Quantitative Betting Calculator
Parlay Calculator
A parlay calculator multiplies the odds of every leg to show your combined odds, total payout, and profit on a multi-leg bet. Enter each leg's odds and your stake, then add or remove legs to see how the payout grows - and how quickly the win probability shrinks.
Combine multiple selections into one parlay ticket. Every leg must win — payouts multiply together, and so does the sportsbook's vig.
How the parlay calculator works
Add each leg's odds
Enter every selection in the parlay. The calculator converts each to decimal odds and multiplies them together to get the combined price.
Multiply for the payout
Your stake times the combined decimal odds is the total return; subtract the stake for profit. Each added leg multiplies the payout but also multiplies the risk.
See the trade-off
A parlay pays more than the same picks bet singly, but every leg must hit. One miss loses the whole ticket - which is why parlays carry a higher built-in hold for the book.
Parlay payout formula
Combined decimal odds = decimal₁ × decimal₂ × … × decimalₙ. Total payout = Stake × combined decimal. Profit = payout − stake.
Example — A 3-leg parlay of three −110 bets (decimal 1.909 each) multiplies to 1.909³ ≈ 6.96. A $100 stake returns about $696, for roughly $596 profit - versus $273 profit betting all three singly.
Frequently Asked Questions
What is a parlay bet?
A parlay combines two or more bets into one ticket. Every leg must win for the parlay to pay, and the odds of all legs are multiplied together, producing a much larger payout than the legs would earn separately.
How is a parlay payout calculated?
Each leg's odds are converted to decimal form and multiplied together to get the combined odds, then multiplied by your stake. The parlay calculator does this automatically as you add legs.
Are parlays a good bet?
Parlays offer big payouts but carry a higher house margin than single bets because the book's edge compounds across every leg. They're fun for upside but statistically harder to beat than straight bets.
What is a same-game parlay?
A same-game parlay combines multiple bets from a single game. Legs are often correlated, so books price them with their own adjusted odds rather than a straight multiplication.
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Apply This Math to Live Vegas Markets
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