Converting to Decimal Odds

Decimal odds are a more modern way to look at betting especially online. If you are more familiar with fractional odds then it may seem complicated but in fact it is relatively easy to work out and so it is worth knowing how to convert fractions into the decimal odds that are used at most bookmakers these days. In this blog I will explain how to do just that with ease. All you will need is a calculator or pen and paper and the step-by-step instructions below.

Understanding what fractional odds such as 6/4, 3/1 and 10/3 represent makes the conversion process easy to understand. The left hand side of the odds tell you how much profit a bet will make after you stake the number of units on the right hand side. 3/1 therefore means that if you stake £1, you would make a profit of £3 for a total return of £4.

Decimal odds also tell you how much profit you will make from a bet, but as you will remember our decimal odds figures include our returned stake. This means that to convert fractional odds to decimal odds we need to take the left hand side of the fraction (we'll call this L), divide by the right hand side of the fraction (we'll call this R) and then add 1 to include the returned stake. This could be set out as:

( L / R ) + 1

Taking odds of 3/1 as an example, our conversion to decimal odds here would require us to take 3, divide by 1 and then add 1:

( 3 / 1 ) + 1
( 3 ) + 1 = 4.0

Odds-on fractional odds are converted in exactly the same way, so if you come across fractional odds such a 1/3, the calculation would be:

( 1 / 3 ) + 1
( 0.33 ) + 1 = 1.33

Decimal Odds Conversion Table

Although converting fractional odds to decimal odds is easy, many people like to have a decimal odds conversion table on hand to help them convert odds even when they don't have a calculator available. If this idea appeals to you then the decimal odds conversion table below is one that will help you to convert fractional odds from 1/5 to 9/1. For fractional odds of 10/1 and higher (and all fractions that just have 1 as the right hand side figure, come to that) you should be able to carry out the calculation in your head quite easily.

Fractional Odds	Decimal Odds
1/5	1.20
2/9	1.22
1/4	1.25
2/7	1.29
3/10	1.30
1/3	1.33
4/11	1.36
2/5	1.40
4/9	1.44
1/2	1.50
8/15	1.53
4/7	1.57
8/13	1.62
4/6	1.67
8/11	1.73
4/5	1.80
5/6	1.83
10/11	1.91
1/1	2.00
11/10	2.10
6/5	2.20
5/4	2.25
11/8	2.37
6/4	2.50
13/8	2.62
7/4	2.75
15/8	2.87
2/1	3.00
9/4	3.25
5/2	3.50
11/4	3.75
3/1	4.00
100/30	4.33
7/2	4.50
4/1	5.00
9/2	5.50
5/1	6.00
11/2	6.50
6/1	7.00
13/2	7.50
7/1	8.00
15/2	8.50
8/1	9.00
17/2	9.50
9/1	10.00