Parlay Calculator
Every leg has to hit. The implied probability shows how rarely that happens — which is why the payout looks big. Parlays multiply the book's vig across every leg, so they carry a steeper long-term cost than betting each leg straight.
How parlay odds work
A parlay combines multiple bets into one. Every leg has to win for the ticket to cash, and in exchange the payouts compound. The math is simple: convert each leg to decimal odds, multiply them together, and multiply by your stake.
That compounding is why a modest stake can pay out large — and also why parlays are tougher than they look. Each added leg multiplies the sportsbook's vig on top of the longer odds, so the book's edge grows with every leg. A three-team parlay of coin-flips only hits around one time in seven.
None of that means parlays are unbeatable — it means each leg has to clear the same bar a straight bet would: a real edge over the price. That is the discipline behind expected value, and it is why our model grades every play individually rather than stacking them.
Frequently asked questions
How is a parlay payout calculated?
Convert each leg to decimal odds, multiply them together, then multiply by your stake. The result is your total return including stake; subtract the stake to get profit. Three -110 legs (decimal 1.91 each) multiply to about 6.96, so a $100 parlay returns roughly $696.
Why are parlays considered a bad bet?
Each leg already carries the sportsbook's vig, and a parlay multiplies that margin across every leg. The more legs you add, the larger the book's built-in edge — even though the payout looks tempting.
What is the probability of my parlay hitting?
Multiply the implied probability of each leg. Three coin-flip legs at roughly 52% each give a combined probability near 14%, meaning the parlay loses about six times out of seven.