Acca Calculator
Add the odds for each leg in your accumulator and see combined odds, total payout and net profit instantly.
Enter valid odds (above 1.00) for at least 2 legs and a stake greater than 0 to see the result.
The result is a mathematical estimate based on the odds you enter and does not account for cash-out fees, partial settlements, or odds changes at the operator. Play responsibly.
An accumulator (also called a parlay or combo bet) bundles several individual selections ("legs") into a single ticket where every leg must win for the bet to pay out. The odds multiply across legs, giving a much higher potential payout than betting each leg separately — at the cost of a lower overall hit probability. This calculator works out the combined odds, total payout and net profit instantly as you enter the odds for each leg.
How the calculation works
The combined odds of an accumulator are the product of every leg's decimal odds — not the sum. That's why the odds grow so fast as you add legs: each new leg multiplies the whole ticket's odds rather than simply adding to it.
Combined odds = odds₁ × odds₂ × … × oddsₙ · Payout = stake × combined odds · Net profit = payout − stake
The implied probability (the chance the whole ticket wins, according to the bookmaker's odds) is calculated the same way: take 1 divided by the odds for each leg and multiply them together. The more legs you add, the lower the combined probability gets — even when each individual leg looks safe.
Worked example
Say you build a three-leg accumulator with odds of 2.00, 1.80 and 2.50, staking 100. The combined odds are 2.00 × 1.80 × 2.50 = 9.00. The payout is 100 × 9.00 = 900, giving a net profit of 900 − 100 = 800 if all three legs win.
The implied probability of the whole ticket is (1/2.00) × (1/1.80) × (1/2.50) ≈ 11.1% — even though each individual leg might feel like a reasonably safe pick. That's the core trade-off of accumulators: high potential return, but a lower chance of landing than a single bet.
Frequently asked questions
What happens if one leg in my accumulator loses?
If a single leg loses (and isn't voided/refunded by the operator), the entire ticket loses and you receive no payout, regardless of how the other legs went. Every leg must win for an accumulator to pay out.
How many legs can I have in an accumulator?
Technically most operators support far more, but this calculator supports 2 to 10 legs — which covers the vast majority of accumulators actually placed. More legs mean higher potential odds, but make the ticket exponentially more sensitive to a single leg missing.
Is combined odds the same as adding up the odds of every leg?
No — that's a common misconception. Combined odds are the product (multiplication) of the decimal odds, not the sum. Two legs at 2.00 each, for example, give combined odds of 2.00 × 2.00 = 4.00, not 2.00 + 2.00 = 4 (which happens to look similar here, but the gap becomes large from three legs onward).
