Bet calculator
Returns for singles, doubles, trebles and accumulators, each-way or win only, with the bookmaker's combined margin.
- Total return
- $8.00
- Number of bets
- 1
- Total stake
- $1.00
- Profit
- $7.00
- Combined margin
- 13.6%
A treble on three selections at 2.00 returns $8 if all three win.
Quick answer
Three selections at 2.00 make three doubles or one treble. A $1 treble returns $8 if all three win (2 × 2 × 2). With a 5% margin on each selection, the bookmaker's combined edge on the treble is about 13.6%, much more than on a single.
Worked example
Formulas
Accumulator return = stake × odds₁ × odds₂ × … × oddsₙ
Void selection: counts as odds of 1.00
Each-way place odds = 1 + (odds − 1) × place fraction
Combined margin ≈ 1 − (1 ÷ (1 + margin))^legs
A $5 each-way double on a 6.00 winner and a 4.00 horse that places (1/5 odds) is two bets, $10 in total. The win double loses because the second horse didn't win. The place double pays at (1 + 5 × 0.2) × (1 + 3 × 0.2) = 2.00 × 1.60 = 3.20, so it returns $5 × 3.20 = $16.
Why multiples carry a bigger margin
Every selection's price includes the bookmaker's margin. In an accumulator the prices multiply, and so do the margins: at 5% per leg, a double carries about 9.3%, a treble 13.6% and a five-fold 21.6%. Bigger returns come with a bigger built-in edge.
Learn more in betting odds explained, and convert prices with the odds converter.
Questions
Frequently asked questions
How do you calculate an accumulator?
Multiply the decimal odds of every selection, then multiply by your stake. Four selections at 2.00 make 16.00, so a $1 four-fold returns $16 if all four win.
What happens if a selection is void?
A void selection, such as a non-runner, counts as odds of 1.00, so a treble with one void becomes a double.
How does an each-way bet pay?
Each-way is two bets: a win bet and a place bet at a fraction of the odds. If the selection wins, both pay; if it only places, just the place part pays.
What is the combined margin?
The bookmaker's edge across all legs of a multiple. With 5% per selection, a treble's combined margin is about 13.6%.
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