Betting calculator
Accumulator Calculator
Use this accumulator calculator to multiply the odds from two or more selections and work out the combined odds, potential return and profit.
Enter your stake and odds
Add each leg of your accumulator, then enter the decimal odds for each selection.
| Selection | Decimal odds | Implied probability | |
|---|---|---|---|
| 50.00% | |||
| 55.56% | |||
| 40.00% |
A £10.00 stake at combined odds of 9.00 would return £90.00, including £80.00 profit.
What is an accumulator?
An accumulator is a bet that combines two or more selections into one larger bet. Each selection is known as a leg. For the accumulator to win, every leg must win.
Accumulators are popular because the odds multiply together, which can create larger potential returns from a smaller stake. The downside is that one losing selection loses the whole accumulator.
Accumulator formula
With decimal odds, calculating an accumulator is simple. Multiply all the decimal odds together, then multiply the combined odds by your stake.
Combined odds = odds 1 × odds 2 × odds 3...
Total return = stake × combined odds
Profit = total return − stake
Example accumulator calculation
Imagine a three-selection accumulator with odds of 2.00, 1.80 and 2.50.
| Selection | Decimal odds |
|---|---|
| Selection 1 | 2.00 |
| Selection 2 | 1.80 |
| Selection 3 | 2.50 |
2.00 × 1.80 × 2.50 = 9.00
If the stake is £10, the total return would be £90. That includes the original £10 stake and £80 profit.
Why accumulator odds grow quickly
Accumulator odds grow quickly because every selection multiplies the combined price. Adding another leg can increase the possible return, but it also makes the bet harder to win because every selection must be correct.
| Bet type | Number of selections | What must happen? |
|---|---|---|
| Single | 1 | One selection must win. |
| Double | 2 | Both selections must win. |
| Treble | 3 | All three selections must win. |
| Accumulator | 4 or more | Every selection must win. |
This is why accumulators can look attractive but are usually much harder to land than they first appear.
Accumulator implied probability
The combined decimal odds can also be converted into implied probability. This shows the chance suggested by the combined odds before considering whether the price is fair or whether any bookmaker margin is included.
Accumulator implied probability = 1 ÷ combined decimal odds × 100
For example, combined odds of 9.00 imply a probability of 11.11%.
Accumulator vs dutching
Accumulators and dutching are very different betting calculations.
| Method | How it works | Main risk |
|---|---|---|
| Accumulator | You combine multiple selections and need all of them to win. | One losing selection loses the whole bet. |
| Dutching | You split a stake across multiple outcomes. | An uncovered outcome can still win. |
An accumulator multiplies odds together. Dutching splits your stake across outcomes. If you want to split a stake across multiple selections, use the Dutching Calculator.
Common accumulator mistakes
Adding too many selections
Adding more selections increases the potential return, but it also makes the bet much harder to win. Every added leg creates another way for the accumulator to fail.
Focusing only on the potential return
Big returns can look exciting, but the combined implied probability may be low. The accumulator calculator shows both the return and the implied probability.
Assuming short odds are safe
Short-priced selections can still lose. Combining several short-priced favourites can create an accumulator that looks safe but still has a meaningful chance of failing.
Ignoring bookmaker margin
Each leg in an accumulator comes from a market that may already include bookmaker margin. When several selections are combined, those margins can matter.
Related betting calculators
Accumulators are closely linked to odds conversion, implied probability and bookmaker margin.
Accumulator calculator FAQs
What does an accumulator calculator do?
An accumulator calculator multiplies the odds from each selection and shows the combined odds, potential return, profit and implied probability.
How many selections do I need for an accumulator?
Technically, two selections make a double and three selections make a treble. Many people use “accumulator” or “acca” more generally for multiple-selection bets. This calculator works with two or more selections.
How do you calculate accumulator odds?
With decimal odds, multiply all the odds together. For example, 2.00 × 1.80 × 2.50 = 9.00.
Does the return include my stake?
Yes. Decimal odds show the total return including the original stake. Profit is the total return minus your stake.
Are accumulators good value?
Not automatically. Accumulators can offer larger returns, but every selection must win. They can also combine bookmaker margin across several markets.