How to work out an acca
- Enter the stakeThe amount you put on the whole accumulator, in naira.
- Add each selectionType the decimal odds of every leg. Use Add selection for more legs, up to 20.
- Set the result of each legWon keeps the odds, Lost sets the return to zero, Void counts the leg at 1.00.
- Add the bonusIf your bookmaker pays an acca bonus, type its percentage. It is added to the profit only.
The formula
Total odds = odds of leg 1 × odds of leg 2 × ... × odds of the last leg. Return = stake × total odds. Profit = return minus stake. The acca bonus is a share of that profit, so a 5% bonus on ₦8,546 of profit adds ₦427.
Worked example
| Leg | Odds | Running total odds |
|---|---|---|
| 1 | 1.45 | 1.45 |
| 2 | 1.90 | 2.76 |
| 3 | 2.10 | 5.79 |
| 4 | 1.65 | 9.55 |
A ₦1,000 stake returns ₦9,546.08, a profit of ₦8,546.08. The implied chance that all four win is about 10.5%, roughly one slip in ten, and less once the bookmaker's margin is counted.
Each leg you add multiplies the margin too. Four legs at a 5% margin each leave you with about 81% of fair value. Read why in our accumulator guide.
Void and postponed legs
When a match is postponed or a market is voided, the leg usually drops out at odds of 1.00 and the rest of the acca stands. In the example above, a void third leg cuts the total odds to 4.55 and the return to ₦4,545.75.
Accumulator calculator FAQ
How many legs can I add?
Up to 20. Long accas are easy to enter but very hard to win: twenty legs at 1.50 imply a chance of about 0.03%.
Is the acca bonus paid on the stake?
Usually not. Most acca bonuses are a percentage of the winnings, and many need a minimum number of legs at minimum odds. Check your bookmaker's terms.
What is the difference between an acca and a system bet?
An acca is one bet that needs every leg to win. A system bet splits the stake into many smaller multiples, so it can still pay when a leg loses.
Why is the implied chance useful?
It turns the odds into a plain percentage. Seeing 4% next to a big return is a quick reminder of how often that slip really lands.