This accumulator calculator works out the return on an acca before you place it. Enter the odds for each selection, add or remove legs, set each one as a win or a loss and see the total return and profit for your stake. Odds can be fractions, decimals or American.
- An accumulator is one bet on several selections. Every selection has to win for it to pay.
- The sum: multiply the decimal odds of every leg together, then multiply by your stake.
- Example: legs at evens, 2/1, 6/4 and 3/1 multiply to 60, so €10 returns €600 (a €590 profit).
Use the Bet type menu to switch between an accumulator, a double and a treble. Tap a selection to set it as a winner or a loser and the return updates straight away.
How is an accumulator worked out?
An accumulator multiplies the odds of each selection together. Fractional odds are converted to decimal first: add one to the fraction, so 2/1 becomes 3.0 and 6/4 becomes 2.5. Evens is 2.0. If you prefer to see the conversion done for you, use our odds converter.
Your return is the stake multiplied by the combined decimal odds. Profit is the return minus the stake. If any leg loses, the whole bet loses. If a leg is void, for example a non-runner, it is usually treated as odds of 1.0 and the bet carries on with one fewer leg.
Worked example: a four-fold
Take four selections at evens (2.0), 2/1 (3.0), 6/4 (2.5) and 3/1 (4.0), with a €10 stake.
Multiply the decimals: 2.0 × 3.0 × 2.5 × 4.0 = 60. The return is €10 × 60 = €600, which is a profit of €590. If any one leg loses, the return is €0 and you lose the €10.
How fast do accumulator odds grow?
Every extra leg multiplies the price, which is why accumulators can pay a lot from a small stake. The table shows a €10 stake with every leg at evens (2.0).
| Legs | Combined odds | Return on €10 |
|---|---|---|
| 2 | 4 | €40 |
| 3 | 8 | €80 |
| 4 | 16 | €160 |
| 5 | 32 | €320 |
| 6 | 64 | €640 |
| 8 | 256 | €2,560 |
| 10 | 1,024 | €10,240 |
Remember the other side of the sum. If each leg has a 50% chance, the chance of all of them winning halves with every leg: 25% for two, 12.5% for three and 6.25% for four. Bookmakers also build a margin into every price, and that margin compounds as you add legs. Our guide to how betting odds work explains how to turn odds into chances.
Accumulator or single bets?
A single bet on each selection pays when any one wins. An accumulator pays only if all win, but pays far more when they do. A middle route is a bet that covers several combinations, such as a Trixie calculator (three selections) or a Yankee calculator (four). Those pay when only some selections win. Our bet types guide compares them.
Accumulators on football and racing
Football accumulators are the most popular in Ireland, usually on Saturday’s Premier League games. Check team news first, because line-ups come about an hour before kick-off. See our Premier League predictions and odds guide and the Premier League hub for fixtures, tables and club guides, or the football betting guide for Ireland.
Racing accumulators can include each-way legs. If you want to bet each way, use the each way calculator to see how the win and place parts pay, and read the horse racing betting guide.
What this calculator leaves out
This calculator is a guide only. It does not apply Rule 4 deductions, dead heats, bonuses, boosts, early-payout offers or bet builders, and bookmakers can round or settle slightly differently. Check your slip and the bookmaker’s terms before you rely on a figure. Our bet calculator has a section on Rule 4 and dead heats.
Related guides
- Bet calculator
- Yankee calculator
- Trixie calculator
- Each way calculator
- Odds converter
- Bet types explained
- Free bets
Frequently asked questions
How do you calculate an accumulator?
Convert each price to decimal odds, multiply them together and multiply by your stake. Four selections at 2.0, 3.0, 2.5 and 4.0 multiply to 60, so a €10 stake returns €600.
What happens if one leg of an accumulator loses?
The whole bet loses, because every selection must win. A void leg is normally treated as odds of 1.0 and the bet continues on the remaining legs.
How many selections can you put in an accumulator?
Most bookmakers allow a large number, but this calculator handles up to eight legs, which covers most slips.
Is an accumulator better than single bets?
It is riskier. An accumulator pays far more if every leg wins but pays nothing if one fails, while single bets pay for each winner. Which suits you depends on your confidence and how much you want to risk.
Can I use fractional odds in this accumulator calculator?
Yes. Enter fractions such as 6/4, decimals such as 2.5, or American odds, and the calculator converts them for you.
Sources and further reading
- GamblingCare.ie – free, confidential gambling support in Ireland
18+. Please play responsibly, gamblingcare.ie. This guide is independent editorial opinion; it is not a guarantee, endorsement or financial advice, and does not imply any affiliate or commercial relationship with any operator named.
Last updated 27 October 2026. Written and checked by the Punter Ireland editorial team. Offers, odds and rules change, so always check the operator’s own terms and the official sources above.
