Calculators / Accumulator / parlay
Accumulator calculator
Stack legs into one bet and see the combined price, the payout, and the real probability you are taking on — all of them have to land.
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| Leg | Odds |
|---|
Combined odds
American
Payout
Profit
Combined win probability (assuming each leg is independent):
How it works
The combined decimal price is every leg's decimal odds multiplied together. Payout is your stake times that combined price; profit is the payout minus your stake.
The combined probability multiplies each leg's implied probability. That assumes the legs are independent — correlated legs (same match, same team) make this an overestimate of your real chance, so treat it as a floor, not a guarantee.
Worked example
Three legs at 1.67, 2.20 and 2.80 (American −150, +120, +180) on a $20 stake.
| Combined odds | 10.27 |
| Payout | $205.33 |
| Profit | $185.33 |
| Combined probability | ≈ 9.7% |