Understanding Decimal Odds

Decimal prices (or odds) are different to the traditional fractional odds that have historically been used by the majority of UK bookmakers. It’s just a different way of displaying the same information, but for those of you who are used to fractional odds, it may take some getting used to.

Prices on the betting exchange are displayed as a decimal number. Most online bookmakers give you the choice of displaying odds as fractional or decimal. If you choose decimal, it’s much easier to compare the odds at the bookie to those at the exchange.

The lowest possible price available on the betting exchange is 1.01 and the highest possible price is 1000. Although you may find prices higher than 1000 at a bookie, it’s pretty unlikely.

Decimal odds differ from the fractional odds traditionally quoted in the UK in that they include your stake as part of your total return. If you place a bet of £10 at Decimal Odds of 4.0 and win, then your total return (including stake) is £40. In fractional odds, this would be quoted as 3/1, returning to you winnings of £30 plus your original stake of £10.

Decimal Odds are simpler to use than fractional odds, and are the most common form of Odds quoted in countries outside the UK.

One of the major advantages of decimal odds over fractional odds is that it is very easy to compare two different prices and instantly tell which one is higher. For example, without using a calculator, can you instantly tell which is higher:

4/7 or 8/15

No? Well, me neither. But let’s convert both prices into decimals and try again. Which is higher:

1.57 or 1.53

Now, using decimals it is easy to compare the prices and know that 1.57 is the higher price.

Whenever you buy or sell a bet from another Betfair user, you must agree this transaction at one of the available decimal prices on the exchange.

If you are used to using fractional odds, you can easily convert these into decimals by simply dividing the first number by the second number, then adding one.

For example, 4/5 would be (4 divided by 5) = 0.8, then add one to give decimal odds of 1.80.

The following conversion table shows some common fractional odds, and their decimal equivalents.

Fractional / Decimal Odds Conversion Table

Fractional

Decimal

10/1

11.0

5/1

6.0

4/1

5.0

3/1

4.0

2/1

3.0

Evens

2.0

10/11

1.91

5/6

1.83

4/5

1.8

8/11

1.73

4/6

1.67

4/7

1.57

1/2

1.5

4/9

1.44

2/5

1.4

1/3

1.33

1/4

1.25

1/5

1.2

1/10

1.1