Odds Converter – Change Decimals, Fractions & Find Probability
Fractional
Decimal
American
Implied Probability
To use the converter, just enter a value into any field. It will automatically convert the odds into all of the other formats.
In addition to the calculator, the following resources on this page will help you:
1. Odds Conversion Table
2. Learn How To Convert Decimal Odds To Fractional
3. Learn How To Convert Decimal Odds To Fractional
4. Learn How to Work Out Implied Probability From Fractional Odds
5. Learn How to Work Out Implied Probability From Decimal Odds
Odds Conversion Table
| Fraction | Decimal | American | Implied Probability |
|---|---|---|---|
| 1/5 | 1.20 | -500 | 83.3% |
| 2/9 | 1.22 | -450 | 81.8% |
| 1/4 | 1.25 | -400 | 80% |
| 2/7 | 1.29 | -350 | 77.8% |
| 3/10 | 1.30 | -333.3 | 76.9% |
| 1/3 | 1.33 | -300 | 75% |
| 4/11 | 1.36 | -275 | 73.3% |
| 2/5 | 1.40 | -250 | 71.40% |
| 4/9 | 1.44 | -225 | 69.2% |
| 1/2 | 1.5 | -200 | 66.7% |
| 8/15 | 1.53 | -188 | 65.2% |
| 4/7 | 1.57 | -175 | 63.6% |
| 8/13 | 1.62 | -162 | 61.9% |
| 4/6 | 1.67 | -150 | 60% |
| 8/11 | 1.73 | -137 | 57.9% |
| 4/5 | 1.80 | -125 | 55.6% |
| 5/6 | 1.83 | -120 | 54.5% |
| 10/11 | 1.45 | -220 | 68.8% |
| Evens | 2.00 | 100 | 50% |
| 11/10 | 2.10 | 110 | 47.6% |
| 6/5 | 2.20 | 120 | 45.5% |
| 5/4 | 2.25 | 125 | 44.4% |
| 11/8 | 2.38 | 138 | 42.1% |
| 7/5 | 2.40 | 140 | 41.7% |
| 6/4 | 2.50 | 150 | 40% |
| 8/5 | 2.60 | 160 | 38.5% |
| 13/8 | 2.63 | 163 | 38.1% |
| 7/4 | 2.75 | 175 | 36.4% |
| 9/5 | 2.80 | 180 | 35.7% |
| 15/8 | 2.88 | 188 | 34.8% |
| 2/1 | 3.00 | 200 | 33.3% |
| 11/5 | 3.20 | 220 | 31.3% |
| 9/4 | 3.25 | 225 | 30.8% |
| 12/5 | 3.40 | 240 | 29.4% |
| 5/2 | 3.50 | 250 | 28.6% |
| 13/5 | 3.50 | 250 | 28.6% |
| 11/4 | 3.75 | 275 | 26.7% |
| 3/1 | 4.00 | 300 | 25% |
| 10/3 | 4.33 | 333 | 23.1% |
| 7/2 | 4.50 | 350 | 22.2% |
| 4/1 | 5.00 | 400 | 20% |
| 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% |
| 10/1 | 11.00 | 1000 | 9.1% |
| 11/1 | 12.00 | 1100 | 8.3% |
| 12/1 | 13.00 | 1200 | 7.7% |
| 13/1 | 14.00 | 1300 | 7.1% |
| 14/1 | 15.00 | 1400 | 6.7% |
| 15/1 | 16.00 | 1500 | 6.3% |
| 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% |
| 100/1 | 101.00 | 10000 | 1% |
How to Convert Fraction Odds to Decimals
Convert a fraction odd into a decimal odd by dividing the first number (the numerator), by the second number (the denominator), and adding 1.
Equation: (numerator/denominator) + 1 = decimal odds
Example: 6/5 is equal to 2.20. Divide 6 by 5. This equals 1.20. Add 1, and you had the decimal 2.20.
How To Convert Decimal Odds To Fractional
There are two steps to convert decimal odds into a fraction.
Step 1) Convert decimals odds into a fraction by subtracting 1, and using 1 as the denominator.
Example: 3.40 – 1 = 2.40. This creates the decimal odds of 2.40/1.
While this is a perfectly good fraction, bookmakers never use numbers with decimal points in fractionals. That is why we need step two.
Step 2) We now need to turn this fraction into its most simple form. Find the nearest whole integer (i.e. no decimal place). The factor to which you need to multiply the numerator to the whole integer is reflected in the denominator.
Example: You need to multiply 2.40 by 5 before it becomes a rounded number, 12. Therefore the fraction becomes 12/5. (2.40 x 2 = 4.80, 2.40 x 3 = 7.20, 2.40 * 4 = 9.60, 2.40 * 5 = 12)
How to Work Out Implied Probability From Fractional Odds
Divide the second number (denominator) by the total of the first number (numerator) and second number (denominator).
Equation: Denominator / (numerator+ denominator ) * 100 = implied probability
Example: 4/1 implied probability can be calculated as 1 / (4+1) * 100 = 20%
How to Work Out Implied Probability From Decimal Odds
Divide 1 by the decimal, and multiply it by 100%.
Equation: (1/ decimal odds) * 100 = implied probability
Example: 1 /4.00 * 100 = 25%
