1. At the bottom of each page, just above the page footer, you find 'View odds as:' which enables you to toggle between 'Fractional' and 'Decimal' odds. Once set, the page will remember your preference the next time you enter the site.
2. How to convert decimal odds to fractional odds. The easiest way is to use an odds converter, but if you’d like to calculate it yourself, minus one from the decimal, then convert to a fraction and reduce the fraction to its simplest form. For example for decimal odds of 1.90: 1.90 -1 = 0.9; convert to fraction = 9/10.

It is vital to know how to convert different betting odds so that you can play with a variety of bookmakers worldwide. In the United States of America, American odds are used, across Europe, Decimal odds are used. Fractional odds are a more traditional method that is mostly used in horse racing.

Decimal Odds Eg. 3.00 (equivalent of 2/1). Multiply the odds by the stake to work out the total return. For example a £100 bet which won at 3.00 will give a profit of £200 and a total return of £300.

Here is a step by step guide on how to convert the different odds types:

Decimal to Fractional conversion:

Let’s use a 1.75 decimal odd as an example:

• Remove 1 from the decimal odd and convert it to a fraction.
  1.75 – 1 = 0.75 = 75/100
• Reduce the fraction to the simplest form.
  75/100 = 3/4

3/4 is the Fraction odds equivalent of 1.75 Decimal odds.

Decimal to American conversion:

There are two methods, one for decimal odds more than 2.00 and one for decimal odds less than 2.00.

To convert a decimal odd of 2.00 or higher, let’s use 3.35 as an example:

• The moneyline equals the decimal odds minus 1 times 100.
  (3.35 – 1) x 100 = +235

+235 is the American odds equivalent of 3.35 Decimal odds.

To convert a decimal odd of less than 2.00, let’s use 1.9091 as an example:

• The moneyline equals -100 divided by the decimal odds minus 1.
  (-100) / (1.9091 – 1) = -109.99 = -110
• Then round the answer off into the closest round number.
  109.99 = -110

-110 is the American odds equivalent of 1.9091 Decimal odds.

Decimal To Fractional Odds Formula

Fractional to American conversion:

There are two methods, one for fractional odds more than 1/1 and one for fractional odds less than 1/1.

To convert a fractional odd of 1/1 or higher, let’s use 7/4 as an example:

• Convert the fraction to decimals by multiplying it by 100.
  7/4 * 100 = 1.40
• Then multiply that number by 100 again.
  1.40 * 100 = +140

+140 is the American odds equivalent of 7/4 Fractional odds.

To convert a fractional odd of 1/1 or lower, let’s use 1/10 as an example:

• Convert the fraction to decimals by multiplying it by 100.
  1/10 * 100 = 0.1
• Divide -100 by that answer.
  -100/0.1 = -1000

-1000 is the American odds equivalent of 1/10 Fractional odds.

Fractional to Decimal conversion:

Let’s use a 3/4 fractional odd as an example:

• Convert the fraction to a decimal by multiplying it by 100.
  3/4 x 100 = 0.75
• Add 1 to the decimal answer.
  0.75 + 1 = 1.75

Decimal To Fraction Odds Chart

1.75 is the Decimal odds equivalent of 3/4 Fractional odds.

American to Decimal conversion:

There are two methods, one for positive (+) odds and one for negative (-) odds.

To convert a positive odd, let’s use +235 as an example:

• Divide the money line by 100.
  235/100 = 2.35
• Add 1 to the previous answer.
  2.35 + 1 = 3.35

3.35 is the Decimal odds equivalent of +235 American odds.

To convert a negative odd, let’s use -110 as an example:

• Divide 100 by the money line.
  100/110 = 0.9091
• Add 1 to the previous answer.
  0.9091 + 1 =1.9091

1.9091 is the Decimal odds equivalent of -110 American odds.

Luckily, most online bookmakers have options to convert the odds automatically, but it is always a good idea to know the maths behind odd conversions in case that option isn’t available.