/2 | 9.50 | +850 | 10.5% |
| 9/1 | 10.00 | +900 | 10.0% |
| 10/1 | 11.00 | +1000 | 9.1% |
| 11/1 | 12.00 | +1100 | 8.3% |
| 12/1 | 13.00 | +1200 | 7.7% |
| 14/1 | 15.00 | +1400 | 6.7% |
| 16/1 | 17.00 | +1600 | 5.9% |
| 18/1 | 19.00 | +1800 | 5.3% |
| 20/1 | 21.00 | +2000 | 4.8% |
| 25/1 | 26.00 | +2500 | 3.8% |
| 33/1 | 34.00 | +3300 | 2.9% |
| 40/1 | 41.00 | +4000 | 2.4% |
| 50/1 | 51.00 | +5000 | 2.0% |
| 66/1 | 67.00 | +6600 | 1.5% |
| 80/1 | 81.00 | +8000 | 1.2% |
| 100/1 | 101.00 | +10000 | 1.0% |
| From | To | Formula |
|---|---|---|
| Fractional a/b | Decimal | a / b + 1 |
| Decimal d | Fractional | (d - 1) as a fraction |
| Decimal d of 2.0 or more | American | +(d - 1) x 100 |
| Decimal d under 2.0 | American | -100 / (d - 1) |
| American +A | Decimal | A / 100 + 1 |
| American -A | Decimal | 100 / A + 1 |
| Any | Implied probability | 1 / decimal |
UK bookmakers keep some traditional fractions that don't reduce, such as 4/6, 6/4 and 100/30. The converter shows those where they match.
Go through decimal odds. Fractional to decimal: divide and add 1 (9/4 = 3.25). Decimal to American: if 2.0 or more, subtract 1 and multiply by 100 (+225); if under 2.0, divide -100 by (decimal minus 1).
Decimal = fractional + 1. American = (decimal - 1) x 100 for prices of evens or bigger, and -100 / (decimal - 1) for odds-on prices. Implied probability = 1 / decimal.
Evens (1/1) is 2.0 in decimal and +100 in American, and implies a 50% chance.
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