A parlay (also called an accumulator, acca, or multi) combines several bets into one, multiplying the odds together for a much bigger payout — but every leg must win. This calculator multiplies your legs, shows the combined odds, and returns the exact payout and profit for your stake.
How parlay odds work
To combine bets into a parlay, you multiply the decimal odds of every leg together. Two legs at 1.5 and 2.0 give combined odds of 3.0; add a third at 1.8 and it becomes 5.4. Your potential payout is that combined figure times your stake.
The catch is that the probabilities multiply too. Each extra leg makes the whole ticket less likely to win, so parlays trade a low hit-rate for a high payout. They are exciting but generally lower expected value than the same bets placed singly, because the bookmaker margin compounds across legs.
This calculator is format-agnostic on intent but expects decimal odds. Enter each leg and your stake to see the combined odds, payout, and profit update instantly.
Worked example
Take three legs at decimal odds of 1.50, 2.00, and 1.80, with a $20 stake.
Combined odds = 1.50 × 2.00 × 1.80 = 5.40. Payout = $20 × 5.40 = $108.
That is a profit of $88 on a $20 stake if all three legs win. Miss any single leg and the whole parlay loses — the trade-off for the multiplied return.