Acca calculator
Work out the returns on your accumulator before you place it. Add your selections, switch between decimal and fractional odds, and watch your total odds, returns and profit update as you type.
Last updated: July 14, 2026
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Your acca
Need other bet types? Our full bet calculator covers singles, doubles, trebles, Lucky 15s, Yankees, each-way, Rule 4 and dead-heat settlement.
Open the bet calculatorWhat is an accumulator bet?
An accumulator — an acca — is a single bet that links several selections together. Every leg has to win for the bet to pay out. Miss one and the whole thing goes down.
The appeal is the price. Each winning leg rolls its returns onto the next, so the odds multiply rather than add up. A four-fold at short prices can still return a tidy sum from a small stake. The trade-off is obvious: the more legs you add, the harder the bet is to land.
Doubles and trebles are the small end of the scale. Add a fourth selection and it's a four-fold, a fifth makes it a five-fold, and so on. People often build football accas across a weekend's fixtures, but you can mix sports and markets in the same slip on most betting apps.
How acca returns are calculated
The maths is simpler than it looks. Convert every price to decimal odds, multiply them together, then multiply by your stake. That gives your total return — stake included. Subtract the stake to see the profit.
Here's a worked example: a £10 treble at odds of 2.0, 3.0 and 4.0.
| Step | Calculation | Running total |
|---|---|---|
| Leg 1 | Stake × 2.0 | £20.00 |
| Leg 2 | × 3.0 | £60.00 |
| Leg 3 | × 4.0 | £240.00 |
| Total return (profit £230.00) | £240.00 | |
The total odds are 2.0 × 3.0 × 4.0 = 24.0. A £10 stake at 24.0 returns £240, which is £230 profit once you take the stake back out. The calculator above does exactly this, and it converts fractional prices for you.
Fractional odds work the same way once you convert them. To turn a fraction into decimal odds, divide the top number by the bottom and add one. So 6/4 becomes 1.5 + 1 = 2.5, and 5/1 becomes 5 + 1 = 6.0. Evens is 1/1, which is 2.0.
Each-way accumulators explained
An each-way acca is really two bets in one: a win part and a place part. Your stake is doubled because each part is staked separately. A £10 each-way acca costs £20 in total.
The win part pays if every selection wins. The place part pays if every selection at least places — finishes in the places set by each event's terms. Place odds are a fraction of the win odds, usually a fifth or a quarter, so the place return is smaller but easier to land.
Place terms vary by event and by the number of runners, so the each-way mode above applies one place fraction across all your legs as a guide. Always check the each-way terms shown on your bet slip before you confirm the bet.
Tips for building an acca
- Fewer, stronger legs usually beat a long-shot ten-fold. Each extra selection lowers your chance of landing the lot.
- Check whether your app offers acca insurance or a bonus on winning multiples — terms differ, so read them first.
- Watch the settlement rules for a void leg. Most bookmakers simply remove a non-runner and recalculate the acca on the remaining legs.
- Set a deposit limit before you start, and treat any acca as entertainment rather than a way to make money.
Building football accas in particular? Our guide to the best football betting apps compares bet builders, price boosts and acca features across the UK's licensed operators. For every sport and market, start with our round-up of the top betting apps.
Acca calculator FAQ
How does an acca calculator work?
It converts each of your prices to decimal odds, multiplies them together to get the total odds, then multiplies that by your stake. The result is your total return, and the profit is that figure minus your stake.
How many selections can an acca have?
An acca needs at least two selections and most apps let you add many more. This calculator handles two upwards, so you can price a double or a longer multiple. Bear in mind that each extra leg makes the bet harder to land.
Do all selections need to win?
Yes. For a standard win acca, every leg must win or the bet loses. If a selection is a non-runner, most bookmakers void that leg and settle the acca on the ones that remain. Each-way accas add a place part that pays if every leg places.
How do I convert fractional odds to decimal?
Divide the first number by the second, then add one. So 6/4 is 1.5 + 1 = 2.5, and 5/1 is 5 + 1 = 6.0. Evens is 1/1, which comes to 2.0. Switch the calculator to fractional mode and it does the conversion for you.
Can I work out an each-way acca?
Yes. Tick the each-way box and pick your place terms. The calculator doubles your stake to cover the win and place parts, then shows the win return, the place return and the combined total if the bet lands in full. Place terms vary by event, so treat it as a guide.
Is this calculator free to use?
Yes, it's free and works entirely in your browser — nothing you type is sent anywhere. It's an editorial tool from BettingApps.org to help you understand a bet before you place it. You must be 18 or over to bet.