Parlay and Accumulator Calculator: Combined Odds & Payout
Free parlay and accumulator calculator: multiply the decimal odds of each leg and get combined odds, implied probability, total return and net profit.
This parlay calculator (also called an accumulator calculator) multiplies the decimal odds of each leg and shows the combined odds, the gross implied probability, the total return and the net profit.
Parlay and accumulator calculator
Multiplies the decimal odds of each leg and gives the combined odds, implied probability, total return and net profit.
A parlay wins only if every leg wins. The calculation is arithmetic and ignores any operator's own rules (voids, limits).
How it works
Enter the decimal odds of each leg (you can add up to 20) and the stake. A parlay wins only if every leg wins; the combined odds are the product of the individual odds. If your odds are American or fractional, convert them first with the odds calculator.
Formulas
- Combined odds:
D = D₁ × D₂ × … × Dₙ. - Gross implied probability:
1 / D. - Total return = stake ×
D; net profit = stake × (D− 1).
Worked example
Three legs at 1.80, 2.10 and 1.65 with a stake of 100: 1.80 × 2.10 = 3.78; 3.78 × 1.65 = 6.24. Total return: 623.70. Net profit: 523.70. Gross implied probability: 16.03%.
Things to keep in mind
- Every added leg multiplies the odds but also lowers the chance that all legs land: the implied probability in this example is 16.03%.
- The bookmaker's margin builds up on each leg, so parlays usually carry a larger total margin than a single bet.
- An operator's own rules (voided legs, payout limits) can change the real result.
Next steps
- The margin builds up on every leg; to see how much of a price is margin, strip the margin from the odds.
- If you have your own probability for a leg, work out the expected value of a leg against the price.
- When only the last leg is left to play, you can hedge the last leg and see what return you lock in.
- To decide what share of your bankroll a slip like this should take, check the bankroll percentage and Kelly stake.
- Prefer to understand slips first? See the difference between a single and an accumulator.
Frequently asked questions
How do you calculate a parlay?
Multiply the decimal odds of all legs, then multiply the result by the stake.
What happens if one leg loses?
The whole parlay loses, unless the operator voids that leg under its rules.
What is the difference between a parlay and an accumulator?
None in substance: parlay is the American name, accumulator the British one.
Can I use American odds?
Convert them to decimal first with the odds calculator, then enter them here.
To convert odds formats use the odds calculator.
18+. Take part only where it is legal. Betting carries a risk of loss. Do not treat potential returns as a budget and do not chase losses. If gambling stops being under control, stop and look for help from the support services in your country.
