Results appear here as you type.
For information and entertainment only — not betting, financial or legal advice. Results are estimates based on your inputs.
How the Parlay / Accumulator Calculator works
Enter your stake and the odds of each selection. Combined odds are the product of every leg, so one losing leg loses the whole slip. Mark a leg as Void to treat it as odds of 1.00, or Lost to see the result of a failed leg.
Formula
- Combined decimal odds = odds₁ × odds₂ × … × oddsₙ
- Payout = stake × combined odds
- Chance all legs win = product of each leg’s implied probability (assumes independence and no margin)
Worked example
Three legs at 1.91, 2.05 and 1.75 combine to 6.85. A 10 stake returns 68.53 (58.53 profit).
Frequently asked questions
Why are parlays so popular and so risky?
The multiplied odds create a large headline payout, but every extra leg lowers the chance of winning and also multiplies the bookmaker margin.
How is a void leg treated?
A void leg is removed from the combination, which is the same as odds of 1.00.
Play responsibly
Calculators describe maths, not outcomes. Gambling is for adults aged 18+ and can be addictive — set limits and never stake money you cannot afford to lose.