# calculation of beting odds

mrelephant | 21:54 Wed 19th Oct 2005 | How it Works

please can someone explain and show how fractions of decimal betting odds are calulated, for example, if i had an eachway accumulator where each selection resulted in a placing result, what would the following final 7 bet accumulated betting odds be?

price in decimals

3.0 @1/5th odds

2.1 @ 1/4 odds

3.5 @ 1/4 odds

10.0 @1/5th odds

1.5 @ 1/5th odds

2.25 @ 1/4 odds

Thanks

derek

No best answer has yet been selected by mrelephant. Once a best answer has been selected, it will be shown here.

Ok I'm assuming you have 6 places at the above decimal odds. So Starting with �1:

3.0 x 1/5 = 0.6 x 1 = 0.60 + 1 = 1.60

2.1 x 1/4 = 0.525 x 1.6 = 0.84 + 1.6 = 2.44

3.5 x 1/4 = 0.875 x 2.44 = 2.135 + 2.44 = 4.575

10 x 1/5 = 2 x 4.575 = 9.15 + 4.575 = 13.725

1.5 x 1/5 = 0.3 x 13.725 = 4.1175 + 13.725 = 17.8425

2.25 x 1/4 = 0.5625 x 17.8425 = 10.036 + 17.8425 = 27.8785

so if there was a 7th horse 27.88 would be going on for each �1 original stake.

PS are you in France as that's the only place I know where odds are in decimal?

Click here and the link will take you to a web-page which - in future - will do the calculating for you!

The site I recommended above uses British fractional odds, so you'll need to convert the decimal figures to fractions.

By the way, decimal odds in Europe represent the return...ie what the bookie will pay you if you win including your returned stake. For example, 3.00 represents British fractional odds of 2/1...the bookie gives you 2 of his plus your own 1 back = 3. So, 10.00 = 9/1...his 9 plus your 1; 1.5 = 1/2...his 1 plus your 2 (usually called '2 to 1 on'.)
Decimal odds as used in the USA represent only the profit element, so 3.00 represents 3/1; 10.0 = 10/1 and 1.5 represents 6/4.

Decimal odds are easier for accumulators, but you really need fractions for each-way quarters/fifths.

Basically, you now have an accumulator of:

3.0 = 2/1 -> 2/5 (1.4)

2.1=11/10 -> 11/40 (1.275)

3.5=5/2 -> 5/8 (1.625)

10.0=9/1 -> 9/5 (2.8)

1.5=1/2 ->1/10 (1.1) (each-way on a 1/2 shot?!)

2.25=5/4 -> 5/16 (1.31)

So, for your quid you'd get back �11.73...at least I hope so, I did work in a bookies!

So cooky you are assuming that the stake is included in the decimal odds then. For the record I wasn't