Accumulator Calculator
Calculate accumulator returns from 2 to 14 selections. Enter your stake and the decimal odds of each leg to see combined odds, potential returns and profit — including any acca boost your bookmaker offers.
Selections (3/14)
Your Results
All legs must win for an accumulator to pay out. Acca boosts are applied to winnings (profit), not to the total returns.
How Accumulator Returns Are Calculated
An accumulator multiplies the decimal odds of every selection into one combined price: returns = stake × odds₁ × odds₂ × … × oddsₙ. A £10 treble at 1.80, 2.10 and 1.65 has combined odds of 6.24, returning £62.37 for £52.37 profit.
The multiplication is what makes accas both attractive and risky: each extra leg raises the potential payout and simultaneously lowers the chance that every leg wins. Bookmakers price this in — the overround compounds with every selection you add, which is why long accumulators are among the most profitable products for the bookmaker.
Acca Boosts
Many UK bookmakers add a percentage boost to accumulator winnings, typically scaling with the number of legs (for example 5% on a 4-fold up to 50%+ on a 14-fold). The boost applies to your profit, not your stake: a £52.37 profit with a 10% boost becomes £57.61. Boost terms vary — minimum odds per leg and maximum extra winnings are common conditions.
Worked Example
£5 five-fold at 1.50, 1.80, 2.00, 1.70, 2.20: combined odds = 1.50 × 1.80 × 2.00 × 1.70 × 2.20 = 20.20. Returns £100.98, profit £95.98. The same five selections as singles would need every bet to win anyway to match it — the acca simply reinvests each win into the next leg automatically.
Frequently Asked Questions
What happens to my accumulator if a match is postponed?
Most bookmakers treat a postponed or void leg as odds of 1.00: the acca stands with one leg fewer. A 5-fold becomes a 4-fold, and the combined odds drop accordingly rather than the whole bet being voided.
How many selections should an accumulator have?
There is no magic number, but the maths is unforgiving: five legs each with a 60% chance of winning give the acca roughly a 7.8% chance of landing. Shorter accas at fair prices lose less to the compounding overround than long-shot ten-folds.
Can I do an each-way accumulator?
Yes — an each-way acca is two accumulators in one: a win acca and a place acca at the each-way fraction of each leg. Stake doubles, like any each-way bet. Use the Bet Calculator for each-way maths on a single selection.
Are accumulator odds the same at every bookmaker?
No. Small differences per leg compound: a 2% better price on each of six legs is roughly 12% more combined odds. Compare prices leg by leg — our Odds Converter helps when books quote in different formats.
Accumulators are high-variance bets: expect long losing runs even with good picks. Set a budget and stick to it. 18+. If gambling stops being fun, see our responsible gambling resources.