Many people like to spice up an afternoon by placing a small bet in the hopes of a big win! One of the most popular ways is placing an accumulator bet ( or "ACCA" for short) either at the bookmakers or with an online betting site. An accumulator involves betting on several events at once, and if the results all go your way, you'll be very happy.
What are the odds?
Fractions and Decimals
The traditional way of showing odds is a fraction such as 5/1. This means if you bet £1 and win, you receive £5 plus your £1 stake back making £6.
The newer way of showing odds is decimal. The decimal says what you will receive back for £1 bet. If the fraction is 5/1, the decimal is 6 because if you win you get £6 back.
FRACTION 

DECIMAL 
1/4 

1.25 
1/2 

1.5 
evens 1/1 

2 
5/4 

2.25 
2/1 

3 
7/2 

4.5 
10/1 

11 
Some of the traditional fractions don't use 1. If the odds are 6/4, this means that if you bet £4 you will win £6, plus you get your £4 stake back making £10. To convert 6/4 into a decimal you divide 6 ÷ 4 = 1.5 and then you add 1 to give the decimal odds of 2.5
The table shows some common bookmaker's fractions with their decimal equivalents.

To work out the possible payout of an accumulator, we use the decimal odds. The best betting sites can display the odds either as the traditional fractions or as decimals. The side panel explains how they both work!
An accumulator bet can cover up to 10 events or more, but let's start by looking at a simple treble bet on the winners of three horse races with decimal odds as follows:
STARBOY:   2 
DANDY:   8 
REDLEG:   3.5 

Suppose you bet £1 on Starboy and it wins. The decimal odds are 2, which means you receive 2 x £1 = £2.
Now suppose you take your £2 and put that on Dandy and it wins. The odds are 8, so you receive £2 x 8 = £16.
You now take your £16 and put it on Redleg and it wins. The odds are 3.5 so your final cash return is 3.5 x £16 = £56.
Your £1 treble bet has turned into £56!
With an accumulator, these events can all happen at the same time, and the winnings automatically combine. To work out the odds of this accumulator bet you just multiply the decimal odds: 2 x 8 x 3.5 = 56.
Note: these decimal odds of 56 are the same as fraction odds of 55/1
Shorter Odds, Bigger Accumulators
ROVERS:   1.2 
SPARTANS:   1.5 
WANDERERS:   2.4 
ATHLETIC:   1.4 
ALBION:   1.6 




With team games such as football, cricket or rugby, the odds tend to be a lot shorter, so it's worth looking at different online betting sites for the best deals. Suppose you pick five teams to win as shown.
Your odds for the fivefold accumulator are 1.2 x 1.5 x 2.4 x 1.4 x 1.6 = 9.68
Therefore if you put £1 on and all teams win, you'll receive £9.68 back.
EachWay Accumulators
EachWay Bets
An EW bet is two bets. One bet is to win and the second bet is to place (i.e. for a horse to come 2nd or 3rd in the race. If there are a large number of runners, the bookmaker may even count 4th as a place.) The odds given for the place are usually 1/5 of the win odds. If a horse is 10/1 to win, then the place will be 2/1. In decimal odds, this win is 11 and the place is 3.
If you are backing a single horse for £1 eachway, you pay for both bets, so this costs £2. Suppose you bet £5 EW on a horse at 10/1. Your stake is 2 x £5 = £10.
 If the horse wins you receive the winning bet £5 at 10/1 plus £5 stake returned = £55. You also receive the place bet £5 at 2/1 plus £5 stake returned = £15. Your total return will be £55 + £15 = £70.
 If the horse doesn't win but does place, you just receive the place bet £5 at 2/1 plus £5 stake returned = £15.

In normal accumulators, every event you bet on has to win. If just one loses then you come away with nothing! However in horse racing and some other events, it is possible to have an eachway accumulator.
Let's look at our three horses again, but this time with the place odds included.
  Win   Place 
STARBOY:   2   1.2 
DANDY:   8   2.4 
REDLEG:   3.5   1.5 

Let's put £1 on eachway. This will cost us £2.
 If all three horses win, we receive the win bets £1 x 2 x 8 x 3.5 = £56 PLUS we receive the place bets £1 x 1.2 x 2.4 x 1.5 = £4.32 making £60.32 in total.
 If one, two or all three horses place instead of winning, we just receive the place bets £1 x 1.2 x 2.4 x 1.5 = £4.32.
Note: if two horses win and one places, we don't get any more than if the horses all place!
 If any horse doesn't win or place, then we lose!
Multiple Bet Combinations and the Bookie's profit!
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The Betting Guide  and how to work out the Bookie's profit
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